【画像生成AI】キャラを固定して立ち絵やスチルを作る方法を公開（プロンプト）｜乙女ゲーム風AI彼氏のキャラクター紹介①

#Positive Prompt：
masterpiece, best quality, ultra detailed, anime style, high detail rendering, clean lineart, soft shading, polished rendering, refined details, clean digital illustration, polished anime character illustration, visually clean finish,

portrait orientation, vertical composition, 2:3 aspect ratio, tall canvas, full-length character illustration, vertical full-body shot, full body, full body centered composition, character fully inside frame, feet fully visible, camera pulled back enough to include the entire figure from head to toe, character occupies most of the vertical canvas, minimal empty space on the left and right, fashion illustration framing, plain white background, clean white studio background, simple white background,

young handsome male, tall male, 185cm height, small face, 8 to 9 heads tall, very long legs, long inseam, high waist, elongated lower body proportions, perfect body proportions, model-like physique, slim yet toned, healthy body, elegant silhouette,

same character as the reference image, keep the facial identity consistent with the reference image, preserve the hairstyle, hair color, eye color, face shape, bangs, skin tone, and overall aesthetic of the reference image, match the character’s vibe and visual impression closely, naturally extrapolate the unseen full body design to match the reference image,

natural pose, pose fitting the character’s vibe and visual impression,

[hair description],
[eye description],
[facial expression],
[outfit description],
[overall atmosphere / personality impression],

polished anime illustration, visually balanced composition, clean final artwork, smooth and refined finish, crisp details, consistent rendering quality

#Negative Prompt：
low quality, worst quality, blurry, bad anatomy, bad proportions, landscape orientation, wide composition, too much empty space, short legs, stubby legs, short inseam, low waist, oversized head, chibi proportions, childlike proportions, stiff pose, awkward pose, extra limbs, extra fingers, missing fingers, deformed hands, malformed feet, cropped feet, character out of frame, detailed background, scenery, complex background, text, watermark, logo, rough lineart, sketchy lines, messy shading, unfinished rendering, grainy texture, noisy details

以下のプロンプトに添付のキャラクターを反映させて、画像を生成してください。

A detailed character design sheet (sanmengai/three-view diagram) for an anime/game production, featuring [1. キャラクターの性別と大まかなタイプ] against a clean, plain white background. The sheet is horizontally arranged into three full-body standing poses in a neutral, orthogonal perspective:

1.  **Front View (Center):** This is the main full-body pose, showing the character from the direct front in a neutral standing position (arms may be slightly at sides or in a simple, descriptive pose like a hand in pocket). They are wearing their primary outfit: [2. 正面から見た服装の詳細：色、素材、デザイン（例：シャツ、ジャケット、ズボン、スカート、靴など）]. The facial expression is neutral.

2.  **Side View (Left):** A full-body profile view from the left side, standing in the same position. This view must clearly show: the side profile of their face (including any distinct features like [3. 横顔で強調すべき特徴：タトゥー、傷、イヤリングなど]), the full side silhouette and volume of their hair ([4. 髪型と髪色の詳細]), the side construction of the outfit ([5. 服装の側面詳細：袖の構造、サイドポケット、ベルトの側面など]), and one shoe.

3.  **Back View (Right):** A full-body view from directly behind. This view shows: the back of the head and the full back contour of their hair, the back of the outfit including the back seam of the top, shoulder blades, waist area, and any back-specific details like [6. 背面の詳細：ロゴ、背中の空き具合、ケープ、バックパックなど], the back of the trousers/skirt, and the backs of the shoes. Both arms are held down at the sides.

**Details to include:**
* **Color Palette (swatches):** A small block of color swatches in the upper-right corner for: [7. カラーパレット：髪、肌、目の色、服の各パーツ（例：Hair, Skin, Eye, Shirt, Trousers）].
* **Detail Close-ups:** Small call-out boxes for:
   * One box showing a close-up of the character's face (front view) to highlight [8. 顔の拡大図：目の形、目の色、眼鏡、メイクなど].
   * One box showing a detailed view of a key outfit component or accessory ([9. 服装・小物の拡大図：襟元の構造、特殊なベルト、タトゥー、武器、宝石など]).
   * One box showing a close-up of the footwear or another specific detail ([10. 靴やその他の拡大図：靴のデザイン、靴底、手袋、ポーチなど]).
* **Expression Sheet:** A small section below the three views with two additional face-only expressions: [11. 追加の表情：例「Slight Smile」と「Serious/Contemplative」など].
* **Title:** Text in a clean, sans-serif font: "CHARACTER DESIGN SHEET: [12. キャラクター名またはコード]" and "[13. キャラクターのキーワード：例「GENTLEMAN SMOKER」「ARCANE MAGE」「CYBERPUNK DETECTIVE」など]".
* **Art Style:** Precise, clean-lined anime/game-style art with [14. 塗り・質感の指定：例「cel-shading with clear highlights」または「soft-shading with complex textures」など] on all three views.

The entire composition is neat, with clear spacing and subtle grid lines, resembling a professional design asset.

添付した画像のキャラクターをベースに、以下の条件で画像を生成してください。

【今回のシチュエーション】
・（ここに今回のシチュエーションを入れる）

【キャラクター】
・添付画像のキャラクターを元にした同一人物として描写する
・髪型、髪色、目の色、顔立ち、表情の傾向、雰囲気、衣装の特徴を最優先で維持する
・女性キャラクター、ヒロイン、別キャラクターは描かない
・キャラクターは1人のみ描く

【描写方針】
・キャラクターの表情、視線、ポーズ、手の動き、体の向き、距離感が自然に伝わるように描写する
・今回のシチュエーションが一目で分かるように、背景、小物、光、空気感を具体的に描く
・背景は白背景や無地ではなく、シチュエーションに合った空間として丁寧に描き込む
・キャラクターと背景が自然に馴染んだ、完成度の高い一枚絵にする
・構図はシチュエーションに応じて自然に決め、人物の魅力と場面のドラマ性がしっかり伝わるようにする

【雰囲気・品質】
・乙女ゲームの上位レアイベントCGのような、美麗さ、没入感、特別感、ときめき、ドラマ性を重視する
・高画質、繊細な描写、厚塗りとアニメ塗りをバランス良く取り入れた仕上がり
・光の演出、影、空気感、奥行きを丁寧に描写する
・表情や仕草から感情が自然に伝わるようにする

【出力ルール】
・テキストでの説明やプロンプト表示は行わない
・完成画像のみを生成する
・画像内に文字、説明、キャプション、ロゴ、透かしは入れない