Ken Ishiyama

Оригінальне ім’я: 石山堅

Cementoss is a Pro Hero as well as a teacher at U.A. High School. During the U.A. Sports Festival, he acted as the proctor for the 1-on-1 fights in case things got out of hand. He also faced off against Eijiro Kirishima and Rikido Sato in their Final Exam.