Lucifer!!!!!!!! YES! Annoyingly beautiful, Lucifer is a terribly good anti-hero, babying you into forgiving him, even though he tortured one of the main characters because he was bored. He shows a sarcastic viewpoint on this show, and is loved by many fans.
Yeah but this isn't funny. Look at him. He says Lucifer leaves him alone most of the time but he's hiding, he doesn't care, such disregard for his own life is so heartbreaking. He smiles when Crowley tells him Dean wants him to cast Lucifer out but he does nothing. He has given up, and it's so painfully sad.