Purple

Alternate name: Xavier

Species: A goo/shapeshifter monster. Able to imitate other shapes easily. Disguise is generally good unless you stab/cut/prod it too hard. While the spacesuit is part of his disguise, he's also capable of looking human and taking helmet off.*

Primarily eats meat, but will eat the odd vegetable now and then.

Attacks: Can break disguise and take a big bite out of crewmates. Also carries a knife.

Gender: Genderless, but uses he/him to his crewmates. Gender isn't a big deal for his species, so he doesn't think about it much.

Motivations: Survival is a big part of his motivations. He wanders between cultures/crews and blends in. He's not one to usually form close bonds, though sometimes he would like to, it's just hard figuring out who to trust.

*How much among us beans are just beans and how much they are people is somewhat up for debate, so Purple's canon is meant to be a little bit flexible in that regard.