Koichi Shido

Koichi Shido is the main antagonist of the series, High School of the Dead, he is a cruel manipulative teacher and leader of a cult.

Plot
Prior to the zumbie apocalypse, Koichi was a ruthless teacher who often bullied or motivated his students, as he allowed the attackers to school Hirano. And during the apocalypse, he and his students get on a bus where he would brainwash them because of some admiring Shido as in Kawamoto's case. He is archenemy of Rei Miyamoto. However when Yamada who was the least fanatic follower and when he disapproves of his methods and has no sex with the girls, and so with the students's votes Shido sends Yamada out of the bus where he begs Shido to send him back to the bus but the zombies appear and devour him alive killing him in the process. And when Shido and his students enter the mansion where Rei threatens him with death, the more he decides not to kill him, so he and his students are expelled from the mansion and their fate in the end is unknown.