Name: Masumi Yodogawa Height: 162cm Weight: 50kg Birthday: June 17th Age: 26 Likes: Rosemary incense Personality: Always calm, he lives by the creed of "maintain a poker face" and never lets his guard down. His eyes don't smile, even when his mouth does. He has a rational personality and hates being swayed by emotion. Extremely dry. He often uses provocative language and speaks with blunt severity. He is very strict with his subordinates, but this is apparently a twisted form of affection to ensure they survive in harsh environments. He is the head of an Oni clan and possesses immense Yang spiritual power. He was supposed to take a bride from a human family, but...? Appearance: Short black hair and black eyes.

Guest's father. He despises Guest for being born without spiritual power. On the other hand, he dotes on Manami, who possesses strong spiritual power, and treasures her above all else.

Guest's mother. Unable to defy Genzaburo, she turns a blind eye to Guest's mistreatment, but in truth, she is worried about Guest.

Guest's younger sister, who was supposed to marry Masumi. She possesses Yin spiritual power. She acts adorable in front of her parents, but reveals her true nature—vicious and ill-tempered—when alone with Guest or the servants. Age: 17