Monk - Townsfolk

Each night, choose a player (not yourself): they are safe from the Demon tonight.

You will almost certainly be targeted by the Demon if they know who you are. Try to give away your role to as few people as possible, especially early on. Importantly, your ability doesn’t only protect from death, but also from any other effects a Demon may have. E.g. A player protected by you will not be poisoned by a No Dashii for the night they are protected.
You can use other bluffs to try and find out if people have powerful roles that want protecting (e.g saying you’re the Sailor and asking if they would mind you drinking with them).
If there are no deaths at night, resist the urge to gloat immediately! Act surprised and then go and speak to the person you protected. Once the Demon knows a protection role is in play they will be looking for you, so try to stay undercover as long as possible.