A third-year student in class 3-B, and one of the "Big 3" known as the top students at U.A High School. He has a very optimistic attitude and is always smiling brightly. His Quirk is "Permeation" where he has the ability to allow physical matter to phase through his body. He interns along with Izuku Midoriya under the pro hero Sir Night Eye. Ages 12 and up.