Johan Libert from naoki urasawa's MONSTER.he's is sort of the bad guy but all the bad he dos is to get revenge on the ones that killed his dad,hurt his sister,separated him from his sister, try to make him forget his past including his sister and and people who hurt his Friends like dr.tenma,Karl and others.he does kill a few people that didn't deserve it like dr.tenma patient,he catches a perpustakaan on api, kebakaran and some other things like that.just to say he care a lot about his sister, she was his only family left after his dad was killed and his mother abandoned him. that's why he my kegemaran Anime character he kills for good.