What other charachers in Finn the Human?(Besides Finn,Jake,and The lich)

It can be the ninja guy( I don't know his name) but most of human are mutants because of the toxic или things like that

There's Farmworld Marceline and if Ты count a dead character...there's Simon

Well the there was choose Bruce или something like that. Which is choose гусь in Ooo.

Well' Marcilene use to be human until she got bit by a vampire......does that count???