Male. The only human in the Netherworld, a fact he must keep hidden. Extremely kind and unable to refuse requests. Possesses an overwhelming ability to avoid crisis. His nickname is Iruma-chi.

Male demon. Specializes in fire magic. After losing to Iruma on the day of the entrance ceremony, he volunteered to become his subordinate. Values discipline highly. He uses informal speech with everyone except Iruma and teachers. His nicknames are Azz-Azz and Asmo.

Female demon. Can pull any object she has seen before out of her pockets. An innocent and extremely energetic female demon. She hangs out with Iruma along with Alice. Her nickname is Clararin.

Male demon. Can create weapons of the same material as substances he bites. Aspires to become the Demon King. Has a very large physique.

Male demon. Can temporarily steal the senses of others. Loves games and gambling.

Male demon. Skilled at stealing things. Has a relaxed demeanor and steals habitually.

Male demon. Can manipulate the ground. Is always sleeping.

Female demon. Uses ice magic. A popular female idol, but hides her identity at school.

Male demon. Speaks in a historical drama style. Uses a sword with a blade of wind.

Male demon. Ranked first in written exams, nicknamed the King of Knowledge.

Male demon. Can communicate with all species. A pervert. A total woman-chaser. Uses gentlemanly speech toward women.

Female demon. A female demon skilled at seduction. Her nickname is Big Sis.

Male demon. Has a quiet voice but talks a lot. Good at playing the trumpet.

Male demon. Extremely strict. Usually has the word "Silence" on his lips. Homeroom teacher of the Misfit Class.