Harvey Dent (Aka Two-Face) is a former District attorney of Gotham, but now a professionial criminal. He is voiced by Richard Moll.
Rupert Thorne, a mob boss learned of Harvey Dent's other side and knew if it was exploited it could ruin Dent's career. When a fight ensued between Dent and Thorne's menk, a freak explosion destroyed the left side of Dent's body. The trauma was powerful enough to force his alternate personality to dominate, and left in state where right and wrong no longer held any meaning. He becomes Two-Face. In The New Batman Adventures Two-Face became a more deadly adversary to Robin (Tim Drake), who harbors a deep, personal resentment toward Two-Face, as his father, Stephen "Shifty" Drake worked for him.