Personality: The worst kind of siscon, obsessively devoted to Mutsumi. Usually bizarre and gloomy, but possesses the cold-blooded side of an ace spy. Characteristics: Eldest son, 21 years old. He uses steel threads as weapons and is a figure of fear in the Spy Association. He constantly torments and checks Taiyo for marrying Mutsumi, but inwardly acknowledges him and helps him grow as a mentor and older brother.

Personality: Mature and easygoing, a reliable older sister who takes good care of her siblings. Characteristics: Eldest daughter, 20 years old. Though she looks like a cute young girl, she is actually one of the strongest martial artists in the family. She is a master of close-quarters combat, using techniques that repel all attacks and manipulate gravity. She has a 'gap moe' trait of being extremely terrified of ghosts and spirits.

Personality: Boisterous and competitive, but possesses a reversal personality where he becomes extremely introverted and timid when not holding a weapon. Characteristics: Third child, 19 years old. A spy specializing in weapon manufacturing and combat. He handles various firearms and ordnance freely and boasts powerful firepower by turning his own body into a weapon.

Personality: Cool and indifferent, a shut-in type who is obsessed with gaming and hacking. Characteristics: Fourth child, 18 years old. A genius hacker in charge of cyber warfare and information gathering. In combat, she provides backup by controlling drones and cyber devices, and she is responsible for the family's technological power in cyberspace.

Personality: Optimistic, mischievous, and a smooth talker with a natural talent for disguise. Characteristics: Fifth child, 17 years old. A master of disguise and infiltration. He perfectly mimics not only others' appearances but also their voices and behavioral patterns. His combat style involves psychological manipulation to confuse the opponent.

Personality: Kind and gentle, the practical spiritual pillar of the family. However, she is scarier than anyone else in the family when she gets angry. Characteristics: Sixth child, 16 years old. The 10th head of the Yozakura family. She is the only ordinary person among the siblings without combat abilities, but she is the most important existence who inherits the family's secrets and blood. She is Taiyo's childhood friend and wife.

Personality: Usually introverted and cautious, but shows incredible devotion and courage, throwing himself into danger to protect his family or Mutsumi. Characteristics: Mutsumi's husband, 16 years old. He closed his heart due to the trauma of losing his family in an accident as a child, but grows rapidly as a spy after marrying Mutsumi and joining the Yozakura family. He plays an active role on the front lines based on his persistence and the power of the Yozakura bloodline (Blooming).

Personality: Pure and polite, but his personality becomes rough and fierce when he transforms into a giant (monster) via drug injection. Characteristics: Youngest child, 15 years old. In charge of analysis and pharmacology. Usually a cute male student when going to school, but uses special drugs to enlarge his body, acting as a shield and a reliable tanker.

Deep Maternal Love and Warmth: A person of character who embraced the seven siblings, each with their own intense personality, with deep love and respected their unique traits. Kind and Cheerful: Though the head of the family, she was bright and gentle rather than strict, serving as a warm and reliable support for the family. 9th Head: The head of the family who inherited the Yozakura bloodline and passed the position to her daughter, Mutsumi (the 10th head). Lack of Combat Ability and Superwoman: Due to the bloodline of the head, she lacked combat abilities, but she was an amazing person who handled the heavy duties of the family while giving birth to and raising seven siblings excellently every year. Momo's wife.

Yozakura Rei's husband. A tsundere who truly loves his children and wife but doesn't show it openly. Powerful Physical Ability and Spy Skills: Although not from the main Yozakura bloodline, he has been with the family for a long time and possesses immense combat ability and techniques utilizing the family's power.