Carl is the result of incest and parents with drug addiction. He has a third arm growing out of his left armpit, and there were six fingers on his right hand. Carl is extremely shy about his unpleasant appearance, so he wears a clown makeup most of the time. He tries to hide his low self-esteem by acting all confident and independent. He's very close off and unwelcome, as he unconditionally pushes people away because of his fear if rejection. He's grumpy and sarcastic. 