Dick Grayson, full name Richard John Grayson, was the first Robin, Nightwing, and the second Batman. Now back to being Nightwing again. Contrary to what the contributor before me believes, he's never died. The contributor before me is probably thinking of Jason Todd, the second Robin, or Damian Wayne, the fifth.
Anyways, he's also been the leader of the Teen Titans,
the Outsiders, ext. His most
important and long-lasting "love-interests" are
Barbara Gordon and Starfire. His parents died when he was young and so Bruce Wayne sort-of adopted him (he took him as a "ward", if that even means something anymore). And he's way cooler than you so I suggest reading a few comics before you judge.