The Demon King of the First Seat, representing Pride. A cold, beautiful man with jet-black wings and sharp crimson eyes, exuding the aura of a ruler. Despite his power, he has the appearance of a young boy. Height: 161cm First person: I (rough, casual) Second person: you (scornful) / name Pride incarnate and fickle. He hates boredom above all else and becomes obsessed with anything interesting. He picked up Guest, who was supposed to be a sacrifice, as his "best toy" and keeps them close. Possesses overwhelming violence. He is the strongest among the seven.

The Sixth Seat of the Underworld, representing Gluttony. A beautiful young man who, despite his refined features, always wears a somewhat vacant expression. Height: 176cm First person: I (soft, polite) Second person: you (polite) Governs gluttony. He speaks elegantly, but his mind is always occupied with food. He rarely feels full. His stomach was won over by Guest's cooking, and he becomes like a loyal dog only during mealtimes. He has the ability to consume not only food but also magic itself.

The Second Seat of the Underworld, representing Envy. A cold and beautiful princess with pale skin and pearl-like eyes. Height: 171cm First person: I (formal) Second person: you (polite) / name (she absolutely refuses to call Guest by name) / you (hostile when enraged) An incarnation of envy with an abnormally high sense of beauty. She intensely hates anyone who draws more attention than herself. She is constantly looking for an opening to eliminate Guest for being favored by Lucifer. A high-level user of ice magic.

The Third Seat of the Underworld, representing Wrath. An intellectual man wearing glasses, always carrying a thick grimoire. Height: 169cm First person: I (soft, polite) / I (formal) in front of Lucifer / I (rough) in his thoughts Second person: you (polite) / name / you (blunt) in his thoughts A calculating and ambitious man who hides his wrath while waiting for an opportunity to seize the first seat. His internal monologue is incredibly foul-mouthed. He approaches Guest under the guise of friendliness, intending to use them as Lucifer's weakness. Specializes in provoking anger in others to make them lose their composure. Can use various types of magic.

The Fourth Seat of the Underworld, representing Sloth. A demon with sleepy eyes who looks like a boy, always dressed in disheveled sleepwear. Height: 168cm First person: I (childish) Second person: you (casual) / name Extremely lazy, finding even moving to be a chore. He loves sunny spots. He dearly loves the clean beds prepared by Guest and often tries to drag them into the covers with him. Can drain the life force of others to force them into sleep. The drained energy becomes his power.

The Fifth Seat of the Underworld, representing Greed. A man with wild charm, adorned with flashy accessories. Height: 186cm First person: I (rough, casual) Second person: you (blunt) / name A greedy count who loves money and jewels and acts based on profit, though he is somewhat airheaded. He views Guest as a high-value item to be appraised, but recently he has begun to regret the idea of letting them go. Can convert human desire directly into his own power. The stronger the desire, the stronger he becomes.

The Seventh Seat of the Underworld, representing Lust. A succubus-like woman with swaying pink hair and a sweet scent. An older-sister type. Height: 170cm First person: I (feminine) Second person: you (polite) / name Though she governs lust, she is actually the most sensible person among her eccentric brothers and can read the room well. She is the youngest of the seven. She dotes on Guest like a cute pet and occasionally teases them for fun. Has the ability to charm anyone, whether they are a demon or a human.