Comic / Storyboard - Nano Banana Pro Manga Generation Prompt with Character Consistency Rules

@タダオ｜AIマンガ家 / 生成AI活用して人生アップデートしたーい·Dec 27, 2025

A detailed system prompt for Nano Banana Pro aimed at generating manga pages while strictly maintaining character consistency based on an uploaded reference image. It includes specific rules for fixing character features (hair, eyes, clothing) as 'master data,' applying a chibi style only to body proportions, and enforcing strict rules for natural Japanese dialogue and camera work to avoid monotony.

Prompt

Please generate a manga page. #Character (Highest Priority): **[Important: Perfect reproduction of the attached image (image_urls)] This is not a reference image but an “unalterable master data.” Strictly adhere to the following processes in all generated panels.** 1. **Fixing Features:** Maintain 100% of the attached image's **“hair style, hair color, eye shape, clothing, and accessories.”** Unauthorized arrangements or simplifications are prohibited. 2. **Deformation Rules:** When applying the #Style (chibi character), **only the “head-to-body ratio” should be reduced, and the “face part arrangement and hairstyle design” must not deviate from the attached image.** 3. **Maintaining Identity:** Even if the angle changes, it must be “the same character viewed from a different angle.” Do not change the face to look like a different person. 4. **Do not cause “Prompt Bleed (instruction leakage).”** #Output Size 9:16 #Style: **Basic Art Style:** Monochrome, Japanese manga, gag manga style, thick outline lines. **Style prompt:** Japanese manga, chibi style, thick outline lines, monochrome. **Format:** Vertical writing, Japanese panel layout read from right to left. #Text Generation Rules (Strict Adherence): **[Important: Natural Japanese and Elimination of Duplication]** When generating dialogue in the manga, perform proofreading immediately before output to absolutely prevent the following errors: 1. **Prohibition of Tautology:** Do not repeat the same word or conjunction twice, such as “that is, that is,” “but, but,” or “really, really.” Stuttering expressions are prohibited. 2. **Natural Colloquial Language:** Use natural speech appropriate for the character's personality, not textbook sentences. 3. **Garbled Text Check:** Confirm that Kanji and Hiragana are not corrupted. #Direction/Camera Work: **[Important: Direction while maintaining features]** Use the following camera work within the range that does not distort the character's face or hairstyle to avoid monotony: - **Close-up:** Emphasizing emotion (※Do not overly deform facial parts) - **Long Shot:** Explaining the situation - **High/Low Angle:** Expressing impact or cuteness - **Diagonal Composition:** Expressing agitation or action #Scenario Progression: If no specific panel designation is given, summarize and compose in 3 to 5 panels. Panel arrangement should not be uniform but irregular or free-form, while maintaining the line of sight guidance from “top right to bottom left.” #Negative Prompt (Elements to Avoid): **repeating words, stuttering text, duplicate phrases, tautology,** altering character design, changing hair color, changing hairstyle, different outfit, monotonous composition, repetitive angles, character facing forward in all panels, flat lighting, messy panel borders, text overlap. #Scenario: [Think of the continuation of the attached manga.]

Try this Prompt

Animal Companion Character Design Chibi Close-up Cute & Playful Fashion Look Game Concept Ink Sketch Manga Monochrome Portrait Orientation Product Mockup Storyboard Text Friendly Area Worms Eye View

How to Use This Prompt

Copy the full prompt text with the copy button above.
Replace any [bracketed] placeholders with your own subject, scene, or details.
Paste it into Gemini / Nano Banana Pro — or hit "Try this Prompt" above to generate here for free — then tweak the wording against the example images.

Style Notes

Character Design: A character presented for reference: readable silhouette, costume and prop details, often multiple angles or expressions in one sheet.
Close-up: Tight crop on the subject — texture and emotion over context; pairs naturally with high-detail and shallow depth of field.
Cute & Playful: Rounded shapes, big eyes, candy palettes, and toy-like proportions — the visual language of mascots and sticker packs.
Fashion Look: Editorial fashion styling: garment detail and fabric texture take priority, with model poses and lighting borrowed from magazine shoots.
Portrait Orientation: Vertical aspect ratio (e.g. 3:4, 9:16) — the native format for phone screens, Stories, and app store screenshots.
Product Mockup: The design presented in context — packaging on a shelf, app on a phone screen, tee on a model — to preview how it looks in the real world.

FAQ

How do I use this prompt with Gemini (Nano Banana Pro)?

Copy the full prompt with the copy button above, paste it into Gemini or any Nano Banana Pro-powered tool, and compare your result with the example images on this page. You can also click "Try this Prompt" to generate directly on this site — free daily generations, no sign-up needed.

Can I customize "Comic / Storyboard - Nano Banana Pro Manga Generation Prompt with Character Consistency Rules"?

Yes. Anything in [brackets] is a placeholder meant to be replaced with your own subject or details, and you can freely adjust subject, lighting, or style keywords — small wording changes often produce noticeably different results.

Which AI models does this prompt work with?

It was originally shared for Google's Gemini image models (including Nano Banana Pro). Most text-to-image models will understand it too, though composition and text rendering quality vary by model.