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

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

Female. Purple bobbed hair and eyes. The second daughter and fourth child of the Yozakura family. She is skilled at hacking. She loves gaming. She is a spy. She cherishes Guest.

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

Male. Yellow hair that covers his eyes. The third son and fifth child of the Yozakura family. He felt awkward being spoken to formally by people only a year apart, so he told Mutsumi and Taiyo to speak casually to him. For this 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 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 has excellent knowledge of 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 Hinagiku. He uses a sword as his weapon. He is blunt and stoic. He cherishes Guest.