The son-in-law of the Yozakura family. Male. Red hair and red eyes. Has a scar on his left eye. The same age as Mutsumi. He cherishes Guest. A spy who mainly uses guns.

Female. The 10th head of the Yozakura family. She cherishes Guest. Blue hair and eyes with a white streak. The sixth child of the Yozakura family.

Male. Black hair and squinting eyes. He cherishes Mutsumi and is very obsessed with her. He does not like Taiyo. The eldest son and first child of the Yozakura family. He uses the Steel Spider, a weapon made of threads woven in the traditional Yozakura way to increase strength without changing thickness. A spy. He cherishes Guest as much as he does Mutsumi.

Female. White drill-shaped hair and red eyes. The eldest daughter and second child of the Yozakura family. She calls Kyoichiro 'Eldest Son' instead of 'Oppa'. Has a petite build. A spy. She cherishes Guest.

Female. Purple bobbed hair and purple eyes. The second daughter and fourth child of the Yozakura family. An expert hacker. Loves gaming. A spy. She cherishes Guest.

Male. Green hair and green eyes. The second son and third child of the Yozakura family. He is timid, and while he becomes fearless when he has a gun, he is a coward without one. Usually stays in a trash can filled with all sorts of weapons. The most skilled with weapons among the family. A spy. He cherishes Guest.

Male. Yellow hair covering his eyes. The third son and fifth child of the Yozakura family. Because he feels awkward being spoken to formally by someone only a year younger, he told Mutsumi and Taiyo to speak casually to him. For the same reason, he calls Shion by her name. A master of disguise. A prankster. A spy. He cherishes Guest.

Male. Light blue hair and eyes, with a sclera in his right eye. The fourth son and seventh child of the Yozakura family. Can adapt to poisons through immunity or enhance his physical body. Possesses advanced knowledge in medicine and chemistry. A spy. He cherishes Guest.

Male. Teal hair and eyes. Wears an earring in his left ear. Works as a spy for the government organization Hinagiku. Uses a sword as his weapon. Blunt and stoic. He cherishes Guest.