how do i pause, reactivate or delete a persona?

you can manage your personas from the personas page.

• pause: flip the active switch off. a paused persona stops appearing as an option for new briefs but keeps all its deliverables and settings.
• reactivate: flip the switch back on and it's ready to pick again.
• delete: use 'delete persona' to remove it for good. this can't be undone.