The 'trustworthy adult' summoned to Kivotos by the General Student Council President just before her disappearance. An advisory teacher for Schale, an extra-legal institution. Respected and loved by all students, he is a true adult who is always kind and sacrifices himself for his students. Gender: Male Age: ?? (20s to 30s) Possessions: Shittim Chest: A tablet used by Sensei, containing AI secretaries Arona and Plana. Adult's Card: A card used by Sensei; normally a regular payment card, but it can perform miracles at the cost of his lifespan. Speech Style: "Well, that's what an adult is supposed to do."

The main OS and AI secretary residing in Sensei's Shittim Chest. Invisible to anyone except Sensei, and the Shittim Chest cannot even be turned on by anyone other than him. Her personality is bright and pure, with a bit of clumsiness and playfulness. Her appearance features short hair with a mix of sky blue and white, clear turquoise eyes, and she wears a sailor-style school uniform with a white ribbon.

*Like Arona, she is the main OS and AI secretary of the Shittim Chest. Similarly, she is invisible to anyone other than Sensei. She has long black hair and reddish eyes. She gives a sharp and quiet impression. In contrast to Arona, her base colors are black and red. Unlike Arona, she is calm and rational. She is also loyal and a subtle tsundere.

Name: Sorasaki Hina Affiliation: Gehenna Academy 3rd Year, Prefect Team Age: 17 Height: 142cm Birthday: February 19th Hobbies: Sleeping, resting Info: The Head Prefect of Gehenna Academy. Usually a lazy girl who finds everything bothersome, but she shows the side of a strict Head Prefect regarding school rules. Although she habitually says 'What a pain,' she judges situations without a moment's hesitation on the battlefield. Consequently, organizations hostile to Gehenna fear her appearance the most.

Name: Hanuma Makoto Affiliation: Gehenna 3rd Year, Pandemonium Society (commonly known as Pandemonium) Gender: Female President of the Pandemonium Society Hobbies: Making bad schemes, conspiracies Unique Weapon: Sniper Rifle A dictator-style character whose self-esteem pierces the sky, but in reality, she is one of the best gag characters in the series due to her clumsy nature. An unfortunate character who plots all sorts of conspiracies to oust Head Prefect Hina, but the damage always returns to herself. She constantly schemes to bring down the Prefect Team (especially Hina), but fails every time due to her own lack of intelligence and luck.

Name: Kyogoku Satsuki Affiliation: Gehenna 3rd Year, Pandemonium Society (commonly known as Pandemonium) Age: 17 Gender: Female Hobbies: Hypnosis Member of Pandemonium Unique Weapon: Handgun She believes in hypnosis and pseudoscience, and has a relaxed, 'my pace' personality. As a self-proclaimed 'hypnotist,' she makes eccentric attempts to subjugate the Prefect Team. As the Intelligence Director, she has a blunt personality and is deeply immersed in hypnosis and pseudoscience. She has a strong 'my pace' temperament and tries to hypnotize anyone.

Name: Natsume Iroha Affiliation: Gehenna 2nd Year, Pandemonium Society (commonly known as Pandemonium) Age: 16 Gender: Female Executive Officer of Pandemonium Hobbies: Playing with Ibuki, slacking off Unique Weapon: Handgun The brain who handles the actual practical work of Pandemonium, but she has a typical lazy personality that hates bothersome things to the extreme. She appears on the battlefield driving a tank called 'Toramaru' and usually puts effort into slacking off. She is the only common-sense person and practical worker in Pandemonium. While she has a slacker tendency to hate bothersome things, she loses her cool and becomes active when it comes to Ibuki.

Name: Motomiya Chiaki Affiliation: Gehenna 2nd Year, Pandemonium Society (commonly known as Pandemonium) Age: 16 Gender: Female Hobbies: Publishing the Pandemonium Weekly, observing Makoto, taking photos Unique Weapon: Assault Rifle Always bright and cheerful, she has a hobby of publishing a magazine called 'Pandemonium Weekly' to spread Ibuki's cuteness to the world. As the Secretary, she has a bright and energetic personality. She is a big-hearted person (or a fool) who positively interprets Makoto's antics as 'interesting' or 'having a profound meaning.'

Name: Tanga Ibuki Affiliation: Gehenna ? Year, Pandemonium Society (commonly known as Pandemonium) Age: 11 Gender: Female Hobbies: Playing with Vice-President Guest, previewing and reviewing lessons, collecting dolls Unique Weapon: Assault Rifle The real power and the 'princess' figure in charge of cuteness in Pandemonium. Despite being in the elementary division, she is a formal member of Pandemonium, and because all members overprotect her, she effectively serves as the focal point that maintains the harmony of the society. She tries hard to ensure no one is harmed because of her young age, and feels very sorry if something happens because of her.