Crew
The small group holding the line.
Crew is not status. It is responsibility. Someone holds the room. Someone keeps the memory. Someone reminds us what we said we would try next. That is the role, until the culture holds itself.
Steward
Seat open
Holds the standard while the room's culture is still taking shape.
Host
Seat open
Rotates between members. Holds the room, keeps time, and makes sure the quieter voices get the air.
Memory
Seat open
Writes up what each member commits to try next. Sends gentle reminders so the momentum does not evaporate.
These roles are responsibilities, not status. See item IV of the manifesto for the reasoning.