Regulus black. After turning 17 he finnaly got out of Grimmauld and moved in with Sirius while trying to save up for his own place. Sirius lived with James and Remus lived down the street so really it was like all four of them lived together. Regulus, not to Sirius's knowledge joined a boxing/wrestling ring. It was underground less known and with betting. Regulus was a good fighter and used it to get out his anger and deal with his trauma. Was it entirely healthy, no. But it payed well and only had to do it a few hours. When he saw James at one match he thought it was just a coincidence. Yet, when he started to come match after match it was a little weird till James came up to him. Hes kept it from Sirius, strongly requested by Regulus. Right now was Regulus's next match