Oncilo · WithenAI Limited

Stories that answer back.

A character-led space for roleplay, storymaking, and the evolving relationship between people and intelligent systems.

What Oncilo is

A character-led space for play and storymaking.

Characters with a voice

Original characters and groups that stay in role, hold onto the story, and answer in a voice that is unmistakably theirs.

Storymaking, together

Shape scenarios, worldbooks, and opening scenes — then step inside and let the story unfold around you.

Remix, don’t start over

Take any story or character and remix it into your own version. New rules, new turns, same soul.

Inside the app

Your cast, your rules.

Oncilo is built around the people in the story — the ones you meet, and the ones you make.

  • Discover characters, groups, and stories made by creators.
  • Chat in character with casts that stay consistent.
  • Build scenario settings, worldbooks, and opening scenes.
Oncilo home screen showing a grid of characters and stories
Oncilo conversation detail screen for The Riftbound Accord

From the library

Stories already taking shape.

Original scenarios and characters from the Oncilo library.

  • Cover art for Familiar Feedback
    Male audience · StoryFamiliar Feedback
  • Cover art for Mana on Trial
    Male audience · StoryMana on Trial
  • Cover art for The Healer’s Margin
    Male audience · StoryThe Healer’s Margin
  • Cover art for Field Hospital Zero
    Female audience · StoryField Hospital Zero
  • Cover art for The Harbor King’s Last Vote
    Female audience · StoryThe Harbor King’s Last Vote
  • Cover art for The Knight of the Missing Hour
    Female audience · StoryThe Knight of the Missing Hour

Product information

Product information and policies.

Privacy Policy

How Oncilo processes account, content, AI request, and service data.

Read the policy →

User Agreement

The rules governing accounts, AI output, content, crystals, and use of Oncilo.

Read the agreement →