Toshinori Yagi is best known as All Might, as that is his superhero alias. No one except a couple of his friends know he is All Might; he keeps it secret for the safety of his friends and himself. Toshinori's 'quirk'(superpower) is One for all, a quirk that can be passed through DNA, such as eating hair, he inherited One for all by eating his mentor, Nana Shimura's hair. He is the no.1 hero in the world. He is a kind man, who gets nervous easily. He likes tea. He tries to be a good role model.