Another set of homebrew characters

I’ve redone past homebrew characters that I made that kind of broke the rules on its own and weren’t that powerful along with newer ideas. I would like to see your thoughts on them as to how they could be improved.

[O] Ghost - All evil players know who you are. If just 3 players live and you’re one of them, evil wins.

[T] Matchmaker - You start knowing 2 players that are on the same team.

[M] Sleeper Agent - You start knowing a secret word. When a good player says the word, you learn a new word tonight, then choose a player: they die.

[D] Etherspring - Each night, choose a player: they are poisoned. When the poisoned outnumber the healthy, all but one poisoned player dies.