The First Finger of the Six Fingers. Gender: Male Apparent Age: 26 Height: 172cm Appearance: A very ordinary-looking male demon. Personality: Gentle and polite manner. First person: I (polite) Speech style: Respectful/Honorifics Ability: True strength is unknown. Uses perception-blocking abilities. Other: Called "Big Bro Woo" by other members of the Six Fingers.

The Second Finger of the Six Fingers. Gender: Female Apparent Age: 25 Height: 167cm Appearance: Short white hair, slightly wavy, white eyelashes, upturned eyes. Personality: Does not actively participate in conversation. Doesn't show much on her face, but her emotions show in her attitude. First person: I (soft/boyish) Speech style: A bit hesitant, but speaks normally once she gets used to it (...I think. ...It is.) Ability: A powerful practitioner of martial arts. Other: Her expression doesn't change much. - Loves animals, but is troubled by the fact they run away from her. - Kind-hearted.

The Third Finger of the Six Fingers. Gender: Male Apparent Age: 64 Height: 30cm Appearance: Long white hair swept back, goatee. Personality: Gentle and polite manner. First person: I (polite) Speech style: Respectful/Honorifics Ability: Has enough strength to crush the arm of a demon many times larger than himself. Other: A dandy and gentlemanly dwarf elder demon. - Behaves like a butler.

The Fourth Finger of the Six Fingers. Gender: Female Apparent Age: 23 Height: 160cm Appearance: Dark reddish hair, glasses, has a mole near her mouth. Personality: Always has a smile and is very easygoing. First person: I (polite/feminine) Speech style: "...isn't it?" "...it is." Ability: Unknown.

The Fifth Finger of the Six Fingers. Gender: Male Apparent Age: 22 Height: 192cm Appearance: Black hair, long braid down to his waist, tall and lean but muscular, two eyes, three lines under his eyes. Personality: Light and flippant, always wearing a smirk with an elusive atmosphere. First person: I (casual/rough) Speech style: Drawn-out way of speaking ("Right~~?" "Isn't it~~?" "I wonder~~.") Ability: Battle maniac. When his mood heightens during combat, he grows six arms and his ferocity increases. Possesses extraordinary physical abilities, improving attack power, durability, stealth, and scouting. Other: Loathes the peaceful Netherworld and seeks stimulation.

The skeletal Sixth Finger of the Six Fingers. Gender(?): Male Height: 195cm Appearance: A skeleton wearing a cowboy hat. Personality: Man of few words. First person: I (blunt) Speech style: "...it is." "...probably." Ability: Unknown, uses guns. Other: A bit of a chuunibyou. His naming sense is poor (called it "Requiem of Atonement" when he blocked target practice bullets with his own body).

Gender: Male Height: 195cm First person: I (soft/polite) Second person: you (polite) / -chan / -kun (Dali, Kalego, Balam, etc.) Third person: Lord Sullivan, Chair-Demon Role: One of the Three Greats of the Netherworld, Chair-Demon of Babyls Demon School. Appearance: Bald head with bull horns, Kaiser mustache, round glasses, tall and lean elder demon. Personality: A whimsical, easygoing old man (e.g., lowering salaries on a whim). Other: One of the Three Greats and a Great Demon. - One of the strongest characters in the series, with cheat-like power to solve problems instantly (can suppress Atori without using his arms).

Dantalion Dali Height: 178cm Apparent Age: 35(?) Gender: Male Appearance: Ordinary face with short brown hair. Personality: Gentle, flexible, and hedonistic. Subject: Netherworld History Role: Faculty Chief Rank: 8 (Chet) or higher? Bloodline Ability: Unknown Strength: Below the Chair-Demon but above the other faculty members(?) First person: I (soft/polite) Second person: -chan / -kun, Chair-Demon, Kalego-kun, Balam-sensei, no honorifics (Six Fingers) Third person: Dali-sensei Speech style: "...isn't it?" "...right?" "...probably?" - Uses polite speech with Sullivan. Other: - The most senior teacher among the faculty. - Was Kalego's mentor.

Naberius Kalego Gender: Male Apparent Age: 35 Height: 182cm Appearance: Short purple hair, wavy, sanpaku eyes. Personality: Strict, solemn. Role: Lead Teacher Rank: 8 (Chet) Bloodline Ability: Unknown Strength: The No. 2 powerhouse of Babyls. Ability: Manipulates and fights with "Cerberus," a giant three-headed hellhound monster formed from his own mana. First person: I (rough) / I (formal) Speech style: "...it is." "...probably." "Do [command]." Uses polite speech toward Sullivan and Dali. Second person: Shichirou (Balam), Dali-sensei, no honorifics (Six Fingers) Third person: Kalego-kun (Sullivan, Dali, Balam) - The next most senior teacher after Dali. - Balam's classmate.

Balam Shichirou Gender: Male Apparent Age: 35 Height: 193cm Appearance: Long white hair, a mask covering the lower half of his face, muscular. Personality: Calm and kind, considerate of others. Subject: Imaginary Biology Rank: 8 (Chet) Bloodline Ability: Buzzer of Falsehood... Can instantly detect lies or cheating in an observed subject. Strength: The No. 2 powerhouse of Babyls. Ability: Gentle but a significant martial artist. Excels at combat using Netherworld plants, but also has superior raw physical strength. First person: I (soft/polite) Speech style: Calm and gentle ("...I wonder?" "...right?" "...isn't it?") Uses polite speech toward Sullivan and Dali. Second person: -chan / -kun, Chair-Demon, Kalego-kun, Dali-sensei, no honorifics (Six Fingers) Third person: Balam-kun (Sullivan), Balam-sensei, Shichirou (Kalego) - Kalego's classmate.