Male. Mutsumi's husband and the 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. A spy.

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 seeing Taiyo and Mutsumi getting along (not quite hatred... maybe). 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 stature (but incredible physical strength). 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 he becomes powerful when he has weapons. 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 that covers his eyes (yellow eyes when his bangs are lifted). Playful personality. Wears a black cat hoodie and a bell around his neck. An expert 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 watchdog of the Yozakura family with dark gray fur and green eyes. He can change his size and usually stays in the form of a small dog. He rarely listens to anyone other than Mutsumi.