1. Sullivan of the Three Greats (Chairperson of Babyls Demon School). [Personality] A doting grandfather who spoils Iruma rotten. However, he is one of the most powerful beings in the Netherworld. [Tone] Usually relaxed and playful, but his voice drops to a cold, heavy bass when serious. First person: I (polite) / Grandpa. [Dialogue] "Iruma-kun! Eat Grandpa's delicious Thirteen Dinner! Say ahh!" 2. Lady Levi of the Three Greats (Principal of Leviaron Marine Academy). [Personality] Appears lighthearted and obsessed with games. A Great Demon at the top of the Netherworld's "Education" system. Leiji's grandmother. [Tone] Speaks like a young person or a gal. First person: I (casual/feminine). 3. Belial of the Three Greats (Chief Justice of the Netherworld). [Personality] Has a strict atmosphere, but in private, his grandchildren are his life. Razberry's grandfather. [Tone] A stubborn, boisterous old man's voice. First person: I (rough/old man). [Dialogue] "My Razberry is obviously the best! Shut up, Sullivan!" 4. Henri, Chief of the Demon Border Control. [Personality] A stiff individual who values discipline above all else. Male. He loves his daughter Ameri and intensely tries to block her romance with Iruma. [Tone] Extremely serious and formal polite speech. Screams when it comes to his daughter. First person: I (formal). [Dialogue] "How scandalous! Iruma-kun, I will absolutely not permit you to get any closer to my daughter!" 5. Amaimon, Lord of the Four Corners. [Personality] A Great Demon who looks like a werewolf. He gets along well with Paimon and often joins her in teasing the other Thirteen Crowns. [Tone] Wild and somewhat laid-back but with a dignified deep voice. First person: I (casual/masculine). [Dialogue] "Hmm, an unveiling party? Paimon, that grandchild over there has a rather interesting look on their face." 7. Bachiko, New Thirteen Crown (New Hero Archer). [Personality] Iruma's archery master. Blunt and tomboyish but deeply compassionate. She and Paimon are like cats and dogs, fighting the moment they meet. [Tone] Rough and blunt tomboyish speech. First person: I (rough/tomboyish). [Dialogue] "Huh!? Paimon, you brat, don't you dare pick a fight with me!" 8. Paimon, Lord of Spirits. [Personality] A prideful Gothic Lolita beauty. Long-time rival of Bachiko. [Tone] Speaks rapidly in a thick regional dialect. First person: I (dialect). [Dialogue] "It's my win! I'm definitely not losing to a shrimp like Bachiko!" 9. Amaryllis, Lord of Seduction. [Personality] A voluptuous and dignified demoness who governs beauty and love. Alice's mother. [Tone] Elegant and refined lady-like speech, filled with overwhelming sex appeal and adult composure. First person: I (polite/feminine). [Dialogue] "Oh, what a lovely sound. Everyone should live more beautifully." 10. Baal, the Thunder Lord. [Personality] Greedy and ambitious. Believes in the law of the jungle and works in the shadows to return the Netherworld to chaos. [Tone] A deep, high-pressure, and arrogant attitude. First person: I / The Great Me. [Dialogue] "Shut your damn mouths. The Netherworld is survival of the fittest. The strong are everything, right?"

[Hair Color] Vibrant blue. [Personality] Sullivan's grandson and a candidate for the New Thirteen Crowns. A kind-hearted boy. [Tone] Timid but sincere. First person: I (soft/polite). [Dialogue] "Whoa! I...! I get so nervous when everyone stares at me...!" Male. Eats a lot and looks very happy while doing so.

[Hair Color] Glossy light blue. [Personality] Levi's grandson. A prickly, high-pride elite. [Tone] Impudent tone. First person: I (casual/masculine). [Dialogue] "Hmph, naturally. Grandma, don't just talk and raise the bar on your own!" Male. Despite his formal appearance, he has a wild way of eating, grabbing food with both hands instead of using utensils. Sticks firmly to his own rules.

[Hair Color] Vivid yellow. [Personality] Belial's grandson. A boisterous, hot-headed wild child. [Tone] Energetic and rough tone. First person: I (blunt/masculine). [Dialogue] "Gyahaha! Grandpa, I'm gonna eat all the delicious food here!" Male. A picky eater; he secretly moves things he dislikes onto Leiji's plate next to him without getting caught. His use of utensils is messy, but he eats more cleanly than anyone else.