This article is about the U.A. High teacher. For the Pro Hero known as Rock Lock, see Ken Takagi.
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.
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  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.
Modern Literature Expertise: Ken teaches high school modern literature. This suggests that he is well versed in the subject.
Cement (セメント Semento?): 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.
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 Kirishima had a hard time overcoming his ongoing walls during the exam.
Battles & Events
|Battles & Events|
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.
- Ken's surname contains the kanji for "stone" (石 ishi?) and "mountain" (山 yama?), and his first name contains "stiff, firm, hard" (堅 ken?).
- "Cementoss" is possibly a combination of "cement" and "toss".
- According to Volume 4:
- He's a big fan of All Might.
- He likes round things (whilst being, ironically, blocky).
- His favorite food is manju.
- On his profile in Volume 4, the author commented that he should have given Ken's hair a crew cut.
- Cementoss shares his first name with Ken Takagi, the "Pro Hero: Rock Lock".
- He shares the same Japanese voice actor with Masaki Mizushima, otherwise known as "Normal Hero: Manual".
- (To Eijiro Kirishima and Rikido Sato) "Listen. When it comes to fighting... It's all about making use of your particular strengths."
|U.A. High School|
|Class 1-A Students||Denki Kaminari • Eijiro Kirishima • Fumikage Tokoyami • Hanta Sero • Izuku Midoriya • Katsuki Bakugo • Koji Koda • Kyoka Jiro • Mashirao Ojiro • Mezo Shoji • Mina Ashido • Minoru Mineta • Momo Yaoyorozu • Ochaco Uraraka • Rikido Sato • Shoto Todoroki • Tenya Ida • Toru Hagakure • Tsuyu Asui • Yuga Aoyama|
|Class 1-B Students||Hiryu Rin • Ibara Shiozaki • Itsuka Kendo • Juzo Honenuki • Jurota Shishida • Kinoko Komori • Kojiro Bondo • Kosei Tsuburaba • Manga Fukidashi • Neito Monoma • Nirengeki Shoda • Pony Tsunotori • Reiko Yanagi • Sen Kaibara • Setsuna Tokage • Shihai Kuroiro • Tetsutetsu Tetsutetsu • Togaru Kamakiri • Yosetsu Awase • Yui Kodai|
|Department of Support||Mei Hatsume • Bibimi Kenranzaki|
|General Department||Hitoshi Shinso • Chikuchi Togeike • Tsutsutaka Agoyamato|
|Second Year Students||Mawata Fuwa|
|Third Year Students||Mirio Togata • Nejire Hado • Tamaki Amajiki • Bibimi Kenranzaki • Yuyu Haya|
|Staff||All Might • Cementoss • Ectoplasm • Eraser Head • Hound Dog • Lunch Rush • Midnight • Nezu • Power Loader • Present Mic • Recovery Girl • Snipe • Thirteen • Vlad King • Gran Torino (Retired)|
|Former Students||All Might • Endeavor • Best Jeanist • Midnight • Eraser Head • Loud Cloud • Present Mic • Mister Blaster|
|Locations||Class 1-A • Class 1-B • Conference Room • Ground Beta • Ground Gamma • Ground Omega • Gym Gamma • Heights Alliance • Lunch Rush Cafeteria • P.E. Grounds • Recovery Girl's Nurse's Office • Sports Festival Stadium • Teachers Lounge • U.A.'s Development Studio • Unforeseen Simulation Joint|
|Heroes||Air Jet • All Might • Backdraft • Best Jeanist • Cementoss • Centipeder • Crimson Riot • Crust • Death Arms • Ectoplasm • Edgeshot • Endeavor • Eraser Head • Fat Gum • Fourth Kind • Gang Orca • Gran Torino • Gunhead • Hawks • Hikage Shinomori • Hound Dog • Ingenium • Kamui Woods • Kesagiri Man • Lariat • Lunch Rush • Majestic • Mandalay • Manual • Midnight • Mirko • Mr. Brave • Mr. Principal • Ms. Joke • Mt. Lady • Nana Shimura • Native • Pixie-Bob • Power Loader • Present Mic • Ragdoll • Recovery Girl • Rock Lock • Ryukyu • Shishido • Sir Nighteye • Slidin' Go • Slugger • Snatch • Snipe • Takeshita • The Fly • Tiger • Thirteen • Uwabami • Vlad King • Wash • X-Less • Yoroi Musha|
|Vigilantes Original Heroes||Captain Celebrity • Compass Kid • His Purple Highness • Mister Blaster • O'Clock • O'Clock II|
|Movie and Anime Original Heroes||Amplifier • Cow Lady • Electoplant • Godzillo • Mr. Plastic • Nyikang • Pankration • Selkie • Takahiro • X|
|Sidekicks||Bigshot • Bubble Girl • Burnin • Enigma • Flaming Sidekickers • Gang Orca's Sidekicks • Kido • Mick • Midnight Boys • Onemu Shinya • Onima • Sirius|
|Hero Teams||Buster Union • Oki Mariner Crew • Team Idaten • Team Purple Revolution • The Lurkers • Water Hose • Wild, Wild Pussycats|
|Raid Teams||Hideout Raid Team • Hospital Raid Team • Villa Raid Team|
|Related Articles||Costume • Hero Name • Hero Office • Quirk • Sidekicks • U.A. High School|