The noppera-bou, or "no-face," chooses a team and then becomes a copy of that role. Because they perform their action first, this means that they will be able to perform their new role's night action. The noppera-bou is on the side of whatever role they become. If they become a wolf, they win if all the wolves (including themselves) survive. If they become a seer or anything else, they win if at least one wolf is found. If they become an onryou, they win if they are killed.
If the noppera-bou becomes a wolf, they will be included in the wolves' night post and see who the other wolves are. No other role has a shared night post.
If the noppera-bou becomes an onryou, they only win if they themselves are killed, not if the other onryou is killed. If both onryou are killed, then both win.
In the case of overlapping night actions (for example, if the noppera-bou becomes a troublemaker, and both the noppera-bou and the troublemaker include the same team in their switches) the original role's action will be applied first, and then the noppera-bou's.
のっぺら坊
If the noppera-bou becomes a wolf, they will be included in the wolves' night post and see who the other wolves are. No other role has a shared night post.
If the noppera-bou becomes an onryou, they only win if they themselves are killed, not if the other onryou is killed. If both onryou are killed, then both win.
In the case of overlapping night actions (for example, if the noppera-bou becomes a troublemaker, and both the noppera-bou and the troublemaker include the same team in their switches) the original role's action will be applied first, and then the noppera-bou's.