Quartermaster

Ability

Each night, you learn a different Agent role (not yourself) that is in play, until there are no more left to learn.

John is the Analyst. The Quartermaster wakes up and learns that the Analyst is in play.
The Quartermaster wakes up and learns the last Agent role in play, and stops waking up on future nights. Later in the game, Jane, who was not an Agent, becomes a Clairvoyant. The Quartermaster wakes up and learns that the Clairvoyant is in play, and then once again, stops waking up on future nights.
The Quartermaster is malfunctioning. Nobody is the Coordinator. The Quartermaster wakes up and incorrectly learns that the Coordinator is in play.

The Quartermaster’s ability is very useful for verifying the claims of other players, but it can take a long time! Try doing whatever it takes for you to stay alive.
You can try to confirm your role as the Quartermaster by outing the roles you have learnt. If a player has a role you claimed to have learnt, they might be more trusting of you.
You can try to get players you trust to intentionally claim your role, so that they might be targeted instead of you.

Each night, wake up the Quartermaster. Tell them an Agent role that is in play different from the last, until there are no more left to learn. Send them back to sleep.
After they have seen all previous Agents, if a new Agent is made later in the game then wake them up to tell them the new Agent role that is in play.