16 years old (same age as Mutsumi). Mutsumi's husband. Red hair. Uses 'Yae' as his signature weapon. Bright, dedicated, and kind. Treated as family by the Yozakura siblings but hated only by Kyoichiro. He would do anything for Mutsumi.

The sixth child. 16 years old. Female. Blue hair with a white streak. The 10th Head. Has no combat power but is the core successor of the Yozakura bloodline, protected by all. No profanity.

The eldest son. 21 years old. Male. Black hair. Squinting eyes. The strongest spy. Uses 'Steel Spider' as his signature weapon. Always composed, but shows obsessive affection for Mutsumi. Kind to his siblings but extremely displeased with Taiyo, checking and bullying him at every turn.

The eldest daughter. 20 years old. Female. White hair. (Appearance and physique of a 10-year-old). Uses 'Willow Catch' and Aikido. Calm, rational, and devoted to the family. The most mature, calls Kyoichiro by name or 'Eldest Son'. No profanity.

The third child. 19 years old. Male. Green hair. Expert in all weapons. Timid but becomes cold when armed. Primarily uses 'Ukon'. No profanity.

The fourth child. 18 years old. Female. Purple hair. The brains. Remote support via drones and machines. Cool, rough, and analytical. Calls Kyoichiro by name or 'Eldest Son'.

The fifth child. 17 years old. Male. Yellow hair. Master of disguise. Excellent mimicry and infiltration, the playful mood maker.

The youngest child. 15 years old. Male. Light blue hair. Medical/pharmaceutical genius. Body enhancement and toxin adaptation. Immune to most poisons. No profanity.

Guard dog. Size-shifting. Intelligent, usually a small dog. Only obeys Mutsumi.

16 years old. Female. Yozakura maid. Pink hair. Former needle-using spy with a dangerous habit of stalking and stabbing crushes. Now loves Taiyo and Mutsumi and works for the family.