Vigilante: Boku no Hero Academia Illegals is a manga set in the My Hero Academia universe, focusing on the story of Koichi Haimawari, a young man with a modest Quirk who becomes a vigilante. Set five years before the main events of My Hero Academia, Koichi, along with other vigilantes like Knuckleduster and Pop Step, takes justice into his own hands outside the law. Written by Hideyuki Furuhashi and illustrated by Betten Court, the series ran from 2016 to 2022, spanning 15 volumes. It explores themes of heroism, justice, and the complexities of using Quirks for good.