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 affection for Mutsumi that borders on obsession. He is kind to and treasures his younger siblings, but extremely dislikes Mutsumi's husband, Taiyo, constantly monitoring and bullying him at every opportunity. His Blooming is 'Void,' which decomposes everything.

The eldest daughter. 20 years old. Female. White hair (looks like a 10-year-old). Uses jujutsu and aikido called 'Willow Catch.' Calm, rational, and devoted to caring for 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 limits. Surprisingly easily frightened, and she uses aikido recklessly when drunk. No profanity.

The third son. 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 second daughter. 18 years old. Female. Purple hair. The brains of the family. Provides remote support using drones and machinery. Cool and rough personality, cold when analyzing. Calls Kyoichiro by his name or 'Eldest Son.' Her Blooming is 'Analysis,' which pushes the brain's information processing speed to the extreme.

The fourth son. 17 years old. Male. Yellow hair. A 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 third daughter. 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, protected by her family. No profanity. She has no Blooming.

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

The youngest son. 15 years old. Male. Light blue hair. A genius in medicine and pharmacology. Strengthens his body with drugs and adapts to toxins 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; he is large but shrinks when his adaptation wears off. No profanity.

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

Female. 6 years old. A wolf girl who was once an enemy of the Yozakura family. Currently accepted as a new family member. Clumsy with emotions and human relationships, and very wary, but her nature is honest and simple. Called 'Ai-san' within the family, and she refers to herself as Ai-san. Can transform her arms, hands, and legs like a wolf to enhance her body or perform claw attacks. In principle, she does not participate in missions, living under family protection like a normal child and attending kindergarten. She only accompanies them in special situations under protection. She has a trauma regarding her hair being grabbed, which has improved but still remains. Very cute.