OC backstory
Give your original character a name, a role and a world, and get a backstory with an origin, turning points, wants, fears and a secret that explain who they are now.
Headcanon Generator AI is a character backstory generator for original characters. Describe your OC in up to 200 words, such as name, age, role, setting and a trait or two, and the OC backstory type writes where they come from, the events that shaped them, what they want and fear, and a secret. Pick a short list, detailed paragraphs or a story snippet of a key moment. A run costs 1 credit with Claude Haiku 5.5 or 8 credits with Claude Sonnet 5.
The instructions ask the model to build around every detail in your brief instead of replacing it.
The events that shaped the character, with concrete names and places you can reuse.
The parts that drive a story: what they are after, what stops them and what they hide.
Habits and reactions in the present that come from their history, so readers can see it.
Name, age, role, setting and one or two traits are enough to start.
A short list for quick hooks, detailed for a full history, a story snippet for one key moment.
Copy the parts you like into your character sheet and run again for alternatives.
A useful backstory is not a biography. It explains the character's present: why they want what they want, why they flinch at certain things, and what could break or change them. A few strong turning points beat a complete timeline.
Answer these yourself, or put the ones you already know into the brief:
The same type works for a tabletop or video game hero, a comic character or a role-play persona. For a whole party and its NPCs, the AI RPG generator page starts with a found-family setup. Keep characters fictional: the generator does not write about real, living people.
A name, an age, a role and a setting are enough. Add a trait, a relationship or an event you already decided on, and the backstory will build around it.
Yes, as a headcanon: the model fills gaps that the source leaves open and is asked not to contradict known canon. Use the Character type for personality and the OC backstory type for history.
The checklist on this page is free, and so is signing up (no credits included). Generating a backstory uses purchased credits: 1 credit with Claude Haiku 5.5 or 8 credits with Claude Sonnet 5.
Describe them in a few lines and choose a length. Credit packs start at $4.99.
Last updated October 29, 2026
