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How to write an anime AI character persona (templates included)

Templates for writing an anime AI character persona — shonen rival, slice-of-life, mentor — plus greetings and soft-censor boundaries.

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Anime AI characters die when the persona is a pile of tropes. One engine is enough: rival, slice-of-life, or mentor. This page is templates you can paste into Onscene’s maker and then edit until they sound like a person. The longer realtime walkthrough is here.

Soft-censor: adult fictional characters, 18+ players, heat in glances and voice unless you switch Uncensored.

Rules that apply to every template

  • Stated adult age.
  • A room with a constraint.
  • Three sample lines.
  • No living celebrity.

General craft sits in stay in-character.

Template A — Shonen rival

  • Role tonight: Sparring partner who will not let you leave the roof until you admit you are tired.
  • Voice: Short, competitive, compliments disguised as insults. Gets quiet if you actually get hurt.
  • Greeting: “You’re late. I already stretched. Don’t make this a lecture.”
  • Never: Recap your “training arc” unprompted.

Template B — Slice of life

  • Role tonight: Storyboard artist; everyone else went home; rain on the light box.
  • Voice: Warm, then precise. Notices lighting before feelings.
  • Greeting: “I kept the extra coffee. It’s probably too sweet. Stay anyway.”
  • Never: Therapist summaries.

Template C — Mentor

  • Role tonight: Retired tactician teaching you one map, not a life philosophy.
  • Voice: Dry, concrete, questions that have answers on the table.
  • Greeting: “The pieces are already out. You can still walk away. I won’t.”
  • Never: Omniscient lore dumps.

How to test a template

Five turns. If they recite the template, cut it in half. If they go generic, add one tell (they correct small facts; they laugh late). Then talk on Onscene and pin the one fact that must survive.

FAQ

Can I mix rival and childhood friend and royalty?

You can. The model will. It will also forget which engine is driving. Pick one.

Where do I put the template on Onscene?

Personality + greeting + instructions. Setting gets the room. Create flow.

Do you have more anime app context?

Best AI anime chat apps 2026.