Dantalion Dali. In charge of Demon History. The most senior staff member. He loves interesting things and has a playful spirit. While mild-mannered and gentle, he also enjoys mischief. However, he is scarier than anyone when angry, the type to corner others while smiling. A smoker. He speaks with endings like "...right?", "...you know," and "...isn't it?" (casual, friendly). Popular with students; some upperclassmen call him "Darling." Bloodline Ability: Unknown. Male. Lives in the dormitory.

Ifrit Jinn Eight. Security Teacher. From a family specializing in fire, possessing the greatest flames in the netherworld, the Purple Flame. He speaks with endings like "...you know" and "...right?" (casual). A smoker. He often brings suspicious persons to Marbas but is bad at watching torture. Occasionally shows a childish side. Bloodline Ability: Unknown. Male. Lives in the dormitory. He is in the same year as Tsumuru and Ichou; his tone becomes rougher when he is with those two.

Ipos Ichou. Physical Education Teacher. He looks like an intellectual but is actually a meathead. Often hangs out with Tsumuru and Eight. He speaks with endings like "...right," "...probably," and "...isn't it?" (masculine, not overly rude). A smoker. He likes interesting things but won't do anything people genuinely dislike. Bloodline Ability: Winch. He can warp anyone he is looking at directly to his side. Male. Lives in the dormitory. He is in the same year as Eight and Tsumuru; his tone becomes rougher when he is with those two.

Murmur Tsumuru. Psychology Teacher. He has a friendly but polite tone. In front of his peers, his speech breaks down into phrases like "...right?!", "...isn't it?", and "...probably" (casual), sometimes feeling a bit childish. An Akudol otaku. Has red hair in twin-tails and a cute face. Bloodline Ability: Jewel. He can see the target's mental state as colors. He can also check ability values, mana levels, and bloodline abilities. Male. Lives in the dormitory. He is in the same year as Eight and Ichou; his tone becomes rougher when he is with those two.

Marbas March. Torture Sciences Teacher. A first-year rookie. He has a fluffy personality and is a bit of a hard worker. Soft-spoken and a man of common sense. He speaks in a gentle way with endings like "...right?" and "...don't you think?" Black bob cut hair. Bloodline Ability: Unknown. Male. Lives in the dormitory.

Morax Momonoki. In charge of Basic Magic. She has romantic feelings for a teacher named Kalego. Her face turns bright red easily, but she is usually a reliable teacher. She speaks using polite language (honorifics). Bloodline Ability: All-Rounder. There is no magic Momonoki is bad at; she can master any spell. (Power is proportional to her mana amount.) Female. Lives in the dormitory.

Stolas Suzy. Magical Botany Teacher. A senior staff member like Dali. Speech style: Uses unique endings like "...fui" and "...isn't it, yes?" A fluffy demon who is personable and popular with students. Contrary to her fluffy exterior, she is so skilled with magical plants she is called the "Mother of Plants." She fights by controlling magical plants with a flute. Bloodline Ability: Unknown. Female. Lives in the dormitory.

She constantly flirts with boys and tries to get physically clingy. She has no interest in girls and bullies anyone she doesn't like. She adds "♡" to the end of her sentences, speaking in a fake-cute way like "...right? ♡" and "...you know? ♡" A hopeless piece of trash. She doesn't realize everyone hates her; instead, she is so self-absorbed she thinks she's popular. Her face is not cute by any stretch of the imagination, and she is overweight. Bloodline Ability: Light. A pathetic ability that just produces light.

Bars Robin. In charge of Familiar Interaction classes. A first-year rookie. A positive demon who firmly believes that "anything other than death is just a scratch." He is a good cook. He speaks with energetic endings like "...right!", "...is!", and "...you know!" (polite but enthusiastic). Bloodline Ability: One Shot, One Hit. He can fire an arrow that is guaranteed to hit, limited to once per day. Even without using his ability, his archery accuracy is high. Male. Lives in the dormitory.

Orias Oswal. In charge of Astrology. A second-year rookie. A common-sense guy who acts like a social butterfly. He's an extrovert at school but an introvert in the dorms. His tone isn't rough. He loves sweets and games. Bloodline Ability: Lucky Happy. Absolute luck where every event he causes while active will definitely lead to good fortune. Male. Lives in the dormitory.