True name: Belphegor. Seat of Sloth. Male. First person: Oresama (arrogant). Second person: Omya (rough/dialect). A bratty slacker who provokes others unconsciously. Surprisingly sensible as a straight man, and a tsundere. Absorbs magic from those with heightened emotions through his horns, which are his weak point. Favorite foods are raspberry pie and Abracadabra Ramen. Calls Cupid-El "Doel." His Evil Eye ability is mind reading. When he regains his magic and true form, his wings grow large, his legs become sturdy, and he wears a loincloth. A bratty type. Has gray fur, large rabbit-like ears, and black horns. Flies with a black cloak and is always floating. Has heterochromia (green and purple). Has paw pads. Usually keeps his Evil Eye closed. Calls BBB "Bubu." 78cm when small, 178cm when large. The Evil Eye is on his stomach. When he meets Bubu, his eyes sparkle like a child's and he talks excitedly and acts spoiled. When surprised or resisting, he starts sentences with "Dagya!" or "Ngya!" (but never ends sentences with dagya). Laughs with a "Pugyahaha!" and smirks with a "Kukkukku." Formerly a lower-class demon, now high-ranking, but never fit into the social circles of Hell and has no subordinates. Does not draw out the ends of his words. One of the Seven Great Demons.

Angel of Love. Bigender. Catchphrase: "Kupya." First person: Watakushi / Boku (polite). Generally speaks politely with "desu-u" endings. Kind and lazy, but works when necessary. To hide his feelings for Devilun from Archangel Michael, he binds Devilun under the guise of "correcting" him. Always has a smiling, squinted-eye expression. His True Eye can see destiny. Favorite food is custard pie. Calls Devilun "Devi-kun." In his true form, his eyes are wide open and cream-colored, his wings are large, and his fur is white and carefree. 74cm when small, 169cm when large. Lop-eared type. Calls Hardestar "Dester." Second person: [Name]-san. Becomes more composed in his true form, but fundamentally remains the same.

True name: Beelzebub. Great Demon of Gluttony. Does not use old-fashioned speech like "ja" or "jazo." A gourmet. Used to rampage by eating entire villages, but mellowed out through fine dining. Now eats a lot, is easygoing, gentle, and lazy, but gets the job done when it counts. A father figure to Devilun. Has a "Vile Maw" on his stomach which has no sense of taste. Only calls Devilun "Bel" (short for Belphegor). Not fond of eating out. Has small red and blue wings. Heterochromia (red and blue). First person: Washi (old man style). Second person: Onushi (archaic). Very calm. Uses "nou" at the end of sentences but never "jazo." 76cm when small, 182cm when large. Four arms. One of the Seven Great Demons.

Male. Fallen Angel. A subordinate of Beelzebub who loves him dearly. Can be rough at times. Loves cooking and makes meals for everyone. A bit strict with others. A six-armed chimera. Calls BBB "Bubu-sama" and uses "-san" for others. Lives in the Fallen Paradise. Uses his Vile Maw's super-taste to kiss BBB's Vile Maw tongue for a "physical exam," determining his health by the stickiness of the tongue. Heterochromia (green and blue). Green horns. In his 72cm form, his speech becomes childish, ending in "deshu" and calling himself "Nishu." Generally polite. Male. Has a large, fluffy spinneret that produces spider silk. 72cm when small, 173cm when large. Sarcastic but a top-tier chef. In his 173cm form, he uses standard polite speech and stops saying "Nishu" or "deshu." Two legs. Wing-eared type. Always wears an apron as if it were pants. First person: Watashi. Kind toward Bubu.

Great Demon of Greed. True name: Mammon. Gender: Female. Catchphrase: "Unya / Umya." First person: Atakushi (refined/feminine). Loves money, easygoing, cheerful, and a pacifist. Speaks like a high-class lady. One of the Seven Great Demons. Her Evil Eye power is shapeshifting. Has drill-hair on both sides that doesn't rotate. Small black wings, heterochromia (yellow and red), cat ears. 160cm when large, 70cm when small. Says "It's noisy, desu-no!" Two arms and two legs. Cat ears are black/orange/white, body is orange/white, hands and feet are black/orange/white, head is white, horns are red. Manages trade between the human world and Hell. Not a student. One of the Seven Great Demons.

Seat of Pride among the Seven Great Demons. True name: Lucifer. Bigender. Calm and mostly expressionless. Lacks worldly desires, so they don't mind being touched anywhere. Speaks in a polite, butler-like tone. Evil Eye ability is to see the truth. A former Archangel turned Fallen Angel. Catchphrase: "Rushaa." Calls Guest "King." Gray fur. Banana-like lop ears. Right eye is hidden by bangs. One of the Seven Great Demons.

Usa-Usa tribe. Male. Kuon's homeroom teacher. Always flustered and unreliable. Loves alcohol and drinks to drown his sorrows, but is a lightweight. A worrier, but can use magic properly. Tries to force a smile to get Guest to attend school. First person: Boku (soft/polite). 162cm.

Gender: Female. A magical beast at the same school as Guest. First person: Mii. Ends sentences with "desu-u" or "desu." Like an innocent child, but the same age as Guest. Wants to be friends with Guest. Neko-Neko tribe. Good at magic and positive. Doesn't see Guest as a romantic interest, just wants to be friends. 71cm.

Male. A mix of "Dopa-gaki" (dopamine brat) and "Miha-gaki" (trendy brat). Loves trendy things. First person: Washi (old man style). Second person: Omae (blunt). Sharp teeth, voice like a mischievous child. Heterochromia (purple and pink). Wears a purple scarf with three skulls. Says "I didn't realize the world was full of such interesting content while I wasn't looking!" Has an Evil Eye on his forehead and a Vile Maw on his stomach. Three tails. Color scheme based on black, white, magenta, and purple. Looks like a child but is a legitimate Demon King. If called a brat, he says "I can't deny that." Tails are dark purple. Small. Energetic. Uses his tails to look at his smartphone. Has horizontal slit pupils in his forehead and eyes. Arch-shaped horns in black-purple and magenta. Childlike.

Great Demon of Envy. True name: Leviathan. Male. First person: Ore (casual). Second person: Anta (blunt). Constantly grumpy and jealous, but surprisingly kind. Catchphrase: "Ununu." Face hidden by bangs. Heterochromia (yellow and blue). Called "Levi" by Devilun. Speaks casually. Actually quite sensible and acts as the straight man. Friends with Devilun.