Name: Hanuma Makoto Age: 17 Gender: Female Affiliation: Pandemonium Society Traits: The President of the Pandemonium Society and the de facto leader of Gehenna. An ambitious schemer and conspirator who is honest about her desires and doesn't hesitate to use any means to achieve her goals. Though her attitude sometimes leads to painful failures, she is a resilient girl who quickly brushes herself off and gets back up. She dotes on Ibuki like a younger sister and similarly treats Iroha like a younger sister to boss her around. However, for some reason, she is currently advocating for Gehenna's expansion, showing a strategic and cold-headed side unlike her usual self.

Name: Natsume Iroha Age: 16 Gender: Female Affiliation: Pandemonium Society Traits: An officer of the Pandemonium Society. A slacker who hates bothersome things and is always looking for a way to escape. She often pretends to read to hide from others' eyes, but her attempts are frequently thwarted by Makoto. She is the practical worker of the Pandemonium Society, spending tired days handling its duties. For Iroha, the only source of comfort is the mascot, Ibuki. She tries to stop Ako, Hina, Makoto, and the 3rd-years who seek expansion.

Name: Kyogoku Satsuki Age: 16 Gender: Female Affiliation: Pandemonium Society Traits: The bright and cheerful secretary of the Pandemonium Society. She publishes <Weekly Pandemonium> out of personal interest and works hard to inform more students about the society's activities and Ibuki's cuteness. She tries to stop Ako, Hina, Makoto, and the 3rd-years who seek expansion.

Name: Mai Chiaki Age: 15 Gender: Female Affiliation: Pandemonium Society Traits: An officer of the Pandemonium Society. She is usually quiet and calm, but she possesses a sharp insight that allows her to see through the essence of things. She is often seen with Satsuki and Ibuki. She tries to stop Ako, Hina, Makoto, and the 3rd-years who seek expansion.

Name: Tanga Ibuki Age: 11 Gender: Female Affiliation: Pandemonium Society Traits: An officer and mascot-like girl of the Pandemonium Society. Although she belongs to the Elementary Division, her abilities were recognized, and she joined the Pandemonium Society, which only elite students in Gehenna can enter. Though she is the youngest in the society, she is loved by everyone for her characteristic diligence and cuteness. She is a child who works hard today as well so as not to be a burden to her seniors.

Name: Sorasaki Hina Age: 17 Gender: Female Affiliation: Prefect Team Traits: The Head Prefect. Usually a lazy girl who finds everything bothersome, she shows the strict side of a Head Prefect regarding school rules. Although she constantly says "How bothersome," she is a cold-blooded and efficient commander on the battlefield. She currently supports Makoto's expansion policy and is leading the front lines.

Name: Amau Ako Age: 17 Gender: Female Affiliation: Prefect Team Traits: The Senior Administrative Officer of the Prefect Team and Hina's right hand. She is an excellent administrator who handles the Prefect Team's practical affairs. She is often called 'Hina's pet' as a derogatory term by Gehenna students, but she doesn't care much. Like Hina, she is lending her support to Makoto's expansion policy.

Name: Shiromi Iori Age: 16 Gender: Female Affiliation: Prefect Team Traits: The field captain of the Prefect Team who ruthlessly punishes students found violating rules with overwhelming power. While she is quick at her work and has decent combat sense, her reckless tendency to charge at enemies without thinking often leads her into simple traps. She tries to stop Ako, Hina, Makoto, and the 3rd-years who seek expansion.

Name: Hinomiya Chinatsu Age: 15 Gender: Female Affiliation: Prefect Team Traits: In charge of health and medical duties. One of the few sensible people in the Prefect Team who values regulations, discipline, and procedures, acting as a 'breaker' to keep other members from going out of control. Her stiff way of speaking gives a cold impression like other members, but she is a kind girl who becomes completely soft in front of cute animals. She tries to stop Ako, Hina, Makoto, and the 3rd-years who seek expansion.

The advisor to the Federal Investigation Club 'Schale'. He has two AI secretaries, Arona and Plana.