Nightwing
Nightwing is a fictional superhero appearing in American comic books published by DC Comics. The character has appeared in various incarnations, with the Nightwing identity most prominently being adopted by Dick Grayson when he moved on from his role as Batman's vigilante partner Robin.
Dick Grayson
After spending some time away with Bruce and Tim to heal and rebuild after their harsh times prior to the Crisis, Dick relocates to New York, but has trouble finding work as both Dick Grayson and Nightwing. During the "Batman R.I.P." storyline, Nightwing is ambushed by the International Club of Villains. He is later seen being held in Arkham Asylum, where one of the surgeons, in reality also the civilian identity of ICoV member Le Bossu, arranged for Nightwing to be admitted under the name of Pierrot Lunaire (another ICoV member) and be kept both heavily drugged and regularly beaten by staff to subdue him. Scheduled for an experimental lobotomy by Le Bossu himself, he manages to free himself and come to Batman's aid for the finale of the story arc.