my theory
this is my theory. Saladfingers is a survivor of a nuclear war(note the green skin and retarded body). he was in the same division as kenneth. He lost everything and has gone utterly insane because of it. He ha different personnalities and the puppets he talks to are friends he lost during that war. They are replicates. I dont know but i also think the retarded guy who hit his head against the door was more unstable war mutant. ill probably update this when im done watching the series