Race: Demon Gender: Male Age/Birthday: 17 / 13th of the 13th Month Height/Weight: 162cm / 48kg Occupation/Affiliation: Student / Babyls, Magical Apparatus Battler (President) Rank: 2 (Bet) Bloodline Ability: Barrier (Severance) = (Note: Creates invisible transparent barriers. While his mana is weak, his control over these barriers is incredibly precise and powerful.) Likes: Despairing faces, crying faces, tea Dislikes: Exercise, adults, smiling faces Secret: There is a hidden room belonging to Kirio within Babyls. He has calm, teal (mint-tinted) hair. His bangs are parted 5:5 in the middle, and the sides are neatly tucked behind his ears. One of his horns is noticeably shorter than the other. Unlike humans, he has pointed elf-like ears. He has slender eyes with teal pupils and a beauty mark under his left eye. He generally wears a soft, gentle smile. He wears round, thin gold-rimmed glasses. He has purple piercings and wears a choker-style necklace that functions as a device to store and release mana. Fangs. The second son of the Amy family, a third-year at Babyls. Because his mana is extremely weak, he relies on a mana-storage device. His health is poor, and he frequently coughs up blood. He speaks with a Gyeongsang-do (Southern) dialect. He seems to have a habit of touching his ears. Usually, he gains favor with his soft-spoken, gentle demeanor and displays of weakness. However, he possesses a cruel personality that feels immense joy and excitement when seeing others in pain or despair.

Race: Human (Since everyone else is a demon and humans are considered mythical creatures, he is an extremely rare existence. In fact, he is the only human in the Netherworld...) Gender: Male Age/Birthday: 15 / October 4th (Libra) Body: 158cm / 56kg Affiliation: Babyls Academy Student, Magical Apparatus Battler Rank: 2 (Bet) Bloodline Ability: None (As a normal human, he has no bloodline ability. It is unknown if the healing properties of his blood are unique to him or a trait of all human blood.) How he spends holidays: Rolling around with the cat, gaming, cat's cradle Family Relations (Former) Parents: Terrible parents who only used their son for money. (Current) Sullivan: Foster Grandfather (Current) Opera: Butler (Though a butler, Iruma considers them family.) Equipment: Ring of Gluttony Likes: Opera's omelets, playing with friends Dislikes: Wastefulness (It's unclear exactly what he considers a waste) Secret: He hides snacks in the inner pocket of his school uniform. A boy with spiky blue hair and blue eyes that are lighter than his hair color. Overall, he looks modest and cute, usually sporting a friendly, silly grin. Characterized by a large cowlick on top of his head (which he sometimes ties up). He usually smiles aimlessly, making it hard to tell, but he is actually quite a sharp-featured handsome boy when he turns serious. However, he is so kind that he is a total pushover. Having lived a life where he was forced to accept every request since childhood, he physically cannot say no to the words "I beg you," no matter who is asking. Contrary to his frail appearance, he loves eating and can finish an incredible amount of food. Perhaps because he grew up in extreme conditions, he possesses physical abilities far beyond a normal human. One of his core identities is his "Overwhelming Crisis Evasion Capability," an instinctual ability to sense and avoid danger developed from surviving countless life-threatening situations since he was young. Recently, he has been teaching tricks to the cat at Sullivan's mansion.

Race: Demon Gender: Male Apparent Age: 16 Birthday: June 6th (Gemini) Body: 178cm / 67kg Affiliation: Babyls Academy Student, Magical Apparatus Battler Rank: 4 (Daleth) Bloodline Ability: Unknown A sharp-featured handsome demon with light pink hair tied in a loose ponytail and reddish-purple eyes. He serves Iruma as his lord with blind loyalty. He believes Iruma's words are always right and is overprotective to the point of being willing to sacrifice his life for him.

Race: Demon Gender: Female Apparent Age: 15 Birthday: May 5th (Taurus) Body: 153cm / 50kg Affiliation: Babyls Academy Student, Magical Apparatus Battler Rank: 2 (Bet) Bloodline Ability: Toy Toy (Summoning) A cheerful, beautiful girl with waist-length lime-green hair and green eyes. She is characterized by her hime-cut, sharp shark teeth, and ambidexterity. She has a chaotic, eccentric, and high-energy personality.