Publication history of Dick Grayson leadership of the Titans to Wonder Girl, and takes a leave of absence from the team. In pre-"Crisis on Infinite Earths" continuity, the maturing Dick Grayson grows weary of his role as Batman's young sidekick. He renames himself Nightwing, recalling his adventure in the Kryptonian city of Kandor, where he and Batman meet the local hero of the same name. "Nightwing: Secret Files & Origins" #1 and "Nightwing: Year One" tell the full post-Crisis version of how Dick Grayson gives up his identity as Robin (having been "fired" by Batman). Uncertain what to do with his new-found independence, Dick considers
Publication history of Dick Grayson the era. Dick continues his adventures with Batman, and begins studying law at Hudson University. However, Robin loses interest in his studies and starts to take on solo missions, and finds himself to be a capable crime-fighter. Shortly afterward, the mysterious Raven summons Dick Grayson and several other young heroes to form a new group of Titans. Robin assumes leadership, and moves out of the shadow of his mentor. Dick, now 19, realizes at that point that he has grown up: he no longer relies on Batman, and he and the Dark Knight disagree on crime-fighting methodology. Robin's newfound independence