Nightwing

Nightwing also known as Dick Grayson and Robin is a founding member of the Justice League. He is Jason Todd's predecessor as Robin. He was portrayed by Jack Hillebrecht in all of his appearances from 2011-2013, and has been portrayed by LordStarscream100 in all subsequent appearances.

Background
Dick's first canonical appearance was in Battle for Hogwarts part 3: Harry's Destiny, as he fought in several battles for Hogwarts, as Robin. He and Batman took down the rioters in the infamous Riot of 2012, with some help from Superman, He, along with Batman, Superman, Wonder Woman, and Aquaman founded the Justice League in 2013. He played a major role in repelling the Kryptonian Invasion, so much so it proved to Batman he was ready to go out into the world on his own. After Batman's temporary exile once blamed for the apparent murder of Superman, Robin became the hero known as Nightwing, and continued to participate in the Justice League, and was likely involved in the early training of Jason Todd. He fought in The Battle of Gotham City.