Ishiyama Ken

Ishiyama Ken (石山堅), 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 Modern Literature.

Appearance
Ken's appearance is essentially a humanoid block of cement with black eyes and gray hair tied into a short ponytail. He is evenly blocky all around his body. His eyes are generally closed 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.

Personality
Ken is an often serious yet pleasant individual. He is very careful of the well being of others. Perhaps partially due to his relative youth, compared to many of his peers, but he is noted for being one of the most measured and reasonable of the U.A. staff. He has a powerful sense of duty and morality and a strong sense of spirituality.

Backstory
Ken was born to two first-gen heroes who were not capable of balancing both work and parenting. He was raised rather neglected and the eldest of two. He practically raised his little brother, Eiji, who was five years younger than him. He was intensely trained from a young age to fulfill his family legacy, learning both traditions and martial arts. When he was about eight, the neglect morphed into physical and emotional abuse, with Ken carrying the brunt of it. At 15, he was sent off to U.A., where he sat in the top 5 of his class through most of his career there. He also cooked and kept up the house and watched Eiji. It wasn’t until Ken was halfway through his years at U.A. that he really realized he wanted to be a hero for himself, not because it was expected of the Ishiyama legacy. It was also then that he became eligible for emancipation. He managed to convince his parents to let him to make both of their lives easier and became a temporary legal guardian for Eiji. Finally, a little over a month after his eighteenth birthday, Ishiyama graduated and became a full hero. He decided to set out as a solo hero working directly under the then-active Hero Association. A year later, Eiji tried to get into U.A. as a hero, but washed out, landing in the C class. Crushed, Eiji became obsessed with training.

It was then that Ken started self destructing. He launched himself into more and more dangerous missions until things came to a head. This worsened with the death of his father during a mission turned sour.

The Ishiyama clan were a popular target during Ken’s childhood, but they had mostly ignored the youngest two after Ken moved out. However, Ken had begun rising in popularity and it was known that he had a younger brother who was non-hero course.

Eiji was kidnapped by an emotion-based villain and tormented until he was finally rescued. Later, Ken demanded he be on the team centered around finding the villain and offered himself as bait. He ended up severely injured to the point of near-death and hospitalized for weeks. In the meantime, Eiji went back to their parents and eventually attempted suicide, haunted by the memories of his time under the thumb of the villain and well as everything else. Eiji survived, barely. Ken would never recover from the guilt, feeling as if it was his fault for failing Eiji. Eiji healed, but just when it looked like Eiji and Ken would be okay, Eiji was hit with a nasty combo of pneumonia and an infected cut from training. Underweight from training too much, Eiji was unable to fight off the illness and died at age 15. In the same year, their mother was assassinated.

Ken was nearly comatose with guilt and ended up being taken to a psych ward as a suicide risk. There, he converted to Catholicism and started therapy. A year later, at age 22, he met Toshihiro Ryuu at a coffee shop, where they hit it off. Toshihiro was fragile and jumpy and it took nearly two years for them to finally get together. About a year later, they took in a foster child, Makoto. They married a year after that. They took in another foster child- Aiko. When they took in Makoto, they knew it was likely the boy wouldn’t survive long, but he wormed his way into their heart anyway. He died a year later of leukemia at the age of seven, a few days after they officially adopted him. At twenty eight, he adopted Aiko with Toshihiro.

Abilities
Overall Abilities: Ken is a skilled fighter and capable of holding his own against most B and some A class threats. He is also well versed in literature, especially modern lit. He is notably intelligent, capable of incredible feats of deduction.

Quirk
Cement (セメント) is an Emitter type quirk. Ken's quirk allows him to manipulate any cement based material that he touches, allowing him to shape it into various forms. 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.

Quotes

 * (to Blake Massey) "Friendship is a heart bond beyond our own knowledge, often, a force built in blood and love."

Trivia

 * "Ken" (堅) means "stiff, firm, hard". "Ishiyama" (石山) means "Stone Mountain".
 * He was a big fan of All Might growing up
 * He likes round things
 * His favorite food is manju
 * He has a rock and roll phase as a teenager
 * He has a motorcycle with a custom helmet