Open Settings → Account → Assistant Configuration:
- Active Persona: pick the assistant you talk to. The built-in one helps with your notes; others have their own style.
- + Create New Persona: give it a name (Name (e.g. German Tutor)) and System Instructions: how it should talk and what to focus on, for example "Speak slowly and correct my German". It can still search and create your notes.
- Voice Language: the language it listens and speaks in.
Your instructions are sent with each voice chat so the AI follows them; don't put personal secrets in them.
To remove an assistant you made, tap Remove next to it.