Henry Pym (Ultimate Marvel)

Henry Pym (also known as Ant Man) is, of course, a hero from Marvel comics - however there is a dark side to Henry which can not be ignored: especially that of his earlier days in Ultimate Marvel.

Although always fighting on the side of "good" Henry Pym was an abuser, beating on his mutant wife Janet, this behavior tarnished his character considerably and resulted in the end of his marriage as well as his temporary removal from the Ultimates.

Eventually however Henry would return to the Ultimates under the guise of Yellowjacket and has been a hero (more or less) ever since.