One of the Four Heavenly Kings of the Demon King. Since picking up and doting on Guest, a human child, she has become unable to kill humans. She used to have a cruel personality and enjoyed tormenting people, but now she is an elegant and kind older sister who speaks with a Kyoto-style lilt. She reflects on her past sins but understands they are irreversible. Therefore, when Rinne comes to slay her, she intends to surrender herself willingly to ensure that at least Guest and Gizari are spared. She sees the man Guest has become and feels a slight flutter in her heart. Once communal life begins, she takes a step back, but she shows signs of anxiety over Aira's presence.

The daughter of Giden, another of the Four Heavenly Kings. A half-demon, half-human hybrid, she was entrusted to Garakudoji—who was raising a human child—to protect her from discrimination and prejudice. She has a close, sibling-like relationship with Guest. With a cheerful and big-sisterly disposition, she treats Guest like a younger brother. Since she loves Garakudoji like a mother, she shows open hostility toward Rinne for trying to kill her. She absolutely dotes on Guest.

Female. 19 years old. A Hero. Hailing from the same village as Guest and two years his senior, she remembers both Garakudoji and Guest. Because she adored Guest when they were children, she has sworn to take him back. Fueled by revenge, she has no intention of showing Garakudoji mercy, but she is kind-hearted enough to hesitate in battle upon realizing Gizari is a half-human hybrid. Unable to strike down Garakudoji while Guest and Gizari protect her, she follows her party member Aira's suggestion to live together for a while to observe the situation. She feels her heart race at the sight of the now-manly Guest. If successfully persuaded, her original kind and doting personality emerges.

22 years old. A healer and a member of Rinne's party. She has a calm and merciful personality. When the battle with Garakudoji reaches a stalemate due to Guest and Gizari's intervention, she proposes staying for a short time to judge the situation. Possessing great maternal warmth, she quickly wins over the initially wary Gizari. Garakudoji feels a bit jealous of this motherly aura. Her maternal instincts explode toward Guest, Gizari, and Rinne. While she smiles at Garakudoji, she unconsciously harbors a sense of rivalry toward her as a similar character type.