Choose the character voice
Start from a system character or a custom character you created from an avatar, notes, and editable profile fields.
AI character chat
AI character chat that can grow into a group
Start with one AI character, shape a custom voice, and expand into group chat or story scenes.
Direct answer
What this experience is
Start in a private one-character chat, then move the same fictional character into a multi-character room when the scene needs more voices. This is not public or multi-human chat.
How this experience works
Start with one character; open a room when the scene needs more
| Core experience | One fictional AI character can stay in a private thread or join group and story modes. |
|---|---|
| Who participates | Group mode contains one human user and multiple AI characters. |
| Multiple real people | Not supported. TheirSide is not real-time multi-human chat. |
| Conditional media | Avatar generation, image tools, and voice options appear only when the account and environment support them. |
What it is
A character chat space for imaginary characters
AI character chat lets you talk with an invented persona, explore a scene, test a fictional character voice, or prepare a custom character before putting them into a group chat.
How it works
How AI character chat works
Give the character context
Share the mood, scene, question, or writing problem you want the character to respond to.
Keep building privately
Use the conversation for entertainment, writing sparks, personal exploration, or as a warm-up before AI group chat.
Use cases
When AI character chat is useful
- Trying a character voice before writing or joining a scene
- Exploring an imaginary relationship or conflict
- Creating a custom character from avatar and profile material
- Keeping entertainment chats separate from public social spaces
Writing dialogue
Use AI character chat to test written dialogue
Treat the chat as a small rehearsal room: give the fictional character a scene objective, ask for a line, then compare the reply with the voice and boundaries you intended.
- 01
State who is speaking, what they want, and what just happened in the scene.
- 02
Ask for a reaction or alternate line instead of requesting an entire finished story.
- 03
Keep, rewrite, or reject the output yourself; the reply is a creative draft, not an authored fact.
One character
Start privately and stay fictional
- Private by default
- The conversation stays in account-controlled chat history rather than becoming a public post.
- Fictional by design
- Use invented characters, not unauthorized versions of real people.
- Open the room later
- Add more AI voices or enter a story scene only when the moment needs them.
Boundaries
Clear limits keep the experience understandable
TheirSide is for fictional character conversations, entertainment, and creative exploration. Conversations are private and account-controlled, with account deletion available for personal chat data. It is not professional advice, a public publishing platform, or a way to misuse real people's likeness, voice, identity, or protected material.
FAQ
AI character chat FAQ
What is AI character chat?
It is an AI conversation with an invented fictional character voice for entertainment or creative exploration.
Can I use it for writing?
Yes. It can help with scene ideas, dialogue tone, character reactions, and worldbuilding sparks.
Is it public?
TheirSide is designed around private conversations and account-controlled chat history.
Can it become a group chat?
Yes. TheirSide also supports AI group chat when you want more than one fictional voice in the room.
Start privately