Sadamitsu the Destroyer

Tsubaki Sadamitsu is a young delinquent and the leader of the Corpse Gang, who after a chance encounter with an alien robot is forced to take up the task of capturing intergalactic criminals named Exiled Ones. His job is made harder with the appearance of the Vulture, a last-ditch effort to keep the Exiled Ones under control.

(Source: Wikipedia)