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
Fictional character chat on TheirSide lets one human user talk with one AI character, then move that character into a room with multiple AI characters; it is not a public or multi-human chat service.
Capabilities and limits
What TheirSide supports—and what it does not
| Experience on this page | A user can begin with one fictional AI character and move into group mode when the scene needs multiple AI voices. |
|---|---|
| Group mode participants | In group mode, one human user converses with multiple AI characters. |
| Real-time multi-human chat | Not supported. TheirSide is not real-time chat between multiple human participants. |
| Optional media features | Avatar generation, image tools, and voice options are available 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.
Why TheirSide
Built around private fictional conversations
Private by designTheirSide is built for account-controlled chat history, not public posting.
Fictional boundaryThe product describes and supports imaginary characters, not unauthorized real-person impersonation.
Room to expandYou can move from one-character chat into AI group chat or scripted story scenes when a moment needs more voices.
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