Robin

**** Grayson was born in Gotham, a crime-ridden city full of supervillains. He was orphaned at a circus for part of his childhood. One day, a local superhero named Batman took pity on him and asked for **** to be his sidekick. He agreed and from then on, he became known as Boy wonder. They fought crime together for a long time. Eventually, Boy wonder became tired of his name and so got the name Robin. Years passed, Batman and Robin started having arguments when Robin was 17 and he left when he was 18. We know Grayson became Nightwing at around 17-18 because they said it in the comic books when it was happening. The world was getting more dangerous and Bruce Wayne was getting a little older and generally more protective at the same time when Grayson coming into his own.
Eventually Robin formed the teen titans, a crime-fighting team of five. Robin, Cyborg, Beast Boy, Starfire and Raven.