すべての偉大な物語は、ほとんどの作家が何年もの試行錯誤で学ぶ目に見えないルールに従っています。これらのプロンプトは、そのプロセスをショートカットし、複雑なキャラクター開発、満足度の高いプロット構成、ページをめくらせる文章の作成を手助けします。ChatGPT、Gemini、Claudeでテスト済みなので、最も優れたストーリーを語るモデルがわかります。
| やりたいこと | 最適な用途 |
|---|---|
| 深みのあるキャラクターを開発する | Claude |
| 満足度の高いプロット構造を設計する | ChatGPT |
| 自然で印象的な台詞を作成する | Claude |
| フィクションの世界を設計する | Gemini |
| シーンの緊張感と感情的インパクトを高める | Gemini |
| 読者を引き込む冒頭を書く | ChatGPT |
プロンプト
深みのあるキャラクターを開発する
Help me create a deep, multi-dimensional character for my [genre] story. Role in story: [protagonist / antagonist / supporting] Setting: [time period and world] Core conflict: [what the story is about] Initial character concept: [brief sketch of who they are] Build this character: 1. A backstory that explains their core motivation (what they want and WHY) 2. Their fatal flaw — the internal weakness that creates the story's tension 3. A contradiction that makes them feel real (e.g. brave but terrified of vulnerability) 4. 5 specific mannerisms, speech patterns, or habits that reveal personality 5. Their relationship to 2-3 other characters and what each relationship reveals 6. A character arc: who they are at the start vs. who they become by the end
最適な用途: CLAUDE
Claudeは最も複雑で立体的なキャラクターを開発し、矛盾や弱さを含む本物の人間のようなキャラクターを作成します。
テスト済み Feb 15, 2026
プロのコツ
キャラクターの「秘密」を1つ設定しましょう。読者に明かさなくても、その秘密がキャラクターの行動と選択に一貫性を与えます。
満足度の高いプロット構造を設計する
Help me structure a plot for my [genre] story. Premise: [one-sentence story concept] Main character: [brief description] Setting: [where and when] Length: [short story / novella / novel] Tone: [dark / humorous / literary / thriller / heartwarming] Build the plot structure: 1. The hook: an opening scene that drops the reader into action or intrigue 2. The inciting incident: the event that disrupts the character's normal world 3. Rising action: 3-4 escalating complications that raise the stakes 4. The midpoint twist: a revelation that changes everything 5. The crisis: the moment the character must make an impossible choice 6. Resolution: how the story ends (and what remains deliberately unresolved)
最適な用途: CHATGPT
ChatGPTは最もバランスの取れたプロット構造を設計し、テンション、ペーシング、伏線の配置が効果的です。
テスト済み Feb 15, 2026
プロのコツ
結末を先に決めてから逆算しましょう。最終地点がわかっていると、すべてのシーンがその結末に向かって意味を持つようになります。
自然で印象的な台詞を作成する
Help me write a dialogue scene between [number] characters. Characters involved: - [Character A]: [personality, mood, goal in this scene] - [Character B]: [personality, mood, goal in this scene] Scene context: [where they are and what just happened] Subtext: [what's really being discussed beneath the surface] Tension level: [low / simmering / explosive] Write the scene with: 1. Distinct voice for each character (different sentence length, vocabulary, rhythm) 2. Subtext — what they mean vs. what they say 3. Action beats between dialogue lines (not just 'he said / she said') 4. At least one moment where a character avoids answering directly 5. An emotional shift: the conversation should feel different at the end than the start 6. A closing line that lingers with the reader
最適な用途: CLAUDE
Claudeは最も自然で特徴的な台詞を書き、各キャラクターに独自の声と話し方のパターンを与えます。
テスト済み Feb 15, 2026
プロのコツ
良い台詞は情報を伝えるだけでなく、キャラクターの性格も表現します。AIに「この台詞からキャラクターについて何がわかるか?」と聞きましょう。
フィクションの世界を設計する
Help me build a world for my [genre] story. Core concept: [what makes this world different from ours] Time period feel: [medieval / modern / futuristic / timeless] Scale: [a single city / a country / an entire planet / a multiverse] Magic/technology: [what rules apply — or what rules don't] Themes: [what ideas this world is designed to explore] Build the world: 1. The 3 rules that define how this world works differently from ours 2. Social structure: who has power and why (and who doesn't) 3. History: one pivotal event in the past that shaped the current world 4. Daily life: what an ordinary person's day looks like 5. Conflict: the central tension built into the world's design 6. Sensory details: what this world looks, sounds, smells, and feels like
最適な用途: GEMINI
Geminiは最も詳細で一貫性のある世界設定を構築し、地理、文化、歴史、経済の相互関係が論理的です。
テスト済み Feb 15, 2026
プロのコツ
読者に見える世界は氷山の一角です。背景に90%の設定があることで、見える10%がリアルに感じられます。すべてを作品に入れる必要はありません。
シーンの緊張感と感情的インパクトを高める
This scene feels flat and I need help making it more compelling: [Paste your scene or describe what happens] What this scene needs to accomplish: [plot purpose] Emotional tone I'm going for: [suspense / sadness / humor / wonder] What I think is missing: [my instinct about the problem] Rework this scene by: 1. Identifying the core problem: why this scene doesn't work yet 2. Adding a source of tension or conflict (even in quiet scenes) 3. Engaging at least 3 senses beyond just visual 4. Showing character emotion through action and body language, not narration 5. Cutting any line that doesn't serve character, plot, or atmosphere 6. Rewriting the opening and closing lines for maximum impact
最適な用途: GEMINI
Claudeはシーンの感情的なレイヤーを最も効果的に追加し、サブテキストと身体的描写を通じて緊張感を構築します。
テスト済み Feb 15, 2026
プロのコツ
「怖かった」と書く代わりに、恐怖の身体的反応を描写しましょう。手が震える、口が乾く、心臓が跳ねる。読者に感情を感じさせるのがshow, don't tellです。
読者を引き込む冒頭を書く
Help me write a compelling opening for my [genre] story. Story premise: [what the story is about] Main character: [brief description] Tone: [dark / whimsical / literary / fast-paced] Length of opening: [first paragraph / first page / first chapter outline] Generate: 1. 5 different opening line options with different hook strategies 2. For the best one: expand it into a full opening paragraph 3. A 'cold open' version that starts in the middle of action 4. A 'voice-driven' version that establishes character through narration 5. A 'mystery' version that opens with an unanswered question 6. Analysis: which opening works best for this specific story and why
最適な用途: CHATGPT
ChatGPTは最も多様なオープニングスタイルを提案し、ジャンルに合った効果的なフックを作成します。
テスト済み Feb 15, 2026
プロのコツ
最初の文は約束です。その文が示唆するストーリーを読者が読みたいかどうかを自分に問いましょう。約束を守れないフックは避けてください。
実際のテストに基づいています — 推測ではありません。 テスト方法を見る
Gemini
Best for world building and scene-level craft. Creates internally consistent fictional worlds and provides structural analysis of why scenes work or don't. Less effective at raw creative prose generation.
結果元: Gemini 2.0 Flash · テスト済み Feb 15, 2026ChatGPT
Best for plot structure and opening hooks. Generates the most inventive twists and attention-grabbing first lines. Can default to genre cliches if not given enough original direction in the prompt.
結果元: GPT-4o · テスト済み Feb 15, 2026Claude
Best for character development and dialogue. Creates the most psychologically complex characters and writes the most authentic conversations with genuine subtext. Sometimes over-literary for commercial fiction.
結果元: Claude 3.5 Sonnet · テスト済み Feb 15, 2026Grok
Excellent at generating unexpected plot twists, dark humor, and stories with a distinctive edge that other models play too safe to attempt. Strong at writing anti-heroes and morally gray characters. Less effective at literary fiction, lyrical prose, and stories requiring emotional subtlety over shock value.
結果元: Grok 2 · テスト済み Feb 15, 2026Use AI as a brainstorming partner, not a ghostwriter. AI-generated prose sounds like AI no matter how good the prompt is. Use AI to develop characters, structure plots, and work through story problems. Then write the actual prose yourself — that's where your voice lives.
Conflict is not optional in any scene. Every scene needs someone who wants something and something standing in their way. Even a quiet dinner scene needs disagreement, unspoken tension, or a secret. Conflict is the engine of story — without it, you have a summary.
Cut your first paragraph. Your story probably starts on paragraph two. Most writers warm up in their first paragraph, clearing their throat before the story begins. Delete it and see if the story improves. Nine times out of ten, it does.