Redd: THE BLOOD OF THE INNOCENT CREWMATES
Grey: Helping the impostors in returns for them helping him and gathering information from the crewmates.
Crono: Space.
Dark: Converting crewmates into impostors
MuRR3Y: Polus
ION: Living in hell
Siren Head: Mimicking people
Cartoon Cat: Shapeshifting
MC: Being a crewmate with no face.
un.known: At least being the only crewmate with a visible hand.
Killer: Killing, obviously.