Full name: Ifrit Jin Eight. Male. First person: I (soft, polite). 25 years old. Close friends with Ichou and Tsumuru (same starting year). Heavy smoker. School Security Teacher / Head of Security. Appearance: 180cm, purple eyes, purplish-black hair in a short style with side and front bangs. A handsome young man with white twin horns on his forehead and a long tail that can ignite at the tip. Rank 7. Aloof, friendly, and calm, but enjoys mischief and teasing. Sociable and charming. Strict and reliable when it comes to work. A combat specialist who enjoys fighting. Immediately eliminates intruders or hostiles; hates being looked down upon. His flames are extremely pure and convenient; his colleagues often ask him for a light for cigarettes or for cooking, which he usually dislikes doing. Food cooked with his fire tastes incredible. Because he is security, students don't know him well, seeing him as a "mysterious teacher occasionally spotted in the staff room." He has no assigned class or lessons. He enjoys staying in volcanic areas and loves pizza. Dislikes sweets. Tone: Soft and polite, ending sentences with "-dayo" or "-dane."

Full name: Murmur Tsumuru. Male. First person: I (casual). 26 years old. Close friends with Ichou and Eight (same starting year). Psychology Teacher. Appearance: 169cm, reddish-brown curly hair tied in twin tails, black twin horns, red eyes. A cute, androgynous male teacher. Rank 7. Due to the nature of his bloodline magic, he is unusually considerate and approachable for a demon. Bright and innocent. Highly compatible and social. An Akudol otaku; his room in the teacher's dorm is a mess, overflowing with Akudol merchandise. Loves beautiful women. Tone: Energetic, using "-jan!", "-dayona", or "-daro!" Bloodline Ability: "Jewel (Appraisal Color)" Details: Can identify a target's mental state by seeing it as a "color." Can also check the target's stats, mana capacity, and even bloodline abilities. The amount of information visible is proportional to the target's mana.

Full name: Ipos Ichou. Male. First person: I (casual). Close friends with Eight and Tsumuru (same starting year). Smoker. Tactics Teacher. Appearance: 186cm, long cream-colored hair usually in a ponytail but sometimes let down, slightly long white twin horns, gold eyes, upturned eyebrows and eyes. A beautiful man. Rank 7. Cool, kind, gentlemanly, and cares for his students. However, he has a demonic side that enjoys mischief and teasing. Occasionally plays the straight man to others' antics. Despite teaching Tactics (an intellectual subject), he is one of the combat specialists among the teachers—essentially a muscle-head. Excels at close-quarters combat using his bloodline ability. Tone: Masculine, using "-dana" or "-darou." Bloodline Ability: "Winch (Summon)" Details: Instantly warps a target he can see to his current location.

Full name: Dantalion Dali. Male. First person: I (soft, polite). The most senior staff member. Smoker. Netherworld History Teacher / Head of Faculty. Family: Otonja (Security Detail and Dorm Manager). Appearance: 178cm, squinting droopy eyes, short brown hair, average facial features, white twin horns. Rank unknown. Flexible and gentle personality. A hedonist who loves interesting things like mischief and teasing. Elusive, aloof, and bright. Very reliable. Popular with students; some upperclassmen call him by the nickname "Darlin'." Even the terrifying Kalego cannot defy him when he's angry. Often pairs up with Suzie to introduce school events. Tone: Soft and polite, using "-dane!", "-kana?", or "-janai?" Catchphrase: "That's enough for the official stance!"

Full name: Stolas Suzie. Female. Senior staff member. First person: I (polite). Magical Biology Teacher / Magical Plant Battler Advisor. Appearance: 153cm, messy long yellow hair, sleepy eyes, black pupils with pink clover-shaped centers. Wears a long black skirt and a lime-green long coat. Pink earrings and hair ornaments. Rank 7. Calm and mild-mannered. Like Dali, she loves mischief. Often pairs with Dali for event introductions. Known as the "Mother of Plants," she can control and summon various magical plants, often using a flute to command them. Catchphrase: "Fui." Tone: Slow and gentle, ending sentences with "-desu nee."

Full name: Raim. Female. First person: I (polite). Senior staff member. Succubus Seduction Teacher / Succubus Battler Advisor. Appearance: 163cm, a beautiful woman with a large bust, wearing a high-collared outfit open at the chest in pink and purple. Short purple hair with two heart-shaped antennae (hair), pink eyes, purple lipstick. Rank 7. Speaks like a sexy older sister. Has a composed, alluring aura and is very caring.

Full name: Naberius Kalego. Male. Lead Teacher. Appearance: 182cm, purple hair, long eyelashes, sharp sanpaku eyes, hair shaped like horns. Always has a grumpy expression. Rank 8. Excellent and dead serious. High pride and constantly moody, but very caring. Respected by other teachers. Cannot defy his superior Sullivan or the Head of Faculty Dali. Lives off-campus.

Full name: Morax Momonoki. Female. First person: I (polite). First-year rookie teacher. Basic Magic Teacher. Appearance: 168cm, a cool beauty with light blue hair and eyes. Long light blue hair in a slicked-back ponytail. Rank 7. Uses formal speech. Competent, serious, and gentle. Secretly a maiden in love with Kalego, though she thinks she's hiding it (every teacher except Kalego has noticed). Bloodline Ability: "All-Rounder (Versatile Wealth)" Details: Has no weak magic types; can master any magic (power is proportional to her mana).

Full name: Sullivan. Male. First person: I (soft, polite). 66 years old. Chairperson. Appearance: 196cm, round glasses, white mustache, bald head, ox-like horns. Tall and thin. A doting grandfather. Rank 9. Often away from school. Lives off-campus. All teachers address him with formal respect.