How to Build an AI Character Bible (Free Template Inside)

Your AI character looked perfect in episode one. By episode three, she has different hair, a new skin tone, and somehow gained a hat. Sound familiar?

Character consistency is the single biggest challenge in AI video production. The fix is not better prompts alone — it is a character bible. A structured reference document that locks down who your characters are, what they look like, and how to describe them to any AI tool.

This is the system we use to keep Fruit Love Island’s cast consistent across hundreds of shots. Below is the exact framework, plus a free template you can copy.

What Is a Character Bible?

A character bible is a reference document that contains every detail an AI model needs to reproduce your character faithfully. It covers three layers: visual identity, personality traits, and prompt language. Traditional animation studios have used these for decades. For AI creators, they are essential.

Without one, you are writing character descriptions from memory every time you generate a new scene. Memory drifts. Descriptions drift. Your character drifts.

The Five Sections Every Character Bible Needs

1. Visual Identity Card

Physical appearance in exact, repeatable terms. Not “she has nice hair” — but “waist-length straight black hair with a center part, no bangs, slight blue sheen.”

Include: body type, skin tone (specific hex or descriptive anchor), eye color, hair style and color, distinguishing features, default expression.

2. Wardrobe System

Define 2–3 outfits per character. Label them: casual, formal, signature. Describe fabric, color, fit, and accessories. AI models respond better to outfit descriptions that include material texture (“silk,” “denim,” “knit”) than to abstract style words (“trendy,” “cool”).

3. Personality Anchors

Three to five adjectives that define how this character behaves. These are not just for writing dialogue — they influence body language, posture, and facial expressions in AI-generated scenes.

Example: Cherrita from Fruit Love Island — “confident, flirtatious, dramatic, loyal, loud.” Every prompt involving Cherrita includes at least two of these words.

4. Prompt Phrasing Library

The exact sentences you paste into your AI tool to summon this character. Write three versions: a short tag (under 15 words), a medium description (30–50 words), and a full description (80–120 words). Use the short tag for quick generations, the full description for hero shots.

5. Reference Image Set

Three to five “golden” images that represent the character at their most accurate. Use these as reference inputs when your tool supports image-to-image or character reference features. Label each image with the prompt that generated it so you can reproduce the result.

Free Template

Copy this template for each character in your project. Fill in the brackets.

CHARACTER BIBLE — [Character Name] ————————————— VISUAL IDENTITY • Species/type: [human, anthropomorphic fruit, robot, etc.] • Body: [build, height, proportions] • Skin/surface: [color, texture, material] • Hair: [length, style, color, parting] • Eyes: [color, shape, expression tendency] • Distinguishing marks: [scars, freckles, accessories] • Default expression: [smirk, resting calm, wide-eyed] WARDROBE • Signature outfit: [full description with fabrics] • Casual outfit: [full description] • Formal outfit: [full description] PERSONALITY ANCHORS • Three words: [word], [word], [word] • Speech style: [formal, slang-heavy, sarcastic, etc.] • Typical gesture: [hand on hip, arms crossed, etc.] PROMPT LIBRARY • Short (15 words): [paste exact prompt] • Medium (40 words): [paste exact prompt] • Full (100 words): [paste exact prompt] REFERENCE IMAGES • Golden shot 1: [filename] — prompt: [paste] • Golden shot 2: [filename] — prompt: [paste] • Golden shot 3: [filename] — prompt: [paste] NOTES [Any quirks, known failure modes, what to avoid]

Tips for Using Your Bible

Copy-paste, never retype. Every time you retype a description from memory, you introduce drift. Always paste from the bible.
Update after breakthroughs. When you discover a prompt phrasing that produces a better result, update the bible immediately. The document should be living.
Use reference images as anchors. Tools like Grok, Midjourney, and Kling let you upload reference images. Your golden shots are your anchors — use them every time.
Test with side-by-side comparisons. Generate the same character with and without the bible. The difference is dramatic.
Share with collaborators. If you work with other creators, the bible ensures everyone generates the same character.

How Fruit Love Island Uses This

Every character in Fruit Love Island — from Cherrita to Bananito to the Season 2 vegetables — has a full character bible. When we generate a new scene, we paste the character’s prompt library entry and attach their golden reference images. This is how we keep 15+ characters visually consistent across hundreds of shots.

The difference between a character with a bible and one without is the difference between a show that feels polished and one that looks like it was made by 12 different people.

Pro tip: Name your golden reference images with the character name and a version number (e.g., cherrita_v3_front.jpg). When you find a better reference, increment the version — never delete the old ones.