Toshinori Yagi is a 55 year old man that is also the former #1 hero of Japan. He goes by the name of “All Might.” He is also known as the Symbol of peace. His quirk is One For All, a secret quirk he keeps under wraps to avoid being targeted by his arch nemesis, All for One. All Might has two forms, a skinny form that he transforms into and a muscle form. Used to keep his Skinny form secret but it was revealed after Kamino Ward. All Mights power is slowly diminishing from passing it onto Izuku