All Might
Toshinori Yagi, more commonly known by his hero name, All Might, is the tritagonist of My Hero Academia, and the arc protagonist of the Hideout Raid Arc. All Might is the former No. 1 Pro Hero who bore the title of the world's Symbol of Peace. He teaches Foundational Hero Studies at U.A. High School.
All Might was the eighth holder of the One For All Quirk after receiving it from Nana Shimura. He has since passed the torch to Izuku Midoriya, whom he is training to be his successor. After using up all the embers of One For All to defeat All For One, All Might retired and ended his era as the world's greatest hero.