Ken Ishiyama (石 いし 山 やま 堅 けん Ishiyama Ken?), also known by his hero name Cementoss (セメントス Sementosu?), is a Pro Hero and member of the U.A. High School faculty where he teaches …

Ken also known as Cementoss, is a Pro-Hero and one of the staff at U.A.. He teaches Modern Literature. Read more information about the character Ken Ishiyama from Boku no Hero Academia? …

Dec 22, 2025 · Ken Ishiyama’s Quirk is Cement. This Quirk allows him to freely control the viscosity and shape of any concrete he is touching. He can liquefy, solidify, and reshape concrete at will, turning …

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 1on1 fights in case things got out of hand. He also faced off against Eijiro …

Ken Ishiyama (石山堅 Ishiyama Ken), also known by his hero name Cementoss (セメントス Sementosu), is a Pro Hero and member of the U.A. High School faculty who teaches Modern Literature.

"You don't have to worry about his report," Cementoss said, "If ignorance is a crime then I'm afraid all of us need to be put away. We all committed that once or twice as youngsters."

Cementoss acts as the proctor for the fighting tournaments. During the fight between Izuku and Shoto, Cementoss contacts Midnight and asks her if they should stop their fight because of Izuku's reckless …