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AI Roleplay Prompts That Actually Work

Independent developer of Underfiction
Zürich, Switzerland

Prompt lists are the empty calories of AI roleplay advice: fifty copy-paste openers that all decay into the same scene, because a prompt someone else wrote can't know what your story needs next. What transfers isn't the prompt — it's the pattern. There are about five, and once you see them you can generate the other forty-five yourself, tuned to the scene you're actually in.

Pattern one: the concrete action

"She opens the letter." The smallest useful prompt is a single physical act. It moves the scene one beat, hands the model a consequence to write, and imposes nothing else. When a scene stalls, the fix is almost never a paragraph — it's one verb. Concrete beats clever: the model can do something with an opened letter; it can only nod along to atmosphere.

Pattern two: the director's note

"Slow down. Let the silence do the work." "Stay in her head for this." "Cut to morning." These aren't things your character does — they're instructions to the narrator about how to write. Camera, pacing, interiority, where the scene ends. This register is what separates story apps from chat apps; in Underfiction it's a first-class move alongside speaking and acting.

Pattern three: the complication

When a scene is pleasant and going nowhere: add the thing that shouldn't be there. "The lights go out." "Her brother's car is in the drive." A complication resets everyone's want in one line. Withheld specifics work harder than explained ones — "someone in the crowd knows him" gives the model a live wire; explaining who defuses it.

Pattern four: the interior turn

"What is she not letting herself think right now?" Fiction's advantage over film is interiority, and models are genuinely good at it when invited. Use it after a beat lands, not during — action first, echo after. This is the pattern flat, dialogue-only roleplay is missing.

Pattern five: the standing rule

Anything you'd repeat is not a prompt — it's a rule. Person, tense, who writes your character's words, what stays unresolved. Promote it out of the message stream: narration nudges and custom directions in Underfiction, the system or definition field elsewhere. A rule stated once holds; the same sentence pasted every five turns reads as nagging and works about as well.

Why prompts fail

  • Too long — a paragraph of stage directions gives the model ten instructions to obey badly instead of one to obey well. Short, specific prompts win.
  • Asking for quality instead of content — "make it immersive" is a wish. "Rain on the roof, and she can't find her keys" is a scene.
  • Resolving your own tension — if your prompt answers the scene's question, the model has nothing left to write.
  • Fighting the last reply instead of directing the next beat — regenerate or redirect; don't argue.

Start from a trope


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Frequently asked questions

What makes a good AI roleplay prompt?

One clear move the model can build on: a concrete action, a director's note, or a complication. Short and specific beats long and atmospheric — a paragraph of instructions gets obeyed badly; one gets obeyed well.

Should I use copy-paste prompt lists?

As a study aid, not a toolbox. A borrowed prompt can't know your scene. Learn the pattern behind it — action, direction, complication, interiority, standing rule — and write the specific version your story needs.

How do I prompt the AI to write my character's inner thoughts?

Invite interiority after a beat lands: "stay in her head for this." In Underfiction, inner thoughts are a narration nudge you set once; elsewhere, make it a standing instruction rather than a per-message request.