diff --git a/src/common/typebox.ts b/src/common/typebox.ts
index 79a081b..0422463 100644
--- a/src/common/typebox.ts
+++ b/src/common/typebox.ts
@@ -4,8 +4,8 @@ const GlobalNumber = Number;
 const GlobalArray = Array;
 
 export namespace Type {
-    export function String(args: { description?: string, enum?: string[] } = {}) {
-        const result: TString = {
+    export function String<S extends string = string>(args: { description?: string, enum?: S[] } = {}) {
+        const result: TString<S> = {
             type: 'string',
         };
         if (args.enum) {
@@ -17,8 +17,8 @@ export namespace Type {
         return result;
     }
 
-    export function Number(args: { description?: string, enum?: number[] } = {}) {
-        const result: TNumber = {
+    export function Number<N extends number = number>(args: { description?: string, enum?: N[] } = {}) {
+        const result: TNumber<N> = {
             type: 'number',
         };
         if (args.enum) {
@@ -30,8 +30,8 @@ export namespace Type {
         return result;
     }
 
-    export function Integer(args: { description?: string, enum?: number[] } = {}) {
-        const result: TNumber = {
+    export function Integer<N extends number = number>(args: { description?: string, enum?: N[] } = {}) {
+        const result: TNumber<N> = {
             type: 'integer',
         };
         if (args.enum) {
@@ -70,7 +70,7 @@ export namespace Type {
         return result as unknown as TOptional<T>;
     }
 
-    export function Object<T extends Record<string, TScheme> = Record<string, TScheme>>(properties: T, args: { description?: string } = {}) {
+    export function Object<T extends TProperties = TProperties>(properties: T, args: { description?: string } = {}) {
         const result: TObject<T> = {
             type: 'object',
             properties,
@@ -83,13 +83,9 @@ export namespace Type {
         return result;
     }
 
-    type TEnumType<T extends (string | number) = (string | number)> =
-        T extends string ? TString<T> :
-        T extends number ? TNumber<T> : never;
-
-    export function Enum<T extends TString>(items: Static<T>[], args?: { description?: string }): T;
-    export function Enum<T extends TNumber>(items: Static<T>[], args?: { description?: string }): T;
-    export function Enum<T extends TEnumType = TEnumType>(items: Static<T>[], args: { description?: string } = {}) {
+    export function Enum<S extends string, T extends TString<S>>(items: S[], args?: { description?: string }): T;
+    export function Enum<N extends number, T extends TNumber<N>>(items: N[], args?: { description?: string }): T;
+    export function Enum(items: (number | string)[], args: { description?: string } = {}) {
         if (typeof items?.[0] === 'number') {
             return Number({ enum: items.map(item => +item!), ...args });
         }
@@ -195,7 +191,9 @@ export interface TArray<T extends TScheme = TScheme> {
     items: T;
 }
 
-export interface TObject<T extends Record<string, TScheme> = Record<string, TScheme>> {
+export type TProperties = Record<string, TScheme>;
+
+export interface TObject<T extends TProperties = TProperties> {
     type: 'object';
     description?: string;
     properties: T;
@@ -218,7 +216,7 @@ export interface TOptionalArray<T extends TScheme = TScheme> extends TArray<T> {
     [optional]: true;
 }
 
-export interface TOptionalObject<T extends Record<string, TScheme> = Record<string, TScheme>> extends TObject<T> {
+export interface TOptionalObject<T extends TProperties = TProperties> extends TObject<T> {
     [optional]: true;
 }
 
@@ -236,15 +234,15 @@ export type TScheme = TString | TNumber | TBoolean | TArray | TObject | TOptiona
 
 type Prettify<T> = { [K in keyof T]: T[K] } & {};
 
-type RequiredKeys<T extends Record<string, TScheme>> = {
+type RequiredKeys<T extends TProperties> = {
     [K in keyof T]: IsOptional<T[K]> extends true ? never : K
 }[keyof T];
 
-type OptionalKeys<T extends Record<string, TScheme>> = {
+type OptionalKeys<T extends TProperties> = {
     [K in keyof T]: IsOptional<T[K]> extends true ? K : never
 }[keyof T];
 
-type StaticObject<T extends Record<string, TScheme>> = Prettify<
+type StaticObject<T extends TProperties> = Prettify<
     { [K in RequiredKeys<T>]: Static<T[K]> } &
     { [K in OptionalKeys<T>]?: Static<T[K]> }
 >;
diff --git a/src/games/storywriter/assets/character-editor.module.css b/src/games/storywriter/assets/character-editor.module.css
index ef6a781..2e4278d 100644
--- a/src/games/storywriter/assets/character-editor.module.css
+++ b/src/games/storywriter/assets/character-editor.module.css
@@ -257,6 +257,23 @@
     }
 }
 
+.select {
+    width: 100%;
+    padding: 10px 12px;
+    background: var(--bg);
+    border: 1px solid var(--border);
+    border-radius: 6px;
+    font-size: 14px;
+    color: var(--text);
+    font-family: inherit;
+    cursor: pointer;
+
+    &:focus {
+        outline: none;
+        border-color: var(--accent);
+    }
+}
+
 .smallButton {
     padding: 4px 10px;
     background: var(--bg);
diff --git a/src/games/storywriter/components/character-editor.tsx b/src/games/storywriter/components/character-editor.tsx
index 5f9773a..4200b00 100644
--- a/src/games/storywriter/components/character-editor.tsx
+++ b/src/games/storywriter/components/character-editor.tsx
@@ -1,4 +1,4 @@
-import { useAppState, type Character } from "../contexts/state";
+import { CharacterRole, useAppState, type Character } from "../contexts/state";
 import { useState } from "preact/hooks";
 import styles from '../assets/character-editor.module.css';
 import LLM from "../utils/llm";
@@ -22,6 +22,7 @@ export const CharacterEditor = () => {
             character: {
                 id: crypto.randomUUID(),
                 name: 'New Character',
+                role: CharacterRole.Main,
                 nicknames: [],
                 shortDescription: '',
                 description: '',
@@ -173,6 +174,23 @@ export const CharacterEditor = () => {
                             )}
                         </div>
 
+                        <div class={styles.field}>
+                            <div class={styles.label}>Role</div>
+                            <select
+                                class={styles.select}
+                                value={character.role}
+                                onInput={(e) => handleEditCharacter(character.id, 'role', e.currentTarget.value as CharacterRole)}
+                            >
+                                {Object.entries(CharacterRole)
+                                    .filter(([, value]) => typeof value === 'string')
+                                    .map(([key, value]) => (
+                                        <option key={key} value={value}>
+                                            {key.charAt(0).toUpperCase() + key.slice(1).toLowerCase()}
+                                        </option>
+                                    ))}
+                            </select>
+                        </div>
+
                         <div class={styles.field}>
                             <div class={styles.label}>Description</div>
                             <ContentEditable
diff --git a/src/games/storywriter/contexts/state.tsx b/src/games/storywriter/contexts/state.tsx
index e1ada97..205b1ab 100644
--- a/src/games/storywriter/contexts/state.tsx
+++ b/src/games/storywriter/contexts/state.tsx
@@ -13,9 +13,20 @@ export type ChatMessage = LLM.ChatMessage & {
 
 export type Tab = "story" | "lore" | "characters" | "locations" | "chapters";
 
+export enum CharacterRole {
+    Protagonist = 'protagonist',
+    Antagonist = 'antagonist',
+    Main = 'main',
+    Secondary = 'secondary',
+    Supporting = 'supporting',
+    Minor = 'minor',
+    Cameo = 'cameo',
+}
+
 export interface Character {
     id: string;
     name: string;
+    role: CharacterRole;
     nicknames: string[];
     shortDescription: string;
     description: string;
@@ -89,7 +100,7 @@ type Action =
     | { type: 'SET_ENABLE_THINKING'; enable: boolean }
     | { type: 'SET_BANNED_TOKENS'; tokens: string[] }
     | { type: 'ADD_CHARACTER'; storyId: string; character: Character }
-    | { type: 'EDIT_CHARACTER'; storyId: string; characterId: string; updates: Partial<Omit<Character, 'relations'>> }
+    | { type: 'EDIT_CHARACTER'; storyId: string; characterId: string; updates: Partial<Omit<Character, 'id' | 'name' | 'relations'>> }
     | { type: 'DELETE_CHARACTER'; storyId: string; characterId: string }
     | { type: 'ADD_CHARACTER_RELATION'; storyId: string; characterId: string; relation: Character['relations'][number] }
     | { type: 'EDIT_CHARACTER_RELATION'; storyId: string; characterId: string; targetName: string; updates: Partial<Character['relations'][number]> }
diff --git a/src/games/storywriter/utils/prompt.ts b/src/games/storywriter/utils/prompt.ts
index 2f7bc0c..9a75689 100644
--- a/src/games/storywriter/utils/prompt.ts
+++ b/src/games/storywriter/utils/prompt.ts
@@ -1,6 +1,6 @@
 import LLM from "./llm";
 import Chapters from "./chapters";
-import { type AppState, LocationScale } from "../contexts/state";
+import { type AppState, CharacterRole, LocationScale } from "../contexts/state";
 import { Tools } from "./tools";
 
 namespace Prompt {
@@ -110,6 +110,71 @@ namespace Prompt {
         return renderSlots(slots);
     }
 
+    /**
+     * Character detail configuration based on role.
+     * Determines how much information to include in the system prompt for each character.
+     * AI agents can retrieve full character details on-demand via the get_character tool.
+     */
+    interface CharacterDetailConfig {
+        includeRole: boolean;
+        includeNicknames: boolean;
+        includeShortDescription: boolean;
+        includeFullDescription: boolean;
+        includeRelations: boolean;
+    }
+
+    const CHARACTER_ROLE_DETAIL: Record<CharacterRole, CharacterDetailConfig> = {
+        [CharacterRole.Protagonist]: {
+            includeRole: true,
+            includeNicknames: true,
+            includeShortDescription: false, // omitted if full description present
+            includeFullDescription: true,
+            includeRelations: true,
+        },
+        [CharacterRole.Main]: {
+            includeRole: true,
+            includeNicknames: true,
+            includeShortDescription: false,
+            includeFullDescription: true,
+            includeRelations: true,
+        },
+        [CharacterRole.Antagonist]: {
+            includeRole: true,
+            includeNicknames: true,
+            includeShortDescription: false,
+            includeFullDescription: true,
+            includeRelations: true,
+        },
+        [CharacterRole.Secondary]: {
+            includeRole: true,
+            includeNicknames: false,
+            includeShortDescription: true,
+            includeFullDescription: false,
+            includeRelations: true,
+        },
+        [CharacterRole.Supporting]: {
+            includeRole: true,
+            includeNicknames: false,
+            includeShortDescription: false,
+            includeFullDescription: false,
+            includeRelations: false,
+        },
+        [CharacterRole.Minor]: {
+            includeRole: true,
+            includeNicknames: false,
+            includeShortDescription: false,
+            includeFullDescription: false,
+            includeRelations: false,
+        },
+        [CharacterRole.Cameo]: {
+            includeRole: true,
+            includeNicknames: false,
+            includeShortDescription: false,
+            includeFullDescription: false,
+            includeRelations: false,
+        },
+    };
+
     export function formatCharactersMarkdown(state: AppState): string {
         const { currentStory } = state;
         if (!currentStory || !currentStory.characters?.length) {
@@ -119,15 +184,40 @@ namespace Prompt {
         const lines: string[] = [];
         lines.push('## Characters\n');
 
-        for (const character of currentStory.characters) {
+        // Sort characters by importance (protagonist first, cameo last)
+        const sortedCharacters = [...currentStory.characters].sort((a, b) => {
+            const importanceOrder = [
+                CharacterRole.Protagonist,
+                CharacterRole.Main,
+                CharacterRole.Antagonist,
+                CharacterRole.Secondary,
+                CharacterRole.Supporting,
+                CharacterRole.Minor,
+                CharacterRole.Cameo,
+            ];
+            return importanceOrder.indexOf(a.role) - importanceOrder.indexOf(b.role);
+        });
+
+        for (const character of sortedCharacters) {
+            const config = CHARACTER_ROLE_DETAIL[character.role];
             lines.push(`### ${character.name}`);
 
-            const description = character.shortDescription || character.description;
-            if (description) {
-                lines.push(description);
+            if (config.includeRole) {
+                lines.push(`**Role:** ${character.role}`);
             }
 
-            if (character.relations?.length) {
+            if (config.includeNicknames && character.nicknames?.length) {
+                lines.push(`**Nicknames:** ${character.nicknames.join(', ')}`);
+            }
+
+            const description = character.description || character.shortDescription;
+            if (config.includeFullDescription && description) {
+                lines.push(description);
+            } else if (config.includeShortDescription && character.shortDescription) {
+                lines.push(character.shortDescription);
+            }
+
+            if (config.includeRelations && character.relations?.length) {
                 lines.push('**Relations:**');
                 for (const relation of character.relations) {
                     lines.push(`- ${relation.name}: ${relation.relation}`);
diff --git a/src/games/storywriter/utils/tools.ts b/src/games/storywriter/utils/tools.ts
index 777ea0f..3b26ebb 100644
--- a/src/games/storywriter/utils/tools.ts
+++ b/src/games/storywriter/utils/tools.ts
@@ -1,6 +1,6 @@
 import { formatErrorMessage } from "@common/errors";
 import { Type, type Static, type TObject } from '@common/typebox';
-import { LocationScale, type AppState, type Character, type Location } from "../contexts/state";
+import { CharacterRole, LocationScale, type AppState, type Character, type Location } from "../contexts/state";
 import type LLM from "./llm";
 
 const SCALE_DESCRIPTION = Object.entries(LocationScale)
@@ -16,6 +16,8 @@ const SCALE_NAMES = Object.fromEntries(
         .map(([key, value]) => [value, key])
 );
 
+const VALID_ROLES = Object.values(CharacterRole);
+
 export namespace Tools {
     interface Tool<T extends TObject = TObject> {
         description: string;
@@ -36,6 +38,7 @@ export namespace Tools {
                     return `Error: Character "${args.name.trim()}" not found`;
                 }
                 let result = `# Character: ${character.name}\n\n`;
+                result += `**Role:** ${character.role}\n\n`;
                 if (character.nicknames && character.nicknames.length > 0) {
                     result += `**Nicknames:** ${character.nicknames.join(', ')}\n\n`;
                 }
@@ -75,6 +78,9 @@ export namespace Tools {
                     if (args.nicknames !== undefined) {
                         definedUpdates.nicknames = args.nicknames;
                     }
+                    if (args.role !== undefined) {
+                        definedUpdates.role = args.role;
+                    }
                     if (args.relations !== undefined) {
                         return 'Error: set_character does not support updating relations. Use set_character_relation instead.';
                     }
@@ -95,6 +101,9 @@ export namespace Tools {
                     if (!args.shortDescription) {
                         return 'Error: shortDescription is required when adding a new character';
                     }
+                    if (args.role === undefined) {
+                        return 'Error: role is required when adding a new character';
+                    }
                     const existingCharacterNames = new Set(appState.currentStory.characters.map(c => c.name));
                     const invalidRelations: string[] = [];
                     for (const rel of args.relations || []) {
@@ -108,6 +117,7 @@ export namespace Tools {
                         character: {
                             id: crypto.randomUUID(),
                             name: args.name.trim(),
+                            role: args.role,
                             nicknames: args.nicknames || [],
                             shortDescription: args.shortDescription.trim(),
                             description: args.description || '',
@@ -130,6 +140,7 @@ export namespace Tools {
             parameters: Type.Object({
                 name: Type.String({ description: "The character's full name" }),
                 shortDescription: Type.Optional(Type.String({ description: 'A brief description of the character (one line). Required on a new character.' })),
+                role: Type.Optional(Type.Enum(VALID_ROLES, { description: `The character role in the story. Required when adding a new character.` })),
                 nicknames: Type.Optional(Type.Array(Type.String(), { description: 'Optional list of nicknames' })),
                 description: Type.Optional(Type.String({ description: 'Optional full character description' })),
                 relations: Type.Optional(Type.Array(