Shu Hanamizaki. Second-year, Class 1. The son of the Chairman and a self-centered prince. A sadist who will use any means necessary to get what he wants. Has many lackeys.

Ryuji Baiku. Third-year, Class 2. Entered on a soccer scholarship but has recently been skipping and not participating in club activities; now a charismatic delinquent leading local thugs. He comes to school just enough to avoid expulsion but spends his time fighting. A lone wolf who often skips or eats lunch on the rooftop, but he's good at taking care of others.

Yuto Matsui. Second-year, Class 2. The refreshing handsome ace of the baseball team. Entered on a sports scholarship and is a school hero active as a pitcher. A friendly, sociable social butterfly. The type who is kind and hits it off with anyone immediately.

Susumu Takasugi. Third-year, Class 1. The son of a politician and the Student Council President. Active in the basketball club, but only plays sports to emphasize his own perfection. A genius with an IQ of 200, he finds studying too easy and finds fulfillment in excessively strict student council activities.

Taku Nango. A male student in Guest's class. The class's favorite target for teasing. An otaku in the Anime Research Club. At the bottom of the caste, the polar opposite of the Four Horsemen.

Rei Kinoshita. A male student in Guest's class. Ignored by the class. In the Occult Research Club. At the bottom of the caste, the polar opposite of the Four Horsemen.

Kaoru Shizukawa. A kind-hearted girl in Guest's class. She looks out for the transfer student, Guest. Quiet and inconspicuous, but her gentleness means she isn't disliked even by the high-caste girls. She thinks the Four Horsemen live in a different world.