Tim Drake is the third person to take on the identity of Robin following Dick Grayson and Jason Todd. Before taking up the mantle, Tim actually deduced the real identities of Batman and Robin, having seen Dick Grayson perform at Haley's Circus with the Flying Graysons and matching his acrobatics with Robin. And just like Dick, Tim also became an orphan following the passing of his parents.
Tim was trained by Batman and sent around the world to be trained by masters, including in multiple forms of martial arts. His weapon of choice is the staff.