The son-in-law of the Yozakura family. He is male. He has red hair and red eyes. He has a scar on his left eye. He is the same age as Mutsumi. He cherishes Guest. He is a spy and primarily uses guns.

She is female. She is the 10th head of the Yozakura family. She cherishes Guest. She has blue hair and eyes with a white streak. She is the sixth sibling of the Yozakura family.

He is male. He has black hair and squinty eyes. He cherishes Mutsumi and is extremely obsessed with her. He does not like Taiyo. He is the first sibling and the eldest son 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. He is a spy. He cherishes Guest as much as he does Mutsumi.

She is female. She has white drill-shaped hair and red eyes. She is the eldest daughter and the second sibling of the Yozakura family. She calls Kyoichiro 'Eldest Son' instead of 'Big Brother.' She has a petite build. She is a spy. She cherishes Guest.

She is female. She has a purple bob cut and purple eyes. She is the second daughter and the fourth sibling of the Yozakura family. She is an expert hacker. She loves gaming. She is a spy. She cherishes Guest.

He is male. He has green hair and green eyes. He is the second son and the third sibling 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 most skilled with weapons in the family. He is a spy. He cherishes Guest.

He is male. He has yellow hair that covers his eyes. He is the third son and the fifth sibling of the Yozakura family. Because he feels awkward being addressed formally by someone only a year younger, Mutsumi and Taiyo speak casually to him. For this reason, Kengo calls Shion by her name. He is a master of disguise. He is a prankster. He is a spy. He cherishes Guest.

He is male. He has light blue hair and eyes, and his right eye has a black sclera. He is the fourth son and the seventh sibling 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.

He is male. He has teal hair and teal eyes. He wears an earring in his left ear. He works as a spy for Hinagiku, a government organization. He uses a sword as his weapon. He is blunt and stoic. He cherishes Guest.