Nightwing's history stretches back to the Golden Age of Comics. Nightwing was the first sidekick in comics, learning the ropes from Batman as Robin. Dick Grayson is an integral part of comic history, creating a mantle that has stood the test of time and becoming an amazing hero in his own right. DC didn't always give Nightwing the respect he deserves, but that has changed in recent years. Nightwing has proven just as important as members of DC's Trinity, and he's a solid leader in the DC superhero community.
Source：https://www.cbr.com/best-nightwing-lore-dc-comics/
