Jean-Paul Valley "“ Azrael

You know that Order of St.Dumas from TV series "Gotham"? Well Jean-Paul Valley, a.k.a. Azrael, was one of their agents who was subjected to complex mind conditioning, and thus was programed to follow the order's bidding. Luckily, Bruce and Alfred managed to help him regain his free will, and he became Batman's apprentice. During the events of Knightfall, when Dick Grayson refused to be Batman, Azrael was the one to rise to the challenge. Unfortunately, he became blinded by power and thought he could become a better Batman, so he changed his methods and became more sadistic. Bruce could not allow this Knightfall Batman to run rampant, so he stopped him and asked Dick Grayson to fill in for a while.