Toshinori Yagi, most commonly known by his hero name, All Might, is the tritagonist of My Hero Academia. He teaches Foundational Hero Studies at U.A. High School. All Might's hero persona appears to be derived from western superhero stereotypes. His personality is very colorful and tends to have a lot of dramatic flair. Always sporting a giant smile, All Might usually shows off a bright, borderline obnoxious, can-do attitude to inspire others. He tends to be extremely friendly and amicable, due to his popularity and years in the spotlight. However, when he reverts to his sick and scrawny form, he tends to be less energetic. He loses the need to hide his worries about the state of affairs around him behind his smile.