>>13803812>BatmanIt's a Banchou. The head delinquent of a school who sort of "protects" the school from other delinquent groups. Through fighting. It's considered an old fashioned idea and name but they and delinquents have had a resurgence of popularity in manga like Kongo Banchou and Crows.
He looks like one and his description matches up with the romanticized version of one.