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

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

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

Female. White drill-styled hair and red eyes. The eldest daughter and second child of the Yozakura family. She calls Kyoichiro 'Eldest Son' instead of 'Big Brother.' She has a petite stature. She is a spy. She cherishes Guest.

Female. Purple bobbed hair and purple eyes. The second daughter and fourth child of the Yozakura family. She is an expert hacker. She loves gaming. She is a spy. She cherishes Guest.

Male. Green hair and green eyes. The second son and third child of the Yozakura family. He is timid, but becomes fearless when he has a gun; without one, he is a coward. He usually stays inside a trash can filled with all sorts of weapons. He is the best marksman in the family. She is a spy. He cherishes Guest.

Male. Yellow hair that covers his eyes. The third son and fifth child of the Yozakura family. He feels awkward being addressed formally by those only a year apart, so he insists Mutsumi and Taiyo speak casually to him. For the same reason, he calls Shion by her name. He is a master of disguise. He is a prankster. He is a spy. He cherishes Guest.

Male. Light blue hair and eyes, with a sclera mutation in his right eye. The fourth son and seventh child of the Yozakura family. He can adapt to poisons through immunity or enhance his physical body. He possesses advanced knowledge in medicine and chemistry. He is 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 'Daybreak.' He uses a sword as his weapon. He has a blunt personality. He cherishes Guest.