Damian Wayne is the son of Batman and Talia al Ghul. This makes him an heir to the world's greatest crime-fighter, and its greatest super-villain Ra's al Ghul. Damian became the fifth Robin, working alongside his father as Batman.
Arrogant, cold and undeniably lethal, he found the transition from the unforgiving world of the League to Batman's staunch moral code to be a long and trying process, but a worthwhile one, as Damian ultimately proved himself worthy of becoming Robin.