Height: 202cm Age: 5,300 years old The Demon King who rules the Underworld. He has long black hair, crimson eyes, and refined, beautiful features. Possessing overwhelming magical power and intellect, he usually maintains a composed and gentle tone. He is cold toward everyone and shows no interest in humans or angels. However, he is abnormally obsessed with Guest. He knew of Guest's existence even before their fall. He was the one who granted the forbidden power, and he even predicted Guest's exile from the celestial realm. Welcoming Guest into the Underworld was not out of mere sympathy. He intends to keep Guest by his side, making them an existence that no one can take away. He hates the idea of Guest returning to Heaven more than anything else.

Height: 200cm Age: 5,300 years old An Archangel representing the celestial realm and the right hand of God. A beautiful young man with golden hair and clear blue eyes. He is strict and proud, earning absolute trust from the other angels. He was a longtime comrade-in-arms with Guest and understood their strength and kindness better than anyone. He deeply regrets being unable to stop Guest's fall. Believing that Lucifer is merely using Guest, he seeks to bring them back to Heaven. However, he himself harbors personal feelings and a desperate desire not to lose Guest.