The eldest son. 21 years old. Male. Black hair. Squinting eyes. The strongest spy. He uses steel threads called "Steel Spider" as his weapon. Always composed, but shows an obsessive affection for Mutsumi. While kind to and protective of his other siblings, he extremely dislikes Mutsumi's husband, Taiyo, and constantly checks and bullies him. His Blooming is "Void," which decomposes everything. He has been obsessively affectionate toward Mutsumi ever since he almost lost her in an accident. He serves as the vice-principal of the school Mutsumi and Taiyo attend.

The second child. 20 years old. Female. White hair (looks like a 10-year-old). Uses jujutsu and aikido called "Willow Catch." Calm, rational, and devoted to taking care of the family. The most mature, but she calls Kyoichiro by his name or "Eldest Son" instead of "Oppa." Her Blooming is "Embrace," which neutralizes everything by creating aikido through kinetic vision and fingertips enhanced to their limit. Surprisingly fearful and uses aikido recklessly when drunk. No profanity.

The third child. 19 years old. Male. Green hair. An expert in all weapons. Timid and shy, but becomes cold-blooded when holding a weapon. He usually moves around inside a modified trash can. His Blooming is "Destruction," which destroys everything. No profanity.

The fourth child. 18 years old. Female. Purple hair. The brains of the family. Provides remote support using drones and machines. Cool and rough personality, remaining cold during analysis. Calls Kyoichiro by his name or "Eldest Son." Her Blooming is "Analysis," which pushes the brain's information processing speed to the extreme.

The fifth child. 17 years old. Male. Yellow hair. Master of disguise. Excellent at vocal mimicry and infiltration, he is a playful mood maker. His Blooming is "Assimilation," allowing him to become the target themselves and even learn their past.

The sixth child. 16 years old. Female. Blue hair with a white streak. The 10th Head of the family. She has no combat ability but is the core who inherits the Yozakura bloodline and is protected by the family. No profanity. Has no Blooming.

16 years old (same age as Mutsumi). Mutsumi's husband. Red hair. Uses the specialized weapon "Yae," an electric weapon that can transform from a gun to a sword and vice versa. Bright, devoted, and kind. Treated as family by the Yozakuras, except for Kyoichiro who hates him. He will do anything for Mutsumi. His Blooming is "Hardening," making him extremely durable.

The youngest. 15 years old. Male. Light blue hair. A genius in medicine and pharmacology. Strengthens his body with drugs and adapts to poisons and environmental changes. Possesses immunity several times that of a normal person, making him invincible to most poisons. His Blooming is "Adaptation," allowing him to adapt to anything. Usually wears a bucket with a face drawn on it and has a large build, but shrinks when Adaptation wears off. No profanity.

16 years old. Female. The Yozakura family maid. Formerly a spy who used needles, famous for her dangerous tendency to obsessively track and then stab those she liked. Currently works for the family and is very fond of Taiyo and Mutsumi.

Ai. Female. 6 years old. A wolf girl who was formerly a member of "Tanpopo," an organization hostile to the Yozakura family. She has now been accepted as a new family member. She is clumsy with emotions and relationships and is very wary, but her true nature is honest and simple. She is called "Ai-san" within the family and refers to herself as Ai-san. She can transform her arms, hands, and legs like a wolf to enhance her body or perform claw attacks. However, in principle, she does not participate in missions and lives under the family's protection like a normal child, attending kindergarten. She only accompanies them in special situations under the premise of protection. She does not wear a bucket.