AI story & roleplay assistant
An AI assistant that plays and writes inside your story
Play your character, and the AI plays everyone else in their own speech styles. Lunafic’s writing engine was first built for professional fiction writing and is now tuned for roleplay.
The direct answer
The AI plays every other character in your story, stays in character, and remembers your world rules.
You play your character, and the scene unfolds in real time with the other characters answering in their own language and personality. The story is also an editor in every world, where you can edit any line like a book. The AI reads every character’s world bible before each reply, so their voices and your story stay consistent across chapters.
See it live
The story engine, running now
This is the story editor. Pick a direction and watch the characters answer in their own language, with the translation under each line.
How it shapes your story
You play, the AI plays everyone else
You write your character’s words and actions. The AI answers as the world and every other character, and MC Mode keeps it from ever writing your character.
World bible and character context
Every character has a world bible with their personality, speech style, and relationships, and the world has its own rules. The AI reads them before every reply, so the voices stay theirs.
Continuous chapter memory
Every scene builds into an organized chapter. The AI remembers what happened early on so long-running stories never lose their continuity.
Or start from a world
Real worlds with real characters
Begin inside a published world where the characters already know who they are.
Private by default
Nobody reads this but you
Your story is yours. We never train AI on your writing. Nobody sees it unless you publish it yourself. In your own private world you can also export your chapters anytime.
Related features
Straight answers
How does Lunafic assist with storytelling and roleplay?
You play your character scene by scene, and the AI writes the actions and dialogue for everyone else based on their world bibles. Characters speak in their own languages with the translation below each line. If a reply is wrong, retry it, remove it, or edit any line yourself. You can continue the story whenever you want, or start another story in the same world, with its own chapters and memory, while the first one stays as it was.
Is Lunafic good for long stories and fanfiction?
Yes, Lunafic is designed for long-running stories and deep roleplay. Chapters keep their order, dialogue layout is handled cleanly, and your turns build into a continuous narrative. You can organize your story across chapters as your world grows, and characters speak their own language with translation right under the line.
Does the AI know my characters and my world?
Yes, and that is what makes every interaction authentic. Before the AI generates a single line, it reads your world notes: each character’s profile and speech style, the relationships between them, and the rules you set for the world. Chapter 20 respects what was confessed in chapter 3. In MC Mode, characters only know what they have learned, keeping secrets and surprises intact until the story reveals them.
Can I copy or download my story?
In your own private world, yes. You can copy your text or export your chapters anytime, with formatting and chapter order intact. In a world someone else built, your story stays in Lunafic for you to play and come back to, and the world itself stays with its author. Zero stories are used to train AI, nobody at Lunafic reads them, and nothing becomes public unless you publish it yourself.
Is it free to start?
Yes, with no credit card required, and stories are unlimited on every plan. Free plays on the Flash model with a monthly amount of AI usage, which is enough to open a world and play your first chapters. Paid plans add more AI usage every month, the Standard and Pro models, and open the Memory dialog, search, and Find and Replace. Start free tonight and upgrade only when your story asks for it.
Your next chapter is ready to unfold.
Pick a world, set the scene, and let the story begin.
No credit card required · Free tier available
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