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BY@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

Nano Banana Pro Manga Generation Prompt with Character Consistency Rules

Nano Banana Pro Manga Generation Prompt with Character Consistency Rules

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.

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Common Questions

Nano Banana Pro is Google's latest multimodal AI model featuring multimodal understanding (text, images, and video), high-quality generation from photorealistic to artistic styles, fast iteration with quick edits and variations, diverse styles from pixel art to oil paintings, precise control over composition and lighting, and complex multi-object, multi-character scene rendering.
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