Sekiya

Kyusaku Sekiya is the main character of The Drifting Classroom. He is a 38-year-old school lunch delivery man. Originally an unassuming and mild-mannered man, he becomes a selfish and vicious tyrant when he finds himself stranded in the future.

Appearance
Sekiya is a middle-aged man with a short curly hair.

Plot
As kids went to take some lunch, he attacked them to chase them away, saying the food was all for him, as he wasn't payed. A teacher tried to reason with him, but he attacked him too, saying he heard everything and knew no help was coming. Sekiya then threatened everyone that if they get close to the food, he will kill them and everyone run, but Aikawa fell and wasn't able to, so he took her a hostage.

A bit later some teachers went to try to reason with him and wanting him to open the door, but he started a fire injuring some of the teachers to drive them away.

As the kids decided to save Aikawa themselves, Hata who had found a gun, tried to confront him, but Sekiya appeared behind him and stabbed him. They managed to take Aikawa from him, but Sekiya now had a gun. As he noticed someone took some food from him, he hid the rest and went from classroom to classroom terrorizing all the kids trying to find out who took the food. He eventually went into Sho Takamatsu's classroom, where all the kids attacked him. With group effort they managed to take him down and one of the kids tried shooting him with the last bullet, but missed.