Black

Unlike most of the other Impostors and Crewmates seen, Black doesn't speak. However, it's obvious that they are very bloodthirsty and sadistic, as many body parts of both Boyfriend and Crewmates are seen in their song Defeat. Black is also very determined, as they chase Boyfriend and Girlfriend across the Airship in an attempt to kill them. That said, their patience is not without its limits, as they scream in frustration after the duo evade their wrath after a certain amount of time. Black is also very intelligent and strategic, being able to ambush and kill an entire room of crewmates (Boyfriend and Girlfriend included) by sabotaging the lights immediately after jumping out of the vents, albeit with some help. They also incredibly manipulative, as demonstrated when they convince everyone to vote Gray's father to be executed. By further extension, Black raises Gray, a crewmate to become a murderer like them, turning the child insane as he grew older. While they work with other Impostors and murderers, such as White, or their adoptive child, Gray, nothing states or implies Black cares for any one other than themselves. An example of this is shown in an unused cutscene where White and Black find Red's body shortly after he was voted as the Impostor. While White was disturbed by this turn of events, Black simply nudges them with their fist, showing how little they care for the other Impostors.