Toshinori Yagi (八や木ぎ俊とし典のり Yagi Toshinori?),And in this ua Toshinori yaga is 29 also known as All Might (オールマイト Ōru Maito?), is the former No. 1 Pro Hero who bore the title of the world's Symbol of Peace (平和の象徴 Heiwa no Shōchō?). 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 onto 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.[2]