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.
Jason Todd
Jason Todd resurfaces following the "One Year Later" period, patrolling the streets of New York City as a murderous version of Nightwing. However, Jason shows no intention of giving up the Nightwing persona when confronted by Dick Grayson, and continues to taunt his predecessor by wearing the costume and suggesting that the two become a crime-fighting team. Not long after the two Nightwings meet up, Todd is captured and imprisoned by local mobsters Barry and Buddy Pierce. Grayson reluctantly rescues him, and the two join forces to defeat the Pierce Brothers. Shortly afterward, Todd leaves New York City and the Nightwing mantle to Grayson, along with a telegram telling Grayson he has returned to normal and still considers himself a gift from Batman.