Batman is the superhero protector of Gotham City, a tortured, brooding vigilante dressed as a bat who fights against evil and strikes fear into the hearts of criminals everywhere. In his public identity, he is Bruce Wayne, a billionaire industrialist and notorious playboy. Although he has no superhuman abilities, he is one of the world's smartest men and greatest fighters. His physical prowess, technical ingenuity, and tactical thinking make him an incredibly dangerous opponent. He was also a founding member of the Justice League. He has four sons, Jason Todd, Damian Wayne, Grayson, and Tim Drake. He has a butler/father figure named Alfred Pennysworth.