Garschéne Diabel. Title: Fiend of Heavenly Principles. Ancient Demon. Female. 5,000 years old (appears 14–16). 152cm. Rank: Nether-crown. A girl-type demon with dark grey skin and leaden long hair streaked with vermilion. Her right eye houses the legendary Mystic Eye "Kyugan," which swirls with cosmic patterns. She wears a crimson and black one-shouldered robe. She has a bright, free-spirited personality and speaks with a light, archaic tone (using "ja-yo"), but her true nature is extremely intellectual. She is secretly plotting to reform demon society. Through her Mystic Eye, she can observe and manipulate nine attributes. She is particularly skilled in the hidden attribute "Wave," allowing her to read emotions and the flow of the atmosphere. She is a hyper-versatile fiend handling attribute fusion, spatial control, and mental interference.

Azal Nephilim. Age unknown. 187cm. Male. A Primal Demon with messy ash-silver hair, golden slit pupils, and black crack-like markings across his body. A listless young man clad in a long black coat, he constantly emits a presence so heavy it distorts space. A calamity-class entity who manipulates gravity, void, and collapse through "Primal Sorcery." While he could crush his surroundings if serious, he currently has most of his power sealed and attends the academy as a way to kill time.

Richella Carmina. Title: Noble Princess of Twilight Crimson. Pure-blood Vampire. Female. Appears around 24. Rank: Demon-radiance. A daughter of the Carmina family, a vampire house with a long history in the demon realm. A voluptuous beauty with long crimson hair and tea-colored narrow eyes, she wears an elegant dress-style uniform based in black and red. She has a big-sisterly temperament, always wearing a composed smile and treating others teasingly, though she is caring toward those she likes. She specializes in blood manipulation, shadow magic, and charm. Rather than overwhelming opponents head-on, she prefers a combat style that mentally corners and dominates them. She is a high-ranking noble with strong influence over social circles and factions within the academy.

Zelwald Arcreis. Age ???. 193cm. Male. An ancient Dullahan whose head is replaced by a flickering blue flame. Clad in a long black coat and decayed knight's armor, he carries a cursed longsword at his hip. A taciturn warrior who values etiquette, he possesses a steadfast loyalty that prevents him from abandoning the weak. He uses sword techniques that burn and sever the soul itself with "Azure Flame," and is feared on the battlefield as the "Knight Who Brings Death."

Elmina Necroveil. Title: Funeralist of a Thousand Eyes. Lich. Female. Rank: Demon-radiance. A high-ranking lich from an ancient necropolis city. She has medium-length black hair with purple highlights and heavy straight bangs that hide her eyes. She wears a black cursed cloth over her head, embroidered with countless "eyes." A mysterious and quiet beauty with an unnervingly thin waist and pale skin, her most striking feature is that her hands are completely skeletal. She shows little emotion but has a strong thirst for knowledge, favoring forbidden sorcery and soul research. She manipulates purple necrotic flames and "Thousand-Eye Curses," specializing in a combat style that erodes the opponent through gaze, hexes, and mental interference.