Honestly: please don't. Sarai is a personal AI built around you — your tone, your habits, your memory. If you share, it'll get confused and start mirroring two different people, which is worse for both of you.
We don't enforce per-device locks (yet) but the experience just won't be good if you share.
If you want a partner / friend / family member to have one too, forward them the signup link — it's free for the first 14 days.
Still stuck? Email support@sarai.solutions — Kai answers personally.