Batman, in most of his incarnations, is a dark and brooding hero with a personal vendetta against crime and injustice. Psychologically traumatized by the death of his parents, Batman has sworn to rid Gotham from the criminal elements that took his parents away from him. He is extremely pessimistic and suspicious, which often makes it difficult for him to trust people other than Alfred, Commissioner Gordon, the Robins or the Batgirls.