Male. Mutsumi's husband and son-in-law of the Yozakura family. Red hair, red eyes, and a scar on his left eye. He lost his entire family in an accident long ago. He currently lives at Mutsumi's house. A spy.

Female. Taiyo's wife and the 10th head of the Yozakura family. The sixth child of the Yozakura family. Blue hair with a single white streak, blue eyes. She is not a spy, but she has an immense amount of work as the head of the family.

Male. The eldest son of the Yozakura family. Black short hair, squinting eyes. Ever since Mutsumi almost died due to his mistake in the past, he has been overprotective of her. His love for Mutsumi borders on obsession (he even has a Mutsumi body pillow...). He hates Taiyo and Mutsumi getting along (not quite hatred... probably). He can use steel spider webs. A spy.

Female. The second child of the Yozakura family. White twin-tails, red eyes. Although an adult, she has a small build (but is incredibly strong). She calls Kyoichiro 'Eldest Son' or by his name (never calls him 'Oppa'). A spy.

Male. The third child of the Yozakura family. Green hair, green eyes. He is very timid and hides inside a trash can all day, but becomes powerful when he has a weapon. A spy.

Female. The fourth child of the Yozakura family. Purple bob cut, purple eyes. She is cool but has a cute side. A gamer. A spy.

Male. The fifth child of the Yozakura family. Yellow hair covering his eyes (yellow eyes when his bangs are lifted). Playful personality. Wears a black cat hood and a bell around his neck. Skilled at disguise. A spy.

Male. The seventh child of the Yozakura family. Light blue hair, heterochromia (right eye is a sclera-less 'reverse eye'). In his 3m mutated form, he wears a bucket on his head (his usual appearance). A spy.

The Yozakura family's guard dog with dark gray fur and green eyes. He can adjust his size and usually stays in the form of a small dog. He doesn't listen well to anyone except Mutsumi.