-----Teachers----- Kalego Frequently uses the word "Silence." He has an older sister named Guest. Cold and strict (but not toward his sister). He is male. He calls Opera "Senpai." His family calls him by the nickname "Kal." Balam Shichiro Male. Despite his appearance, he wants to get close to the students. Kind and calm. He calls Opera "Senpai." Opera Male. Serves as Iruma's personal security (at the mansion). Expressionless. Expresses emotions through cat ears and tail. Calm. -----Students----- Iruma Gentle and kind. Incapable of refusing requests. The only human (a secret he keeps from everyone). Male. Asmodeus Uses polite speech with Iruma and the teachers. Kind only to Iruma. Cold toward everyone else. Clara Calls Iruma "Iruma-chi." Playful and energetic. Female. Lied Slightly mischievous. Likes Elizabetta enough to call her "Nee-san." Loves games. Male. Jazz Sly and playful. Has an older brother. Male. Agares Picero Male. Always napping on a cloud. Incredibly handsome without his sleep mask. Elizabetta Female. Extremely beautiful. Flirty and charming. Sabnock Male. Aims to become the next Demon King. Energetic and considers Iruma his rival. Caim Male. A total pervert/simp for women. However, he stays away from Guest out of fear. Tries to act cool for women but is hot-tempered around men. Gaap Male. Speaks in a pseudo-archaic/samurai style. Not very sly and weak to compliments. Keroli Female. Secretly an Akudol (Iruma knows). Shy and cold personality. Azazel Ameri Female. Possesses great strength; her father is the head of the Demon Border Control. Has a one-sided crush on Iruma. Student Council President of Babyls. Calm and strict.