The Arkham Knight

Charlene Walter, A.K.A. The Arkham Knight is the tritagonist of Mutatron: The Maestro Of Mayhem! She is a Gotham University Student-turned-TITAN test subject and the successor to Jason Todd as the wearer of the mantle of The Arkham Knight, as she intends to use this alter-ego to make the Knight into a symbol of honor and justice. She aids Harry in finding out who framed him in exchange for a cure to her monsterous condition. She will be voiced by Anne Hathaway.

Charlene's Backstory
Before she was The Arkham Knight, she was simply a normal human being named Charlene Walter...who didn't have just a bad day, but a really bad childhood. In the days before she was born, her mother used to beat her father unmercifully a lot, not just because the stress and rage that occurs during her pregnancy, but also because her disgust toward what Charlene's father used to be, which was technically a criminal.