This article is about the U.A. High teacher. For the Pro Hero known as Rock Lock, see Ken Takagi.
Ken Ishiyama, also known by his hero name Cementoss, is a Pro Hero and member of the U.A. High School faculty where he teaches Modern Literature.
Appearance#
Cementoss appears to be a humanoid block of cement with black, seemingly shut eyes and gray hair tied into a short ponytail. His body shape is evenly blocky all around his body. His eyes are generally closed (but tiny when opened) and his lips are pulled upwards. His hero costume consists of a sleeveless brown suit that includes yellow stripes, shorts, and an elongated collar. He also sports gray shoes with yellow soles.
Following his battle against Geten, he now has a scar on his left arm and a plate on the right side of his body.[3]
Eight years after the Final War, Ken has gained wrinkles under his eyes and his hair has grown longer, which he continues to tie in a ponytail. His updated hero costume is now a short sleeve orange suit with a brown undershirt, shorts, yellow straps around his shoulders, a yellow belt, and the collar now has two yellow square buttons.
Personality#
Cementoss is an often serious yet pleasant individual. He is very careful of the well-being of others. He did not allow Eijiro Kirishima to compromise All Might's identity[4] and also wanted to stop the match between Izuku Midoriya and Shoto Todoroki, noting that Izuku's injuries were serious enough to stop the bout.[5]
In battle, Cementoss has proven to be quite brave and valiant, as seen when he fought against Geten during the Paranormal Liberation War, saying that Pro Heroes will give their lives while on the job.[6] Also, when the PLF lieutenant insulted him as a "dog of society", Cementoss said that he'll gladly be a dog if it means protecting the people of Japan.[7]
Abilities#
Modern Literature Expertise: Ken teaches high school modern literature. This suggests that he is well versed in the subject.
Quirk#
Cement: Ken's Quirk allows him to manipulate any cement-based material that he touches, allowing him to deform the object into various shapes and sizes, changing its appearance. His Quirk doesn't appear to have a time limit, and Recovery Girl mentioned his Quirk is among the most difficult of the U.A. teachers to fight against.[8]
Ken is shown to have a superior handle over his Quirk, what with him being a Pro Hero and U.A. teacher. He continuously is seen creating multiple, towering vertical slabs by touching the concrete ground with his hands. The slabs are seen to be able to withstand a considerate amount of damage, shown when Rikido Sato and Eijiro had a hard time overcoming his ongoing walls during the exam.
Stats#
Equipment#
High Density Weights (Final Exams Arc): Cementoss and the rest of the teachers use these bracelets to give themselves a handicap while they are fighting their students.
Battles & Events#
U.A. Sports Festival Arc U.A. Sports Festival Final Exams Arc First Term Final Exam Team Sato & Kirishima vs. Cementoss Provisional Hero License Exam Arc Ultimate Move Training My Hero Academia: World Heroes' Mission Mission: Humarise Pro Heroes vs. Humarise Paranormal Liberation War Arc Paranormal Liberation War Gunga Mountain Villa Raid Villa Raid Team vs. Paranormal Liberation Front
Relationships#
Toshinori Yagi#
Cementoss considers himself a big fan of All Might, despite the fact that he is also a Pro Hero. Like the rest of the professors at the U.A. He knows his secret identity, and he does his best to prevent others from discovering it. He also knows about All Might's stomach wound and how this limits his ability to use his Quirk, so Cementoss cares about his health and advises him not to overdo it when he performs his duties as a hero.[4]
Chapter Appearances#
debut
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m
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m
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flash
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Anime Appearances#
debut
yes
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m
yes
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p
yes
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f
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flash
m
yes
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flash
yes
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Trivia#
- Ken's surname contains the kanji for "stone" and "mountain", and his first name contains "stiff, firm, hard".
- "Cementoss" is possibly a combination of "cement" and "toss".
- According to Ken's Volume 4 profile:
- He's a big fan of All Might.
- He likes round things, in contrast to his squarish design.
- Ken is also a founding member of the Hunt for the Perfect Roundness Association.[9]
- His favorite food is manju.
- On his profile, Kohei Horikoshi commented that he should have given Ken's hair a crew cut.
- Ken's Japanese voice actor, Kenta Ōkuma, also voices Manual, Centipeder, Nirengeki Shoda, Dozaemon, and Itejiro Toteki.
- Ken shares his first name with Ken Takagi, otherwise known as Rock Lock; however, the kanji symbols for their names are different and therefore have different pronunciations.