nightmare!sans was the leader of the group he is the black goopy skeleton, and this is his castle btw, Error!sans is the glitched skeleton he has haphephobia the fear of being touch he is also rude, Horror!sans is the one with a crack on his head, he eats humans, Cross!sans is the one that was a red scar under his right eyes he is quite, Killer!sans is the one with a black liquid coming out of his empty eye socket and Dust!sans his is the one wearing the orange scarf and a hood on.