diff --git a/server/trpc/character-router.test.ts b/server/trpc/character-router.test.ts
new file mode 100644
index 000000000..3ca641595
--- /dev/null
+++ b/server/trpc/character-router.test.ts
@@ -0,0 +1,256 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { appRouter } from './index';
+
+describe('tRPC API Layer - Character System', () => {
+  let ctx: { userId: string };
+  let projectId: string;
+
+  beforeEach(async () => {
+    ctx = { userId: '123e4567-e89b-12d3-a456-426614174000' };
+    const project = await appRouter.project.createProject.mutate({
+      input: { name: 'Character System Test Project' },
+      ctx,
+    });
+    projectId = project.id;
+  });
+
+  describe('createCharacter', () => {
+    it('should create a character with all profile fields', async () => {
+      const character = await appRouter.project.createCharacter.mutate({
+        input: {
+          name: 'John Doe',
+          bio: 'A brave hero',
+          role: 'protagonist',
+          arc: 'Grows from coward to leader',
+          arcType: 'positive',
+          age: 30,
+          gender: 'male',
+          voice: 'Deep, commanding',
+          traits: 'Brave, loyal, stubborn',
+          motivation: 'Protect his family',
+          conflict: 'Internal fear of failure',
+          secret: 'Afraid of heights',
+          projectId,
+        },
+        ctx,
+      });
+
+      expect(character).toMatchObject({
+        name: 'John Doe',
+        bio: 'A brave hero',
+        role: 'protagonist',
+        arcType: 'positive',
+        age: 30,
+        projectId,
+      });
+      expect(character.slug).toBe('john-doe');
+    });
+
+    it('should default role to supporting when not provided', async () => {
+      const character = await appRouter.project.createCharacter.mutate({
+        input: {
+          name: 'Jane Smith',
+          projectId,
+        },
+        ctx,
+      });
+
+      expect(character.role).toBe('supporting');
+    });
+  });
+
+  describe('updateCharacter', () => {
+    it('should update character profile fields', async () => {
+      const created = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Original', projectId },
+        ctx,
+      });
+
+      const updated = await appRouter.project.updateCharacter.mutate({
+        input: {
+          id: created.id,
+          name: 'Updated Name',
+          bio: 'New bio',
+          role: 'antagonist',
+        },
+        ctx,
+      });
+
+      expect(updated.name).toBe('Updated Name');
+      expect(updated.slug).toBe('updated-name');
+      expect(updated.bio).toBe('New bio');
+      expect(updated.role).toBe('antagonist');
+    });
+  });
+
+  describe('searchCharacters', () => {
+    it('should filter characters by query', async () => {
+      await appRouter.project.createCharacter.mutate({
+        input: { name: 'Alice', bio: 'The hero', projectId },
+        ctx,
+      });
+      await appRouter.project.createCharacter.mutate({
+        input: { name: 'Bob', bio: 'The villain', projectId },
+        ctx,
+      });
+
+      const results = await appRouter.project.searchCharacters.query({
+        input: { projectId, query: 'hero' },
+        ctx,
+      });
+
+      expect(results.length).toBe(1);
+      expect(results[0].name).toBe('Alice');
+    });
+
+    it('should filter characters by role', async () => {
+      await appRouter.project.createCharacter.mutate({
+        input: { name: 'Protag', role: 'protagonist', projectId },
+        ctx,
+      });
+      await appRouter.project.createCharacter.mutate({
+        input: { name: 'Antag', role: 'antagonist', projectId },
+        ctx,
+      });
+
+      const results = await appRouter.project.searchCharacters.query({
+        input: { projectId, role: 'protagonist' },
+        ctx,
+      });
+
+      expect(results.length).toBe(1);
+      expect(results[0].name).toBe('Protag');
+    });
+  });
+
+  describe('createRelationship', () => {
+    it('should create a relationship between two characters', async () => {
+      const charA = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character A', projectId },
+        ctx,
+      });
+      const charB = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character B', projectId },
+        ctx,
+      });
+
+      const rel = await appRouter.project.createRelationship.mutate({
+        input: {
+          characterIdA: charA.id,
+          characterIdB: charB.id,
+          relationshipType: 'friendship',
+          strength: 80,
+          isAntagonistic: false,
+        },
+        ctx,
+      });
+
+      expect(rel.characterIdA).toBe(charA.id);
+      expect(rel.characterIdB).toBe(charB.id);
+      expect(rel.relationshipType).toBe('friendship');
+      expect(rel.strength).toBe(80);
+    });
+
+    it('should prevent self-relationships', async () => {
+      const charA = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character A', projectId },
+        ctx,
+      });
+
+      await expect(
+        appRouter.project.createRelationship.mutate({
+          input: {
+            characterIdA: charA.id,
+            characterIdB: charA.id,
+            relationshipType: 'friendship',
+          },
+          ctx,
+        })
+      ).rejects.toThrow('Cannot create a relationship with the same character');
+    });
+
+    it('should prevent duplicate relationships', async () => {
+      const charA = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character A', projectId },
+        ctx,
+      });
+      const charB = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character B', projectId },
+        ctx,
+      });
+
+      await appRouter.project.createRelationship.mutate({
+        input: {
+          characterIdA: charA.id,
+          characterIdB: charB.id,
+          relationshipType: 'friendship',
+        },
+        ctx,
+      });
+
+      await expect(
+        appRouter.project.createRelationship.mutate({
+          input: {
+            characterIdA: charA.id,
+            characterIdB: charB.id,
+            relationshipType: 'rivalry',
+          },
+          ctx,
+        })
+      ).rejects.toThrow('Relationship already exists between these characters');
+    });
+  });
+
+  describe('deleteCharacter', () => {
+    it('should remove associated relationships when deleting a character', async () => {
+      const charA = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character A', projectId },
+        ctx,
+      });
+      const charB = await appRouter.project.createCharacter.mutate({
+        input: { name: 'Character B', projectId },
+        ctx,
+      });
+
+      await appRouter.project.createRelationship.mutate({
+        input: {
+          characterIdA: charA.id,
+          characterIdB: charB.id,
+          relationshipType: 'friendship',
+        },
+        ctx,
+      });
+
+      await appRouter.project.deleteCharacter.mutate({
+        input: { id: charA.id },
+        ctx,
+      });
+
+      const rels = await appRouter.project.getRelationshipsForCharacter.query({
+        input: { characterId: charB.id },
+        ctx,
+      });
+
+      expect(rels.length).toBe(0);
+    });
+  });
+
+  describe('getCharacterStats', () => {
+    it('should return stats for a character', async () => {
+      const charA = await appRouter.project.createCharacter.mutate({
+        input: { name: 'TestChar', projectId },
+        ctx,
+      });
+
+      const stats = await appRouter.project.getCharacterStats.query({
+        input: { characterId: charA.id },
+        ctx,
+      });
+
+      expect(stats.characterId).toBe(charA.id);
+      expect(stats.sceneCount).toBe(0);
+      expect(stats.totalDialogueLines).toBe(0);
+      expect(stats.relationshipCount).toBe(0);
+    });
+  });
+});
diff --git a/server/trpc/index.ts b/server/trpc/index.ts
new file mode 100644
index 000000000..95b6b2478
--- /dev/null
+++ b/server/trpc/index.ts
@@ -0,0 +1,41 @@
+import { initHTTPServer } from '@trpc/server/adapters/http';
+import { projectRouter } from './project-router';
+import type { TRPCContext } from './types';
+import type { TRPCError } from '@trpc/server';
+
+// App router combining all routers
+export const appRouter = {
+  project: projectRouter,
+};
+
+export type AppRouter = typeof appRouter;
+
+// Create tRPC HTTP server
+export function createTRPCServer(port: number = 8080) {
+  const server = initHTTPServer({
+    router: appRouter,
+    createContext: async ({ req }: { req: Request }): Promise<TRPCContext> => {
+      // Extract auth from headers
+      const authHeader = req.headers.get('authorization');
+      const userId = authHeader?.split(' ')[1]; // Bearer token
+      
+      return {
+        userId,
+      };
+    },
+    onError: ({ error, path, input }: { error: TRPCError; path: string; input: unknown }) => {
+      console.error(`tRPC error on ${path}:`, {
+        input,
+        error: error.message,
+      });
+    },
+  });
+
+  server.listen(port, () => {
+    console.log(`tRPC server listening on port ${port}`);
+  });
+
+  return server;
+}
+
+export default appRouter;
diff --git a/server/trpc/project-router.test.ts b/server/trpc/project-router.test.ts
new file mode 100644
index 000000000..77f92954b
--- /dev/null
+++ b/server/trpc/project-router.test.ts
@@ -0,0 +1,211 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import { appRouter } from './index';
+import type { Project } from '../../server/types/project';
+
+describe('tRPC API Layer', () => {
+  let ctx: { userId: string };
+
+  beforeEach(() => {
+    ctx = { userId: '123e4567-e89b-12d3-a456-426614174000' };
+  });
+
+  describe('Project CRUD', () => {
+    it('should create a project', async () => {
+      const project = await appRouter.project.createProject.mutate({
+        input: {
+          name: 'Test Project',
+          description: 'A test project',
+        },
+        ctx,
+      });
+
+      expect(project).toMatchObject({
+        name: 'Test Project',
+        description: 'A test project',
+        userId: ctx.userId,
+      });
+      expect(project.id).toBeDefined();
+      expect(project.createdAt).toBeInstanceOf(Date);
+      expect(project.updatedAt).toBeInstanceOf(Date);
+    });
+
+    it('should list projects', async () => {
+      const projects = await appRouter.project.listProjects.query({
+        ctx: { userId: ctx.userId },
+      });
+
+      expect(Array.isArray(projects)).toBe(true);
+    });
+
+    it('should get a specific project', async () => {
+      // First create a project
+      const created = await appRouter.project.createProject.mutate({
+        input: { name: 'Get Test' },
+        ctx,
+      });
+
+      const project = await appRouter.project.getProject.query({
+        input: { id: created.id },
+        ctx,
+      });
+
+      expect(project.id).toBe(created.id);
+      expect(project.name).toBe('Get Test');
+    });
+
+    it('should update a project', async () => {
+      const created = await appRouter.project.createProject.mutate({
+        input: { name: 'Update Test' },
+        ctx,
+      });
+
+      const updated = await appRouter.project.updateProject.mutate({
+        input: {
+          id: created.id,
+          name: 'Updated Test',
+          description: 'Updated description',
+        },
+        ctx,
+      });
+
+      expect(updated.name).toBe('Updated Test');
+      expect(updated.description).toBe('Updated description');
+    });
+
+    it('should delete a project', async () => {
+      const created = await appRouter.project.createProject.mutate({
+        input: { name: 'Delete Test' },
+        ctx,
+      });
+
+      const result = await appRouter.project.deleteProject.mutate({
+        input: { id: created.id },
+        ctx,
+      });
+
+      expect(result).toEqual({ success: true });
+    });
+  });
+
+  describe('Character CRUD', () => {
+    let projectId: string;
+
+    beforeEach(async () => {
+      const project = await appRouter.project.createProject.mutate({
+        input: { name: 'Character Test Project' },
+        ctx,
+      });
+      projectId = project.id;
+    });
+
+    it('should create a character', async () => {
+      const character = await appRouter.project.createCharacter.mutate({
+        input: {
+          name: 'John Doe',
+          description: 'Main character',
+          projectId,
+        },
+        ctx,
+      });
+
+      expect(character).toMatchObject({
+        name: 'John Doe',
+        description: 'Main character',
+        projectId,
+      });
+    });
+
+    it('should list characters for a project', async () => {
+      await appRouter.project.createCharacter.mutate({
+        input: { name: 'Char 1', projectId },
+        ctx,
+      });
+
+      const characters = await appRouter.project.listCharacters.query({
+        input: { projectId },
+        ctx,
+      });
+
+      expect(characters.length).toBeGreaterThan(0);
+    });
+  });
+
+  describe('Scene CRUD', () => {
+    let projectId: string;
+
+    beforeEach(async () => {
+      const project = await appRouter.project.createProject.mutate({
+        input: { name: 'Scene Test Project' },
+        ctx,
+      });
+      projectId = project.id;
+    });
+
+    it('should create a scene', async () => {
+      const scene = await appRouter.project.createScene.mutate({
+        input: {
+          title: 'INT. OFFICE - DAY',
+          content: 'John sits at his desk.',
+          projectId,
+          order: 1,
+        },
+        ctx,
+      });
+
+      expect(scene).toMatchObject({
+        title: 'INT. OFFICE - DAY',
+        content: 'John sits at his desk.',
+        projectId,
+        order: 1,
+      });
+    });
+
+    it('should list scenes for a project', async () => {
+      await appRouter.project.createScene.mutate({
+        input: { title: 'Scene 1', projectId, order: 1 },
+        ctx,
+      });
+
+      const scenes = await appRouter.project.listScenes.query({
+        input: { projectId },
+        ctx,
+      });
+
+      expect(scenes.length).toBeGreaterThan(0);
+    });
+
+    it('should update scene order', async () => {
+      const scene = await appRouter.project.createScene.mutate({
+        input: { title: 'Reorder Scene', projectId, order: 1 },
+        ctx,
+      });
+
+      const updated = await appRouter.project.updateScene.mutate({
+        input: { id: scene.id, order: 5 },
+        ctx,
+      });
+
+      expect(updated.order).toBe(5);
+    });
+  });
+
+  describe('Error Handling', () => {
+    it('should throw error when getting non-existent project', async () => {
+      await expect(
+        appRouter.project.getProject.query({
+          input: { id: '00000000-0000-0000-0000-000000000000' },
+          ctx,
+        })
+      ).rejects.toThrow('not found');
+    });
+
+    it('should throw error when deleting non-existent project', async () => {
+      const result = await appRouter.project.deleteProject.mutate({
+        input: { id: '00000000-0000-0000-0000-000000000000' },
+        ctx,
+      });
+
+      expect(result).toEqual({ success: false });
+    });
+  });
+});
diff --git a/server/trpc/project-router.ts b/server/trpc/project-router.ts
new file mode 100644
index 000000000..7c2b83ad4
--- /dev/null
+++ b/server/trpc/project-router.ts
@@ -0,0 +1,482 @@
+import { publicProcedure, protectedProcedure, projectProcedure } from './router';
+import { z } from 'zod';
+import type { Project, Character, Scene, CharacterRelationship, CharacterStats } from '../types/project';
+
+// In-memory storage (replace with database later)
+const projects: Map<string, Project> = new Map();
+const characters: Map<string, Character> = new Map();
+const characterRelationships: Map<string, CharacterRelationship> = new Map();
+const scenes: Map<string, Scene> = new Map();
+
+// Helpers
+function slugify(name: string): string {
+  return name.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '');
+}
+
+function findCharacterByProject(characterId: string, projectId: string): Character | undefined {
+  const character = characters.get(characterId);
+  return character?.projectId === projectId ? character : undefined;
+}
+
+function getCharacterStats(characterId: string): CharacterStats {
+  const characterScenes = Array.from(scenes.values())
+    .filter(s => s.projectId === characters.get(characterId)?.projectId);
+  const characterRels = Array.from(characterRelationships.values())
+    .filter(r => r.characterIdA === characterId || r.characterIdB === characterId);
+
+  let totalDialogueLines = 0;
+  let totalScreenTime = 0;
+  let sceneCount = 0;
+
+  for (const scene of characterScenes) {
+    if (scene.content.toLowerCase().includes(characters.get(characterId)?.name.toLowerCase() || '')) {
+      sceneCount++;
+      const dialogueMatches = scene.content.match(/^[A-Z][A-Z\s,.-]+:/gm);
+      if (dialogueMatches) {
+        totalDialogueLines += dialogueMatches.length;
+      }
+      totalScreenTime += Math.ceil(scene.content.split('\n').length / 15);
+    }
+  }
+
+  return {
+    characterId,
+    totalScreenTime,
+    totalDialogueLines,
+    sceneCount,
+    relationshipCount: characterRels.length,
+  };
+}
+
+// Character search with filtering
+function searchCharacters(projectId: string, query?: string, role?: string, arcType?: string): Character[] {
+  let results = Array.from(characters.values())
+    .filter(c => c.projectId === projectId);
+
+  if (query) {
+    const q = query.toLowerCase();
+    results = results.filter(c =>
+      c.name.toLowerCase().includes(q) ||
+      c.description?.toLowerCase().includes(q) ||
+      c.bio?.toLowerCase().includes(q) ||
+      c.traits?.toLowerCase().includes(q) ||
+      c.motivation?.toLowerCase().includes(q)
+    );
+  }
+
+  if (role) {
+    results = results.filter(c => c.role === role);
+  }
+
+  if (arcType) {
+    results = results.filter(c => c.arcType === arcType);
+  }
+
+  return results;
+}
+
+export const projectRouter = {
+  // Project procedures
+  listProjects: publicProcedure.query(async ({ ctx }) => {
+      return Array.from(projects.values());
+    }),
+
+    getProject: publicProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .query(async ({ input }) => {
+        const project = projects.get(input.id);
+        if (!project) {
+          throw new Error(`Project ${input.id} not found`);
+        }
+        return project;
+      }),
+
+    createProject: protectedProcedure
+      .input(z.object({
+        name: z.string().min(1).max(255),
+        description: z.string().optional(),
+      }))
+      .mutation(async ({ input, ctx }) => {
+        const project: Project = {
+          id: crypto.randomUUID(),
+          name: input.name,
+          description: input.description,
+          userId: ctx.userId!,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        };
+        projects.set(project.id, project);
+        return project;
+      }),
+
+    updateProject: protectedProcedure
+      .input(z.object({
+        id: z.string().uuid(),
+        name: z.string().min(1).max(255).optional(),
+        description: z.string().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const project = projects.get(input.id);
+        if (!project) {
+          throw new Error(`Project ${input.id} not found`);
+        }
+
+        const updated: Project = {
+          ...project,
+          ...(input.name && { name: input.name }),
+          ...(input.description !== undefined && { description: input.description }),
+          updatedAt: new Date(),
+        };
+
+        projects.set(updated.id, updated);
+        return updated;
+      }),
+
+    deleteProject: protectedProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .mutation(async ({ input }) => {
+        const deleted = projects.delete(input.id);
+        if (!deleted) {
+          throw new Error(`Project ${input.id} not found`);
+        }
+        return { success: true };
+      }),
+
+    // Character CRUD procedures
+    listCharacters: projectProcedure.query(async ({ ctx }) => {
+      return Array.from(characters.values())
+        .filter(char => char.projectId === ctx.projectId);
+    }),
+
+    getCharacter: publicProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .query(async ({ input }) => {
+        const character = characters.get(input.id);
+        if (!character) {
+          throw new Error(`Character ${input.id} not found`);
+        }
+        return character;
+      }),
+
+    createCharacter: protectedProcedure
+      .input(z.object({
+        name: z.string().min(1).max(100),
+        description: z.string().optional(),
+        bio: z.string().optional(),
+        role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+        arc: z.string().optional(),
+        arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+        age: z.number().int().optional(),
+        gender: z.string().optional(),
+        voice: z.string().optional(),
+        traits: z.string().optional(),
+        motivation: z.string().optional(),
+        conflict: z.string().optional(),
+        secret: z.string().optional(),
+        imageUrl: z.string().url().optional(),
+        projectId: z.string().uuid(),
+      }))
+      .mutation(async ({ input }) => {
+        const slug = slugify(input.name);
+        const character: Character = {
+          id: crypto.randomUUID(),
+          name: input.name,
+          slug,
+          description: input.description,
+          bio: input.bio,
+          role: input.role || 'supporting',
+          arc: input.arc,
+          arcType: input.arcType,
+          age: input.age,
+          gender: input.gender,
+          voice: input.voice,
+          traits: input.traits,
+          motivation: input.motivation,
+          conflict: input.conflict,
+          secret: input.secret,
+          imageUrl: input.imageUrl,
+          projectId: input.projectId,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        };
+        characters.set(character.id, character);
+        return character;
+      }),
+
+    updateCharacter: protectedProcedure
+      .input(z.object({
+        id: z.string().uuid(),
+        name: z.string().min(1).max(100).optional(),
+        description: z.string().optional(),
+        bio: z.string().optional(),
+        role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+        arc: z.string().optional(),
+        arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+        age: z.number().int().optional(),
+        gender: z.string().optional(),
+        voice: z.string().optional(),
+        traits: z.string().optional(),
+        motivation: z.string().optional(),
+        conflict: z.string().optional(),
+        secret: z.string().optional(),
+        imageUrl: z.string().url().optional(),
+        projectId: z.string().uuid().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const character = characters.get(input.id);
+        if (!character) {
+          throw new Error(`Character ${input.id} not found`);
+        }
+
+        const updatedName = input.name || character.name;
+        const updated: Character = {
+          ...character,
+          name: updatedName,
+          slug: slugify(updatedName),
+          ...(input.description !== undefined && { description: input.description }),
+          ...(input.bio !== undefined && { bio: input.bio }),
+          ...(input.role && { role: input.role }),
+          ...(input.arc !== undefined && { arc: input.arc }),
+          ...(input.arcType && { arcType: input.arcType }),
+          ...(input.age !== undefined && { age: input.age }),
+          ...(input.gender !== undefined && { gender: input.gender }),
+          ...(input.voice !== undefined && { voice: input.voice }),
+          ...(input.traits !== undefined && { traits: input.traits }),
+          ...(input.motivation !== undefined && { motivation: input.motivation }),
+          ...(input.conflict !== undefined && { conflict: input.conflict }),
+          ...(input.secret !== undefined && { secret: input.secret }),
+          ...(input.imageUrl !== undefined && { imageUrl: input.imageUrl }),
+          ...(input.projectId && { projectId: input.projectId }),
+          updatedAt: new Date(),
+        };
+
+        characters.set(updated.id, updated);
+        return updated;
+      }),
+
+    deleteCharacter: protectedProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .mutation(async ({ input }) => {
+        const character = characters.get(input.id);
+        if (!character) {
+          throw new Error(`Character ${input.id} not found`);
+        }
+
+        // Remove associated relationships
+        for (const [relId, rel] of characterRelationships) {
+          if (rel.characterIdA === input.id || rel.characterIdB === input.id) {
+            characterRelationships.delete(relId);
+          }
+        }
+
+        const deleted = characters.delete(input.id);
+        if (!deleted) {
+          throw new Error(`Character ${input.id} not found`);
+        }
+        return { success: true };
+      }),
+
+    searchCharacters: protectedProcedure
+      .input(z.object({
+        projectId: z.string().uuid(),
+        query: z.string().optional(),
+        role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+        arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+      }))
+      .query(async ({ input }) => {
+        return searchCharacters(input.projectId, input.query, input.role, input.arcType);
+      }),
+
+    getCharacterStats: protectedProcedure
+      .input(z.object({ characterId: z.string().uuid() }))
+      .query(async ({ input }) => {
+        if (!characters.has(input.characterId)) {
+          throw new Error(`Character ${input.characterId} not found`);
+        }
+        return getCharacterStats(input.characterId);
+      }),
+
+    getProjectCharacterStats: projectProcedure
+      .query(async ({ ctx }) => {
+        const projectCharacters = Array.from(characters.values())
+          .filter(c => c.projectId === ctx.projectId);
+        return projectCharacters.map(c => getCharacterStats(c.id));
+      }),
+
+    // Relationship procedures
+    listRelationships: projectProcedure
+      .query(async ({ ctx }) => {
+        const projectCharacterIds = new Set(
+          Array.from(characters.values())
+            .filter(c => c.projectId === ctx.projectId)
+            .map(c => c.id)
+        );
+        return Array.from(characterRelationships.values())
+          .filter(r => projectCharacterIds.has(r.characterIdA) && projectCharacterIds.has(r.characterIdB));
+      }),
+
+    getRelationshipsForCharacter: protectedProcedure
+      .input(z.object({ characterId: z.string().uuid() }))
+      .query(async ({ input }) => {
+        const character = characters.get(input.characterId);
+        if (!character) {
+          throw new Error(`Character ${input.characterId} not found`);
+        }
+        return Array.from(characterRelationships.values())
+          .filter(r => r.characterIdA === input.characterId || r.characterIdB === input.characterId);
+      }),
+
+    createRelationship: protectedProcedure
+      .input(z.object({
+        characterIdA: z.string().uuid(),
+        characterIdB: z.string().uuid(),
+        relationshipType: z.enum(['family', 'romantic', 'friendship', 'rivalry', 'mentor', 'alliance', 'conflict', 'professional', 'other']),
+        description: z.string().optional(),
+        strength: z.number().int().min(0).max(100).optional(),
+        isAntagonistic: z.boolean().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        if (input.characterIdA === input.characterIdB) {
+          throw new Error('Cannot create a relationship with the same character');
+        }
+
+        const charA = characters.get(input.characterIdA);
+        const charB = characters.get(input.characterIdB);
+        if (!charA || !charB) {
+          throw new Error('Both characters must exist');
+        }
+
+        // Check for duplicate relationship
+        const existing = Array.from(characterRelationships.values()).find(
+          r => (r.characterIdA === input.characterIdA && r.characterIdB === input.characterIdB) ||
+               (r.characterIdA === input.characterIdB && r.characterIdB === input.characterIdA)
+        );
+        if (existing) {
+          throw new Error('Relationship already exists between these characters');
+        }
+
+        const relationship: CharacterRelationship = {
+          id: crypto.randomUUID(),
+          characterIdA: input.characterIdA,
+          characterIdB: input.characterIdB,
+          relationshipType: input.relationshipType,
+          description: input.description,
+          strength: input.strength ?? 50,
+          isAntagonistic: input.isAntagonistic ?? false,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        };
+        characterRelationships.set(relationship.id, relationship);
+        return relationship;
+      }),
+
+    updateRelationship: protectedProcedure
+      .input(z.object({
+        id: z.string().uuid(),
+        relationshipType: z.enum(['family', 'romantic', 'friendship', 'rivalry', 'mentor', 'alliance', 'conflict', 'professional', 'other']).optional(),
+        description: z.string().optional(),
+        strength: z.number().int().min(0).max(100).optional(),
+        isAntagonistic: z.boolean().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const relationship = characterRelationships.get(input.id);
+        if (!relationship) {
+          throw new Error(`Relationship ${input.id} not found`);
+        }
+
+        const updated: CharacterRelationship = {
+          ...relationship,
+          ...(input.relationshipType && { relationshipType: input.relationshipType }),
+          ...(input.description !== undefined && { description: input.description }),
+          ...(input.strength !== undefined && { strength: input.strength }),
+          ...(input.isAntagonistic !== undefined && { isAntagonistic: input.isAntagonistic }),
+          updatedAt: new Date(),
+        };
+
+        characterRelationships.set(updated.id, updated);
+        return updated;
+      }),
+
+    deleteRelationship: protectedProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .mutation(async ({ input }) => {
+        const deleted = characterRelationships.delete(input.id);
+        if (!deleted) {
+          throw new Error(`Relationship ${input.id} not found`);
+        }
+        return { success: true };
+      }),
+
+    // Scene procedures
+    listScenes: projectProcedure.query(async ({ ctx }) => {
+      return Array.from(scenes.values())
+        .filter(scene => scene.projectId === ctx.projectId)
+        .sort((a, b) => a.order - b.order);
+    }),
+
+    getScene: publicProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .query(async ({ input }) => {
+        const scene = scenes.get(input.id);
+        if (!scene) {
+          throw new Error(`Scene ${input.id} not found`);
+        }
+        return scene;
+      }),
+
+    createScene: protectedProcedure
+      .input(z.object({
+        title: z.string().min(1),
+        content: z.string().optional(),
+        projectId: z.string().uuid(),
+        order: z.number().int().nonnegative(),
+      }))
+      .mutation(async ({ input }) => {
+        const scene: Scene = {
+          id: crypto.randomUUID(),
+          title: input.title,
+          content: input.content || '',
+          projectId: input.projectId,
+          order: input.order,
+          createdAt: new Date(),
+          updatedAt: new Date(),
+        };
+        scenes.set(scene.id, scene);
+        return scene;
+      }),
+
+    updateScene: protectedProcedure
+      .input(z.object({
+        id: z.string().uuid(),
+        title: z.string().min(1).optional(),
+        content: z.string().optional(),
+        order: z.number().int().nonnegative().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const scene = scenes.get(input.id);
+        if (!scene) {
+          throw new Error(`Scene ${input.id} not found`);
+        }
+
+        const updated: Scene = {
+          ...scene,
+          ...(input.title && { title: input.title }),
+          ...(input.content !== undefined && { content: input.content }),
+          ...(input.order !== undefined && { order: input.order }),
+          updatedAt: new Date(),
+        };
+
+        scenes.set(updated.id, updated);
+        return updated;
+      }),
+
+    deleteScene: protectedProcedure
+      .input(z.object({ id: z.string().uuid() }))
+      .mutation(async ({ input }) => {
+        const deleted = scenes.delete(input.id);
+        if (!deleted) {
+          throw new Error(`Scene ${input.id} not found`);
+        }
+        return { success: true };
+      }),
+};
diff --git a/server/trpc/router.ts b/server/trpc/router.ts
new file mode 100644
index 000000000..ccb2a8d5e
--- /dev/null
+++ b/server/trpc/router.ts
@@ -0,0 +1,41 @@
+import { initTRPC, TRPCError } from '@trpc/server';
+import { z } from 'zod';
+import type { TRPCContext } from './types';
+
+// Initialize tRPC with context
+const t = initTRPC.context<TRPCContext>().create();
+
+// Middleware for authentication
+const isAuthenticated = t.middleware(({ ctx, next }) => {
+  if (!ctx.userId) {
+    throw new TRPCError({ code: 'UNAUTHORIZED', message: 'User not authenticated' });
+  }
+  return next({ ctx: { ...ctx, userId: ctx.userId } });
+});
+
+// Middleware for project authorization
+const hasProjectAccess = t.middleware(({ ctx, next }) => {
+  const projectId = ctx.projectId;
+  if (!projectId) {
+    throw new TRPCError({ code: 'FORBIDDEN', message: 'Project access required' });
+  }
+  return next({ ctx: { ...ctx, projectId } });
+});
+
+// Base router
+export const baseRouter = t.router;
+
+// Procedure builders
+export const publicProcedure = t.procedure;
+export const protectedProcedure = t.procedure.use(isAuthenticated);
+export const projectProcedure = t.procedure.use(hasProjectAccess);
+
+// Validation middleware
+export const validateInput = <T extends z.ZodTypeAny>(schema: T) => {
+  return t.middleware(({ input, next }) => {
+    const validated = schema.parse(input);
+    return next({ input: validated });
+  });
+};
+
+export { t, TRPCError };
diff --git a/server/trpc/types.ts b/server/trpc/types.ts
new file mode 100644
index 000000000..cede72b7a
--- /dev/null
+++ b/server/trpc/types.ts
@@ -0,0 +1,172 @@
+import { z } from 'zod';
+
+// Base types
+export const ProjectSchema = z.object({
+  id: z.string().uuid(),
+  name: z.string().min(1).max(255),
+  description: z.string().optional(),
+  userId: z.string().uuid(),
+  createdAt: z.date(),
+  updatedAt: z.date(),
+});
+
+export const CharacterSchema = z.object({
+  id: z.string().uuid(),
+  name: z.string().min(1).max(100),
+  slug: z.string(),
+  description: z.string().optional(),
+  bio: z.string().optional(),
+  role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+  arc: z.string().optional(),
+  arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+  age: z.number().int().optional(),
+  gender: z.string().optional(),
+  voice: z.string().optional(),
+  traits: z.string().optional(),
+  motivation: z.string().optional(),
+  conflict: z.string().optional(),
+  secret: z.string().optional(),
+  imageUrl: z.string().url().optional(),
+  projectId: z.string().uuid(),
+  createdAt: z.date(),
+  updatedAt: z.date(),
+});
+
+export const CharacterRelationshipSchema = z.object({
+  id: z.string().uuid(),
+  characterIdA: z.string().uuid(),
+  characterIdB: z.string().uuid(),
+  relationshipType: z.enum(['family', 'romantic', 'friendship', 'rivalry', 'mentor', 'alliance', 'conflict', 'professional', 'other']),
+  description: z.string().optional(),
+  strength: z.number().int().min(0).max(100),
+  isAntagonistic: z.boolean(),
+  createdAt: z.date(),
+  updatedAt: z.date(),
+});
+
+export const CharacterStatsSchema = z.object({
+  characterId: z.string().uuid(),
+  totalScreenTime: z.number().int(),
+  totalDialogueLines: z.number().int(),
+  sceneCount: z.number().int(),
+  relationshipCount: z.number().int(),
+});
+
+export const SceneSchema = z.object({
+  id: z.string().uuid(),
+  title: z.string().min(1),
+  content: z.string(),
+  projectId: z.string().uuid(),
+  order: z.number().int().nonnegative(),
+  createdAt: z.date(),
+  updatedAt: z.date(),
+});
+
+export const ScriptVersionSchema = z.object({
+  id: z.string().uuid(),
+  projectId: z.string().uuid(),
+  content: z.string(),
+  version: z.number().int().positive(),
+  authorId: z.string().uuid().optional(),
+  createdAt: z.date(),
+});
+
+// Input schemas
+export const CreateProjectInputSchema = z.object({
+  name: z.string().min(1).max(255),
+  description: z.string().optional(),
+});
+
+export const UpdateProjectInputSchema = z.object({
+  id: z.string().uuid(),
+  name: z.string().min(1).max(255).optional(),
+  description: z.string().optional(),
+});
+
+export const CreateCharacterInputSchema = z.object({
+  name: z.string().min(1).max(100),
+  description: z.string().optional(),
+  bio: z.string().optional(),
+  role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+  arc: z.string().optional(),
+  arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+  age: z.number().int().optional(),
+  gender: z.string().optional(),
+  voice: z.string().optional(),
+  traits: z.string().optional(),
+  motivation: z.string().optional(),
+  conflict: z.string().optional(),
+  secret: z.string().optional(),
+  imageUrl: z.string().url().optional(),
+  projectId: z.string().uuid(),
+});
+
+export const UpdateCharacterInputSchema = z.object({
+  id: z.string().uuid(),
+  name: z.string().min(1).max(100).optional(),
+  description: z.string().optional(),
+  bio: z.string().optional(),
+  role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+  arc: z.string().optional(),
+  arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+  age: z.number().int().optional(),
+  gender: z.string().optional(),
+  voice: z.string().optional(),
+  traits: z.string().optional(),
+  motivation: z.string().optional(),
+  conflict: z.string().optional(),
+  secret: z.string().optional(),
+  imageUrl: z.string().url().optional(),
+  projectId: z.string().uuid().optional(),
+});
+
+export const CreateRelationshipInputSchema = z.object({
+  characterIdA: z.string().uuid(),
+  characterIdB: z.string().uuid(),
+  relationshipType: z.enum(['family', 'romantic', 'friendship', 'rivalry', 'mentor', 'alliance', 'conflict', 'professional', 'other']),
+  description: z.string().optional(),
+  strength: z.number().int().min(0).max(100).optional(),
+  isAntagonistic: z.boolean().optional(),
+});
+
+export const UpdateRelationshipInputSchema = z.object({
+  id: z.string().uuid(),
+  relationshipType: z.enum(['family', 'romantic', 'friendship', 'rivalry', 'mentor', 'alliance', 'conflict', 'professional', 'other']).optional(),
+  description: z.string().optional(),
+  strength: z.number().int().min(0).max(100).optional(),
+  isAntagonistic: z.boolean().optional(),
+});
+
+export const SearchCharactersInputSchema = z.object({
+  projectId: z.string().uuid(),
+  query: z.string().optional(),
+  role: z.enum(['protagonist', 'antagonist', 'supporting', 'background', 'ensemble']).optional(),
+  arcType: z.enum(['positive', 'negative', 'flat', 'complex']).optional(),
+});
+
+export const CreateSceneInputSchema = z.object({
+  title: z.string().min(1),
+  content: z.string().optional(),
+  projectId: z.string().uuid(),
+  order: z.number().int().nonnegative(),
+});
+
+export const UpdateSceneInputSchema = z.object({
+  id: z.string().uuid(),
+  title: z.string().min(1).optional(),
+  content: z.string().optional(),
+  order: z.number().int().nonnegative().optional(),
+});
+
+// Response schemas
+export const ProjectListSchema = z.array(ProjectSchema);
+export const CharacterListSchema = z.array(CharacterSchema);
+export const CharacterRelationshipListSchema = z.array(CharacterRelationshipSchema);
+export const CharacterStatsListSchema = z.array(CharacterStatsSchema);
+export const SceneListSchema = z.array(SceneSchema);
+
+// Auth context
+export interface TRPCContext {
+  userId?: string;
+  projectId?: string;
+}
diff --git a/server/types/project.ts b/server/types/project.ts
new file mode 100644
index 000000000..d1e85c57e
--- /dev/null
+++ b/server/types/project.ts
@@ -0,0 +1,35 @@
+import type { z } from 'zod';
+import {
+  ProjectSchema,
+  CharacterSchema,
+  CharacterRelationshipSchema,
+  CharacterStatsSchema,
+  SceneSchema,
+  ScriptVersionSchema,
+  CreateProjectInputSchema,
+  UpdateProjectInputSchema,
+  CreateCharacterInputSchema,
+  UpdateCharacterInputSchema,
+  CreateRelationshipInputSchema,
+  UpdateRelationshipInputSchema,
+  SearchCharactersInputSchema,
+  CreateSceneInputSchema,
+  UpdateSceneInputSchema,
+} from '../trpc/types';
+
+export type Project = z.infer<typeof ProjectSchema>;
+export type Character = z.infer<typeof CharacterSchema>;
+export type CharacterRelationship = z.infer<typeof CharacterRelationshipSchema>;
+export type CharacterStats = z.infer<typeof CharacterStatsSchema>;
+export type Scene = z.infer<typeof SceneSchema>;
+export type ScriptVersion = z.infer<typeof ScriptVersionSchema>;
+
+export type CreateProjectInput = z.infer<typeof CreateProjectInputSchema>;
+export type UpdateProjectInput = z.infer<typeof UpdateProjectInputSchema>;
+export type CreateCharacterInput = z.infer<typeof CreateCharacterInputSchema>;
+export type UpdateCharacterInput = z.infer<typeof UpdateCharacterInputSchema>;
+export type CreateRelationshipInput = z.infer<typeof CreateRelationshipInputSchema>;
+export type UpdateRelationshipInput = z.infer<typeof UpdateRelationshipInputSchema>;
+export type SearchCharactersInput = z.infer<typeof SearchCharactersInputSchema>;
+export type CreateSceneInput = z.infer<typeof CreateSceneInputSchema>;
+export type UpdateSceneInput = z.infer<typeof UpdateSceneInputSchema>;
diff --git a/src/components/characters/CharacterCard.tsx b/src/components/characters/CharacterCard.tsx
new file mode 100644
index 000000000..cec1e3af3
--- /dev/null
+++ b/src/components/characters/CharacterCard.tsx
@@ -0,0 +1,64 @@
+import { Component, For, Show } from 'solid-js';
+import type { Character } from '../../../../server/types/project';
+
+export interface CharacterCardProps {
+  character: Character;
+  onSelect?: (character: Character) => void;
+  compact?: boolean;
+}
+
+const roleColors: Record<string, string> = {
+  protagonist: '#4CAF50',
+  antagonist: '#F44336',
+  supporting: '#2196F3',
+  background: '#9E9E9E',
+  ensemble: '#9C27B0',
+};
+
+export const CharacterCard: Component<CharacterCardProps> = (props) => {
+  const handleClick = () => {
+    props.onSelect?.(props.character);
+  };
+
+  return (
+    <div
+      class="character-card"
+      classList={{ 'character-card--compact': props.compact }}
+      onClick={handleClick}
+      role="button"
+      tabindex={0}
+    >
+      <div class="character-card__header">
+        <Show when={props.character.imageUrl}>
+          <img
+            src={props.character.imageUrl}
+            alt={props.character.name}
+            class="character-card__avatar"
+          />
+        </Show>
+        <Show when={!props.character.imageUrl}>
+          <div class="character-card__avatar character-card__avatar--placeholder">
+            {props.character.name.charAt(0).toUpperCase()}
+          </div>
+        </Show>
+        <div class="character-card__info">
+          <h3 class="character-card__name">{props.character.name}</h3>
+          <span
+            class="character-card__role"
+            style={{ 'background-color': roleColors[props.character.role || 'supporting'] || '#9E9E9E' }}
+          >
+            {props.character.role}
+          </span>
+        </div>
+      </div>
+      <Show when={!props.compact && props.character.bio}>
+        <p class="character-card__bio">{props.character.bio}</p>
+      </Show>
+      <Show when={!props.compact && props.character.traits}>
+        <div class="character-card__traits">
+          <strong>Traits:</strong> {props.character.traits}
+        </div>
+      </Show>
+    </div>
+  );
+};
diff --git a/src/components/characters/CharacterList.tsx b/src/components/characters/CharacterList.tsx
new file mode 100644
index 000000000..ef34810da
--- /dev/null
+++ b/src/components/characters/CharacterList.tsx
@@ -0,0 +1,173 @@
+import { Component, createSignal, For, Show } from 'solid-js';
+import {
+  useCharacters,
+  useCreateCharacter,
+  useUpdateCharacter,
+  useDeleteCharacter,
+} from '../../../lib/api/trpc-hooks';
+import { CharacterCard } from './CharacterCard';
+import { CharacterProfile } from './CharacterProfile';
+import type { Character } from '../../../../server/types/project';
+
+export interface CharacterListProps {
+  projectId: string;
+}
+
+export const CharacterList: Component<CharacterListProps> = (props) => {
+  const charactersQuery = useCharacters(props.projectId);
+  const createCharacter = useCreateCharacter();
+  const [selectedCharacter, setSelectedCharacter] = createSignal<Character | null>(null);
+  const [showForm, setShowForm] = createSignal(false);
+
+  const [formData, setFormData] = createSignal({
+    name: '',
+    description: '',
+    bio: '',
+    role: 'supporting' as 'protagonist' | 'antagonist' | 'supporting' | 'background' | 'ensemble',
+    arc: '',
+    arcType: undefined as 'positive' | 'negative' | 'flat' | 'complex' | undefined,
+    age: undefined as number | undefined,
+    gender: '',
+    voice: '',
+    traits: '',
+    motivation: '',
+    conflict: '',
+    secret: '',
+  });
+
+  const handleCreate = async () => {
+    if (!formData().name.trim()) return;
+    await createCharacter.mutateAsync({
+      ...formData(),
+      projectId: props.projectId,
+    });
+    setShowForm(false);
+    setFormData({
+      name: '',
+      description: '',
+      bio: '',
+      role: 'supporting',
+      arc: '',
+      arcType: undefined,
+      age: undefined,
+      gender: '',
+      voice: '',
+      traits: '',
+      motivation: '',
+      conflict: '',
+      secret: '',
+    });
+  };
+
+  return (
+    <div class="character-list">
+      <div class="character-list__header">
+        <h2>Characters</h2>
+        <button onClick={() => setShowForm(!showForm())} class="add-character-btn">
+          {showForm() ? 'Cancel' : '+ Add Character'}
+        </button>
+      </div>
+
+      <Show when={showForm()}>
+        <div class="character-form">
+          <div class="form-row">
+            <input
+              type="text"
+              placeholder="Name *"
+              value={formData().name}
+              onInput={(e) => setFormData({ ...formData(), name: e.currentTarget.value })}
+              required
+            />
+            <select
+              value={formData().role}
+              onChange={(e) => setFormData({ ...formData(), role: e.currentTarget.value as Character['role'] })}
+            >
+              <option value="protagonist">Protagonist</option>
+              <option value="antagonist">Antagonist</option>
+              <option value="supporting">Supporting</option>
+              <option value="background">Background</option>
+              <option value="ensemble">Ensemble</option>
+            </select>
+          </div>
+          <textarea
+            placeholder="Bio"
+            value={formData().bio}
+            onInput={(e) => setFormData({ ...formData(), bio: e.currentTarget.value })}
+          />
+          <textarea
+            placeholder="Description"
+            value={formData().description}
+            onInput={(e) => setFormData({ ...formData(), description: e.currentTarget.value })}
+          />
+          <div class="form-row">
+            <input
+              type="text"
+              placeholder="Traits (comma-separated)"
+              value={formData().traits}
+              onInput={(e) => setFormData({ ...formData(), traits: e.currentTarget.value })}
+            />
+            <input
+              type="text"
+              placeholder="Voice description"
+              value={formData().voice}
+              onInput={(e) => setFormData({ ...formData(), voice: e.currentTarget.value })}
+            />
+          </div>
+          <div class="form-row">
+            <input
+              type="text"
+              placeholder="Motivation"
+              value={formData().motivation}
+              onInput={(e) => setFormData({ ...formData(), motivation: e.currentTarget.value })}
+            />
+            <input
+              type="text"
+              placeholder="Conflict"
+              value={formData().conflict}
+              onInput={(e) => setFormData({ ...formData(), conflict: e.currentTarget.value })}
+            />
+          </div>
+          <textarea
+            placeholder="Character arc"
+            value={formData().arc}
+            onInput={(e) => setFormData({ ...formData(), arc: e.currentTarget.value })}
+          />
+          <select
+            value={formData().arcType || ''}
+            onChange={(e) => setFormData({ ...formData(), arcType: e.currentTarget.value as Character['arcType'] || undefined })}
+          >
+            <option value="">No arc type</option>
+            <option value="positive">Positive Arc</option>
+            <option value="negative">Negative Arc</option>
+            <option value="flat">Flat Arc</option>
+            <option value="complex">Complex Arc</option>
+          </select>
+          <input
+            type="button"
+            value="Create Character"
+            onClick={handleCreate}
+            class="create-btn"
+          />
+        </div>
+      </Show>
+
+      <div class="character-grid">
+        <For each={charactersQuery.data()}>
+          {(character) => (
+            <CharacterCard
+              character={character}
+              onSelect={setSelectedCharacter}
+            />
+          )}
+        </For>
+      </div>
+
+      <Show when={selectedCharacter()}>
+        <CharacterProfile
+          character={selectedCharacter()!}
+          onClose={() => setSelectedCharacter(null)}
+        />
+      </Show>
+    </div>
+  );
+};
diff --git a/src/components/characters/CharacterProfile.tsx b/src/components/characters/CharacterProfile.tsx
new file mode 100644
index 000000000..792f5611e
--- /dev/null
+++ b/src/components/characters/CharacterProfile.tsx
@@ -0,0 +1,143 @@
+import { Component, createSignal, Show } from 'solid-js';
+import { useCharacterStats, useUpdateCharacter, useDeleteCharacter } from '../../../lib/api/trpc-hooks';
+import { CharacterRelationships } from './CharacterRelationships';
+import type { Character } from '../../../../server/types/project';
+
+export interface CharacterProfileProps {
+  character: Character;
+  onClose?: () => void;
+}
+
+export const CharacterProfile: Component<CharacterProfileProps> = (props) => {
+  const stats = useCharacterStats(props.character.id);
+  const updateCharacter = useUpdateCharacter();
+  const deleteCharacter = useDeleteCharacter();
+  const [editing, setEditing] = createSignal(false);
+  const [editData, setEditData] = createSignal(props.character);
+
+  const handleSave = async () => {
+    await updateCharacter.mutateAsync(editData());
+    setEditing(false);
+  };
+
+  const handleDelete = async () => {
+    await deleteCharacter.mutateAsync(props.character.id);
+    props.onClose?.();
+  };
+
+  return (
+    <div class="character-profile" role="dialog" aria-label={`Profile of ${props.character.name}`}>
+      <div class="character-profile__header">
+        <Show when={props.character.imageUrl}>
+          <img src={props.character.imageUrl} alt={props.character.name} class="character-profile__image" />
+        </Show>
+        <div class="character-profile__header-info">
+          <Show when={!editing()}>
+            <h2>{props.character.name}</h2>
+          </Show>
+          <Show when={editing()}>
+            <input
+              type="text"
+              value={editData().name}
+              onInput={(e) => setEditData({ ...editData(), name: e.currentTarget.value })}
+            />
+          </Show>
+          <span class="character-profile__role">{props.character.role}</span>
+        </div>
+        <div class="character-profile__actions">
+          <button onClick={() => setEditing(!editing())} class="edit-btn">
+            {editing() ? 'Discard' : 'Edit'}
+          </button>
+          <button onClick={props.onClose} class="close-btn">&times;</button>
+        </div>
+      </div>
+
+      <div class="character-profile__body">
+        <div class="character-profile__sections">
+          <section class="profile-section">
+            <h3>Bio</h3>
+            <Show when={!editing()}>
+              <p>{props.character.bio || 'No bio yet.'}</p>
+            </Show>
+            <Show when={editing()}>
+              <textarea
+                value={editData().bio || ''}
+                onInput={(e) => setEditData({ ...editData(), bio: e.currentTarget.value })}
+              />
+            </Show>
+          </section>
+
+          <section class="profile-section">
+            <h3>Character Arc</h3>
+            <Show when={props.character.arcType}>
+              <span class="arc-type-badge">{props.character.arcType} arc</span>
+            </Show>
+            <Show when={!editing()}>
+              <p>{props.character.arc || 'No arc defined.'}</p>
+            </Show>
+            <Show when={editing()}>
+              <textarea
+                value={editData().arc || ''}
+                onInput={(e) => setEditData({ ...editData(), arc: e.currentTarget.value })}
+              />
+            </Show>
+          </section>
+
+          <section class="profile-section">
+            <h3>Traits & Voice</h3>
+            <Show when={props.character.traits}>
+              <p><strong>Traits:</strong> {props.character.traits}</p>
+            </Show>
+            <Show when={props.character.voice}>
+              <p><strong>Voice:</strong> {props.character.voice}</p>
+            </Show>
+          </section>
+
+          <section class="profile-section">
+            <h3>Motivation & Conflict</h3>
+            <Show when={props.character.motivation}>
+              <p><strong>Motivation:</strong> {props.character.motivation}</p>
+            </Show>
+            <Show when={props.character.conflict}>
+              <p><strong>Conflict:</strong> {props.character.conflict}</p>
+            </Show>
+            <Show when={props.character.secret}>
+              <p><strong>Secret:</strong> {props.character.secret}</p>
+            </Show>
+          </section>
+
+          <section class="profile-section">
+            <h3>Statistics</h3>
+            <div class="stats-grid">
+              <div class="stat-item">
+                <span class="stat-value">{stats.data()?.sceneCount || 0}</span>
+                <span class="stat-label">Scenes</span>
+              </div>
+              <div class="stat-item">
+                <span class="stat-value">{stats.data()?.totalDialogueLines || 0}</span>
+                <span class="stat-label">Dialogue Lines</span>
+              </div>
+              <div class="stat-item">
+                <span class="stat-value">{stats.data()?.totalScreenTime || 0}</span>
+                <span class="stat-label">Screen Time (est. min)</span>
+              </div>
+              <div class="stat-item">
+                <span class="stat-value">{stats.data()?.relationshipCount || 0}</span>
+                <span class="stat-label">Relationships</span>
+              </div>
+            </div>
+          </section>
+        </div>
+
+        <CharacterRelationships characterId={props.character.id} />
+      </div>
+
+      <Show when={editing()}>
+        <div class="character-profile__footer">
+          <button onClick={handleSave} class="save-btn">Save Changes</button>
+          <button onClick={handleDelete} class="delete-btn">Delete Character</button>
+        </div>
+      </Show>
+    </div>
+  );
+};
diff --git a/src/components/characters/CharacterRelationships.tsx b/src/components/characters/CharacterRelationships.tsx
new file mode 100644
index 000000000..6e49bec58
--- /dev/null
+++ b/src/components/characters/CharacterRelationships.tsx
@@ -0,0 +1,136 @@
+import { Component, createSignal, For, Show } from 'solid-js';
+import {
+  useCharacterRelationships,
+  useCreateRelationship,
+  useUpdateRelationship,
+  useDeleteRelationship,
+} from '../../../lib/api/trpc-hooks';
+import type { CharacterRelationship } from '../../../../server/types/project';
+
+export interface CharacterRelationshipsProps {
+  characterId: string;
+}
+
+const relationshipLabels: Record<string, string> = {
+  family: '👨‍👩‍👧‍👦 Family',
+  romantic: '❤️ Romantic',
+  friendship: '🤝 Friendship',
+  rivalry: '⚔️ Rivalry',
+  mentor: '🎓 Mentor',
+  alliance: '🤝 Alliance',
+  conflict: '💥 Conflict',
+  professional: '💼 Professional',
+  other: '📌 Other',
+};
+
+export const CharacterRelationships: Component<CharacterRelationshipsProps> = (props) => {
+  const relationships = useCharacterRelationships(props.characterId);
+  const createRelationship = useCreateRelationship();
+  const deleteRelationship = useDeleteRelationship();
+  const [showForm, setShowForm] = createSignal(false);
+  const [newRel, setNewRel] = createSignal({
+    characterIdB: '',
+    relationshipType: 'friendship' as CharacterRelationship['relationshipType'],
+    description: '',
+    strength: 50,
+    isAntagonistic: false,
+  });
+
+  const handleCreate = async () => {
+    if (!newRel().characterIdB) return;
+    await createRelationship.mutateAsync({
+      characterIdA: props.characterId,
+      ...newRel(),
+    });
+    setShowForm(false);
+    setNewRel({
+      characterIdB: '',
+      relationshipType: 'friendship',
+      description: '',
+      strength: 50,
+      isAntagonistic: false,
+    });
+  };
+
+  return (
+    <div class="character-relationships">
+      <div class="relationships-header">
+        <h3>Relationships</h3>
+        <button onClick={() => setShowForm(!showForm())} class="add-relationship-btn">
+          {showForm() ? 'Cancel' : '+ Add Relationship'}
+        </button>
+      </div>
+
+      <Show when={showForm()}>
+        <div class="relationship-form">
+          <input
+            type="text"
+            placeholder="Other character ID"
+            value={newRel().characterIdB}
+            onInput={(e) => setNewRel({ ...newRel(), characterIdB: e.currentTarget.value })}
+          />
+          <select
+            value={newRel().relationshipType}
+            onChange={(e) => setNewRel({ ...newRel(), relationshipType: e.currentTarget.value as CharacterRelationship['relationshipType'] })}
+          >
+            <For each={Object.entries(relationshipLabels)}>
+              {([key, label]) => (
+                <option value={key}>{label}</option>
+              )}
+            </For>
+          </select>
+          <input
+            type="range"
+            min="0"
+            max="100"
+            value={newRel().strength}
+            onChange={(e) => setNewRel({ ...newRel(), strength: parseInt(e.currentTarget.value) })}
+          />
+          <label>
+            <input
+              type="checkbox"
+              checked={newRel().isAntagonistic}
+              onChange={(e) => setNewRel({ ...newRel(), isAntagonistic: e.currentTarget.checked })}
+            />
+            Antagonistic
+          </label>
+          <textarea
+            placeholder="Description"
+            value={newRel().description}
+            onInput={(e) => setNewRel({ ...newRel(), description: e.currentTarget.value })}
+          />
+          <button onClick={handleCreate} class="create-relationship-btn">Create</button>
+        </div>
+      </Show>
+
+      <div class="relationship-list">
+        <For each={relationships.data()}>
+          {(rel) => (
+            <div class={`relationship-item ${rel.isAntagonistic ? 'antagonistic' : 'positive'}`}>
+              <div class="relationship-info">
+                <span class="relationship-type">{relationshipLabels[rel.relationshipType]}</span>
+                <span class="relationship-strength">
+                  Strength: {rel.strength}%
+                </span>
+              </div>
+              <div class="relationship-detail">
+                <Show when={rel.description}>
+                  <span>{rel.description}</span>
+                </Show>
+              </div>
+              <button
+                onClick={() => deleteRelationship.mutateAsync(rel.id)}
+                class="delete-relationship-btn"
+              >
+                Remove
+              </button>
+            </div>
+          )}
+        </For>
+        <Show when={!relationships.data() || relationships.data()!.length === 0}>
+          <div class="no-relationships">No relationships defined yet.</div>
+        </Show>
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/characters/CharacterSearch.tsx b/src/components/characters/CharacterSearch.tsx
new file mode 100644
index 000000000..762513e12
--- /dev/null
+++ b/src/components/characters/CharacterSearch.tsx
@@ -0,0 +1,71 @@
+import { Component, createSignal, For, Show } from 'solid-js';
+import { useSearchCharacters } from '../../../lib/api/trpc-hooks';
+import { CharacterCard } from './CharacterCard';
+import type { Character } from '../../../../server/types/project';
+
+export interface CharacterSearchProps {
+  projectId: string;
+  onCharacterSelect?: (character: Character) => void;
+}
+
+export const CharacterSearch: Component<CharacterSearchProps> = (props) => {
+  const [query, setQuery] = createSignal('');
+  const [role, setRole] = createSignal<string>('');
+  const [arcType, setArcType] = createSignal<string>('');
+  const results = useSearchCharacters(props.projectId, query, role, arcType);
+
+  const handleSearch = () => {
+    results.refetch();
+  };
+
+  const handleClear = () => {
+    setQuery('');
+    setRole('');
+    setArcType('');
+  };
+
+  return (
+    <div class="character-search">
+      <div class="search-controls">
+        <input
+          type="text"
+          placeholder="Search characters by name, bio, traits..."
+          value={query()}
+          onInput={(e) => setQuery(e.currentTarget.value)}
+          onKeyDown={(e) => e.key === 'Enter' && handleSearch()}
+          class="search-input"
+        />
+        <select value={role()} onChange={(e) => setRole(e.currentTarget.value)} class="filter-select">
+          <option value="">All Roles</option>
+          <option value="protagonist">Protagonist</option>
+          <option value="antagonist">Antagonist</option>
+          <option value="supporting">Supporting</option>
+          <option value="background">Background</option>
+          <option value="ensemble">Ensemble</option>
+        </select>
+        <select value={arcType()} onChange={(e) => setArcType(e.currentTarget.value)} class="filter-select">
+          <option value="">All Arcs</option>
+          <option value="positive">Positive Arc</option>
+          <option value="negative">Negative Arc</option>
+          <option value="flat">Flat Arc</option>
+          <option value="complex">Complex Arc</option>
+        </select>
+        <button onClick={handleSearch} class="search-btn">Search</button>
+        <button onClick={handleClear} class="clear-btn">Clear</button>
+      </div>
+      <div class="search-results">
+        <For each={results.data()}>
+          {(character) => (
+            <CharacterCard
+              character={character}
+              onSelect={props.onCharacterSelect}
+            />
+          )}
+        </For>
+        <Show when={!results.data() || results.data()!.length === 0}>
+          <div class="no-results">No characters found</div>
+        </Show>
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/characters/CharacterStatsPanel.tsx b/src/components/characters/CharacterStatsPanel.tsx
new file mode 100644
index 000000000..b0e2124c4
--- /dev/null
+++ b/src/components/characters/CharacterStatsPanel.tsx
@@ -0,0 +1,54 @@
+import { Component, createMemo, For, Show } from 'solid-js';
+import { useProjectCharacterStats, useCharacters } from '../../../lib/api/trpc-hooks';
+
+export interface CharacterStatsPanelProps {
+  projectId: string;
+}
+
+export const CharacterStatsPanel: Component<CharacterStatsPanelProps> = (props) => {
+  const stats = useProjectCharacterStats(props.projectId);
+  const characters = useCharacters(props.projectId);
+
+  const characterMap = createMemo(() => {
+    const map = new Map<string, string>();
+    characters.data()?.forEach(c => map.set(c.id, c.name));
+    return map;
+  });
+
+  return (
+    <div class="character-stats-panel">
+      <h3>Character Statistics</h3>
+      <Show when={stats.data() && stats.data()!.length > 0}>
+        <div class="stats-table-container">
+          <table class="stats-table">
+            <thead>
+              <tr>
+                <th>Character</th>
+                <th>Scenes</th>
+                <th>Dialogue Lines</th>
+                <th>Screen Time</th>
+                <th>Relationships</th>
+              </tr>
+            </thead>
+            <tbody>
+              <For each={stats.data()}>
+                {(stat) => (
+                  <tr>
+                    <td>{characterMap().get(stat.characterId) || stat.characterId}</td>
+                    <td>{stat.sceneCount}</td>
+                    <td>{stat.totalDialogueLines}</td>
+                    <td>{stat.totalScreenTime} min</td>
+                    <td>{stat.relationshipCount}</td>
+                  </tr>
+                )}
+              </For>
+            </tbody>
+          </table>
+        </div>
+      </Show>
+      <Show when={!stats.data() || stats.data()!.length === 0}>
+        <div class="no-stats">No statistics available.</div>
+      </Show>
+    </div>
+  );
+};
diff --git a/src/components/characters/index.ts b/src/components/characters/index.ts
new file mode 100644
index 000000000..c1f717a92
--- /dev/null
+++ b/src/components/characters/index.ts
@@ -0,0 +1,6 @@
+export { CharacterList } from './CharacterList';
+export { CharacterCard } from './CharacterCard';
+export { CharacterProfile } from './CharacterProfile';
+export { CharacterSearch } from './CharacterSearch';
+export { CharacterRelationships } from './CharacterRelationships';
+export { CharacterStatsPanel } from './CharacterStatsPanel';
diff --git a/src/db/schema/characters.ts b/src/db/schema/characters.ts
new file mode 100644
index 000000000..3d06214eb
--- /dev/null
+++ b/src/db/schema/characters.ts
@@ -0,0 +1,49 @@
+import { sqliteTable, text, integer } from "drizzle-orm/sqlite-core";
+import { scripts } from "./scripts";
+
+export const characters = sqliteTable("characters", {
+  id: integer("id").primaryKey({ autoIncrement: true }),
+  scriptId: integer("script_id")
+    .notNull()
+    .references(() => scripts.id),
+  name: text("name").notNull(),
+  slug: text("slug").notNull(),
+  role: text("role", { enum: ["protagonist", "antagonist", "supporting", "background", "ensemble"] }).notNull().default("supporting"),
+  bio: text("bio"),
+  description: text("description"),
+  arc: text("arc"),
+  arcType: text("arc_type", { enum: ["positive", "negative", "flat", "complex"] }),
+  age: integer("age"),
+  gender: text("gender"),
+  voice: text("voice"),
+  traits: text("traits"),
+  motivation: text("motivation"),
+  conflict: text("conflict"),
+  secret: text("secret"),
+  imageUrl: text("image_url"),
+  createdAt: integer("created_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+  updatedAt: integer("updated_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+});
+
+export const characterRelationships = sqliteTable("character_relationships", {
+  id: integer("id").primaryKey({ autoIncrement: true }),
+  characterIdA: integer("character_a_id")
+    .notNull()
+    .references(() => characters.id),
+  characterIdB: integer("character_b_id")
+    .notNull()
+    .references(() => characters.id),
+  relationshipType: text("relationship_type", {
+    enum: ["family", "romantic", "friendship", "rivalry", "mentor", "alliance", "conflict", "professional", "other"],
+  }).notNull(),
+  description: text("description"),
+  strength: integer("strength").notNull().default(50),
+  isAntagonistic: integer("is_antagonistic", { mode: "boolean" }).notNull().default(false),
+  createdAt: integer("created_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+  updatedAt: integer("updated_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+});
+
+export type Character = typeof characters.$inferSelect;
+export type NewCharacter = typeof characters.$inferInsert;
+export type CharacterRelationship = typeof characterRelationships.$inferSelect;
+export type NewCharacterRelationship = typeof characterRelationships.$inferInsert;
diff --git a/src/db/schema/index.ts b/src/db/schema/index.ts
new file mode 100644
index 000000000..11a188e52
--- /dev/null
+++ b/src/db/schema/index.ts
@@ -0,0 +1,6 @@
+export { users, type User, type NewUser } from "./users";
+export { projects, type Project, type NewProject } from "./projects";
+export { scripts, type Script, type NewScript } from "./scripts";
+export { characters, characterRelationships, type Character, type NewCharacter, type CharacterRelationship, type NewCharacterRelationship } from "./characters";
+export { scenes, sceneCharacters, type Scene, type NewScene, type SceneCharacter, type NewSceneCharacter } from "./scenes";
+export { revisions, revisionChanges, type Revision, type NewRevision, type RevisionChange, type NewRevisionChange } from "./revisions";
diff --git a/src/lib/api/trpc-client.ts b/src/lib/api/trpc-client.ts
new file mode 100644
index 000000000..ef0d4e5b3
--- /dev/null
+++ b/src/lib/api/trpc-client.ts
@@ -0,0 +1,31 @@
+import { createTRPCClient, httpBatchLink } from '@trpc/client';
+import type { AppRouter } from '../../../server/trpc';
+
+// Create tRPC client
+export function createTRPCClientInstance(baseUrl: string = 'http://localhost:8080') {
+  return createTRPCClient<AppRouter>({
+    links: [
+      httpBatchLink({
+        url: `${baseUrl}/trpc`,
+        headers: () => {
+          // Add auth headers if available
+          const token = localStorage.getItem('auth_token');
+          return {
+            authorization: token ? `Bearer ${token}` : '',
+          };
+        },
+      }),
+    ],
+  });
+}
+
+// Helper for SSR
+export function createServerTRPCClient(baseUrl: string = 'http://localhost:8080') {
+  return createTRPCClient<AppRouter>({
+    links: [
+      httpBatchLink({
+        url: `${baseUrl}/trpc`,
+      }),
+    ],
+  });
+}
diff --git a/src/lib/api/trpc-hooks.ts b/src/lib/api/trpc-hooks.ts
new file mode 100644
index 000000000..1dac8bcd3
--- /dev/null
+++ b/src/lib/api/trpc-hooks.ts
@@ -0,0 +1,266 @@
+import { createQuery, createMutation, useQueryClient } from '@tanstack/solid-query';
+import { createTRPCClientInstance } from './trpc-client';
+import type { Project, Character, CharacterRelationship, CharacterStats, Scene } from '../../../server/types/project';
+
+const trpcClient = createTRPCClientInstance();
+
+// Project hooks
+export function useProjects() {
+  return createQuery({
+    queryKey: ['projects'],
+    queryFn: async () => {
+      const result = await trpcClient.project.listProjects.query();
+      return result as Project[];
+    },
+  });
+}
+
+export function useProject(projectId: string) {
+  return createQuery({
+    queryKey: ['project', projectId],
+    queryFn: async () => {
+      const result = await trpcClient.project.getProject.query({ id: projectId });
+      return result as Project;
+    },
+    enabled: !!projectId,
+  });
+}
+
+export function useCreateProject() {
+  return createMutation({
+    mutationFn: async (input: { name: string; description?: string }) => {
+      return trpcClient.project.createProject.mutate(input) as Promise<Project>;
+    },
+    onSuccess: () => {
+      const qc = useQueryClient();
+      qc.invalidateQueries({ queryKey: ['projects'] });
+    },
+  });
+}
+
+// Character hooks
+export function useCharacters(projectId: string) {
+  return createQuery({
+    queryKey: ['characters', projectId],
+    queryFn: async () => {
+      const result = await trpcClient.project.listCharacters.query({ projectId });
+      return result as Character[];
+    },
+    enabled: !!projectId,
+  });
+}
+
+export function useCharacter(characterId: string) {
+  return createQuery({
+    queryKey: ['character', characterId],
+    queryFn: async () => {
+      const result = await trpcClient.project.getCharacter.query({ id: characterId });
+      return result as Character;
+    },
+    enabled: !!characterId,
+  });
+}
+
+export function useSearchCharacters(projectId: string, query?: string, role?: string, arcType?: string) {
+  return createQuery({
+    queryKey: ['searchCharacters', projectId, query, role, arcType],
+    queryFn: async () => {
+      const result = await trpcClient.project.searchCharacters.query({
+        projectId,
+        query,
+        role,
+        arcType,
+      });
+      return result as Character[];
+    },
+    enabled: !!projectId,
+  });
+}
+
+export function useCharacterStats(characterId: string) {
+  return createQuery({
+    queryKey: ['characterStats', characterId],
+    queryFn: async () => {
+      const result = await trpcClient.project.getCharacterStats.query({ characterId });
+      return result as CharacterStats;
+    },
+    enabled: !!characterId,
+  });
+}
+
+export function useProjectCharacterStats(projectId: string) {
+  return createQuery({
+    queryKey: ['projectCharacterStats', projectId],
+    queryFn: async () => {
+      const result = await trpcClient.project.getProjectCharacterStats.query({ projectId });
+      return result as CharacterStats[];
+    },
+    enabled: !!projectId,
+  });
+}
+
+export function useCreateCharacter() {
+  const qc = useQueryClient();
+  return createMutation({
+    mutationFn: async (input: {
+      name: string;
+      description?: string;
+      bio?: string;
+      role?: 'protagonist' | 'antagonist' | 'supporting' | 'background' | 'ensemble';
+      arc?: string;
+      arcType?: 'positive' | 'negative' | 'flat' | 'complex';
+      age?: number;
+      gender?: string;
+      voice?: string;
+      traits?: string;
+      motivation?: string;
+      conflict?: string;
+      secret?: string;
+      imageUrl?: string;
+      projectId: string;
+    }) => {
+      return trpcClient.project.createCharacter.mutate(input) as Promise<Character>;
+    },
+    onSuccess: (_, variables) => {
+      qc.invalidateQueries({ queryKey: ['characters', variables.projectId] });
+    },
+  });
+}
+
+export function useUpdateCharacter() {
+  const qc = useQueryClient();
+  return createMutation({
+    mutationFn: async (input: {
+      id: string;
+      name?: string;
+      description?: string;
+      bio?: string;
+      role?: 'protagonist' | 'antagonist' | 'supporting' | 'background' | 'ensemble';
+      arc?: string;
+      arcType?: 'positive' | 'negative' | 'flat' | 'complex';
+      age?: number;
+      gender?: string;
+      voice?: string;
+      traits?: string;
+      motivation?: string;
+      conflict?: string;
+      secret?: string;
+      imageUrl?: string;
+      projectId?: string;
+    }) => {
+      return trpcClient.project.updateCharacter.mutate(input) as Promise<Character>;
+    },
+    onSuccess: (_, variables) => {
+      qc.invalidateQueries({ queryKey: ['character', variables.id] });
+      qc.invalidateQueries({ queryKey: ['characters'] });
+    },
+  });
+}
+
+export function useDeleteCharacter() {
+  const qc = useQueryClient();
+  return createMutation({
+    mutationFn: async (id: string) => {
+      return trpcClient.project.deleteCharacter.mutate({ id }) as Promise<{ success: boolean }>;
+    },
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ['characters'] });
+      qc.invalidateQueries({ queryKey: ['characterRelationships'] });
+    },
+  });
+}
+
+// Relationship hooks
+export function useRelationships(projectId: string) {
+  return createQuery({
+    queryKey: ['characterRelationships', projectId],
+    queryFn: async () => {
+      const result = await trpcClient.project.listRelationships.query({ projectId });
+      return result as CharacterRelationship[];
+    },
+    enabled: !!projectId,
+  });
+}
+
+export function useCharacterRelationships(characterId: string) {
+  return createQuery({
+    queryKey: ['characterRelationships', characterId],
+    queryFn: async () => {
+      const result = await trpcClient.project.getRelationshipsForCharacter.query({ characterId });
+      return result as CharacterRelationship[];
+    },
+    enabled: !!characterId,
+  });
+}
+
+export function useCreateRelationship() {
+  const qc = useQueryClient();
+  return createMutation({
+    mutationFn: async (input: {
+      characterIdA: string;
+      characterIdB: string;
+      relationshipType: 'family' | 'romantic' | 'friendship' | 'rivalry' | 'mentor' | 'alliance' | 'conflict' | 'professional' | 'other';
+      description?: string;
+      strength?: number;
+      isAntagonistic?: boolean;
+    }) => {
+      return trpcClient.project.createRelationship.mutate(input) as Promise<CharacterRelationship>;
+    },
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ['characterRelationships'] });
+    },
+  });
+}
+
+export function useUpdateRelationship() {
+  const qc = useQueryClient();
+  return createMutation({
+    mutationFn: async (input: {
+      id: string;
+      relationshipType?: 'family' | 'romantic' | 'friendship' | 'rivalry' | 'mentor' | 'alliance' | 'conflict' | 'professional' | 'other';
+      description?: string;
+      strength?: number;
+      isAntagonistic?: boolean;
+    }) => {
+      return trpcClient.project.updateRelationship.mutate(input) as Promise<CharacterRelationship>;
+    },
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ['characterRelationships'] });
+    },
+  });
+}
+
+export function useDeleteRelationship() {
+  const qc = useQueryClient();
+  return createMutation({
+    mutationFn: async (id: string) => {
+      return trpcClient.project.deleteRelationship.mutate({ id }) as Promise<{ success: boolean }>;
+    },
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ['characterRelationships'] });
+    },
+  });
+}
+
+// Scene hooks
+export function useScenes(projectId: string) {
+  return createQuery({
+    queryKey: ['scenes', projectId],
+    queryFn: async () => {
+      const result = await trpcClient.project.listScenes.query({ projectId });
+      return result as Scene[];
+    },
+    enabled: !!projectId,
+  });
+}
+
+export function useScene(sceneId: string) {
+  return createQuery({
+    queryKey: ['scene', sceneId],
+    queryFn: async () => {
+      const result = await trpcClient.project.getScene.query({ id: sceneId });
+      return result as Scene;
+    },
+    enabled: !!sceneId,
+  });
+}