Start from a face and a short brief
Upload an authorized portrait and add notes, a small bio, or a scene prompt. TheirSide helps turn that material into a custom fictional character profile.
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AI character creator for custom character chat
Upload a portrait. Enter the room.
Direct answer
What this experience is
Signed-in users can turn authorized material into a private fictional character, review the generated profile, and use that character in chat. Media options remain conditional.
How this experience works
Turn authorized material into a character you can review
| Core experience | Create a fictional profile, review it, then use the character in Character Chat, group, or story chat. |
|---|---|
| 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 you can build
A character is more than a profile card
Generate avatar candidates when enabled
Use the uploaded portrait directly or create styled avatar options where image generation is available for your account and environment.
Bring the character into chat
Created characters appear in your workspace so they can chat individually, join freeform AI group chats, or take a role in a scene script.
Workflow
From upload to playable character
Upload avatar
Use an image you have the right to use. The creator keeps consent visible before upload.
Shape the profile
Generate or edit name, personality, boundaries, style, and the parts that make the character recognizable.
Choose media
Pick the uploaded avatar or a generated candidate, preview voice options, and submit an authorized sample on supported plans.
Start chatting
Use the character in AI character chat, group chat, and story-style scenes.
Field guide
Separate required from optional before generating the profile
Upload an authorized avatar, attach an optional source document, then generate. Review every required field and the selected avatar before you confirm.
| Authorized avatar (required) | Use an original fictional portrait you have the right to use, then confirm consent before upload. |
|---|---|
| Source document (optional) | Attach the planning template as Markdown, then click “Generate profile with AI.” Choosing a file alone does not import it. |
| Name (required) | Mara Venn |
| Gender (required) | Female |
| Personality summary (required) | Patient, observant, and dryly funny; becomes direct when a detail is hidden. |
| Habits (optional) | Logs the time before asking a question; turns a brass compass over in one hand. |
| Likes (optional) | Accurate records, rain against carriage windows, mint tea. |
| Boundaries (optional) | Stays fictional, refuses impersonation, and does not invent private facts about real people. |
| Avatar choice (required) | Choose the uploaded portrait or an available generated candidate before confirmation. |
Review before confirmation
- 01
Attach the template Markdown as an optional source. Selecting it does not import anything yet.
- 02
Click “Generate profile with AI” to upload the attached document, when present, and generate the profile.
- 03
Revise the generated name, gender, personality, habits, likes, and boundaries; then review the avatar.
- 04
Confirm only when everything is ready. The current product has no profile-edit endpoint after confirmation.
Want to prepare before signing in? The browser-local workbook has nine planning fields, a complete example, Markdown copy, and versioned JSON download. Its fields differ from the creator wizard.
Open the no-login character profile templateAfter creation
Create, test the voice, then bring it into the room
- Create
- Review the profile and selected avatar before confirmation.
- Test the voice
- Start with Character Chat before opening a group.
- Open a room
- Mix system characters and your own characters in one shared conversation.
- Enter a scene
- Assign a created character to a scene role when the setup needs specific tension.
- Keep control
- Delete your account and personal chat data when you need to leave the workspace.
FAQ
AI character creator FAQ
Can I upload any avatar?
Use only images and materials you have the right to use. TheirSide keeps this consent boundary visible in the creator.
Can the character join AI group chat?
Yes. Created characters work in character chat, freeform group chat, and scripted scenes in the same workspace.
Does avatar or image generation always run?
Image and avatar generation depend on account access, feature flags, and provider configuration. The creator falls back to the uploaded avatar when generation is unavailable.
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