Ken Ishiyama

Cementoss is a Pro hero and one of the staff at Yuuei, he teaches Modern Literature.

Appearance
Cementoss appears to be a humanoid block of cement.

Personality
Cementoss can be serious when its necessary and can quickly change to a happy fan.

Ultimate Space & Jams Arc
At the end of the arc, he appears with alongside the other Pro Heroes. When Eijirou Kirishima runs over to see if All Might was ok, he uses his Quirk Cement to create a long cement wall to stop him from seeing All Might's true form.

Sports Festival Arc
Cementross is seen creating the ring for the tournament event, which Present Mic thanks him for. After he creates the cement ring, Cementross makes a cement chair for himself to sit on so he can act as the proctor for the tournament event.

During the fight between Izuku and Shouto, Cementoss contacts Midnight and asks her if he can stop their fight, saying that Izuku's injuries are serious and that even Recovery Girl won't be able to heal his injuries fully in a single session, noting that if Izuku was able to even win he wouldn't be able to fight properly in the next match.

Quirk
"Cement" - Cementoss's Quirk allows him to control cement he touches, really useful in a city environment.

All Might
He loves meeting All Might all the time.

Trivia

 * He's a big fan of All Might