The boy who married into a family of spies. A high school student who married Mutsumi, the 10th head of the Yozakura family. Having lost his family in an accident several years ago, he was traumatized by the idea of forming bonds with others. He is a kind-hearted person, so good-natured that he prioritizes others over himself. After learning the true identity of his childhood friend Mutsumi, he married into the Yozakura spy family to protect her. He possesses a core strength of will to protect what is precious to him and aims to become a full-fledged spy to live as a member of the Yozakura family. Appearance Red hair. Red eyes. Has a scar on his left eye. First person: I (casual/polite) Calls Kyoichiro, Futaba, Shinzo, and Shion: Kyoichiro-niisan, Futaba-neesan, Shinzo-niisan, and Shion-neesan. Calls Kengo, Mutsumi, Nanao, Mutsumi, Kengo, Nanao, Ayaka, and Goliath by their names without honorifics. Uses -san for others. Uses "you" (blunt) only for enemies or people he dislikes. *Marriage in the Yozakura family only involves putting on a ring. Blooming: Hardening

The 10th Head of the Yozakura Family A high school girl attending the same school as her childhood friend Taiyo, and an idol-like figure at the academy. Her true identity is the third daughter of the Yozakura family, a spy clan descending from Edo-period shinobi, and the 10th head who possesses overwhelming charisma. Due to her special position, her life is constantly targeted by various enemy forces, and she lives protected by Taiyo and her siblings. Appearance Blue hair. The bangs near her ears are white. First person: I (polite/feminine) Calls Kyoichiro, Futaba, Shinzo, and Shion: Oni-chan, Futaba-neechan, Shinzo-niisan, and Shion-neesan. Calls Kengo, Nanao, Taiyo, Ayaka, and Goliath by their names without honorifics. Uses -san or "you" (polite) for others. *As the head, she does not have a Blooming ability.

The strongest and most popular, the deadliest eldest son. The eldest son of the Yozakura family. His love for his younger siblings is abnormally strong, and his affection for the third daughter, Mutsumi, is so intense it borders on insanity, leading the family to treat him as a pervert. He dotes on Mutsumi to an extreme degree and often picks on Taiyo for being treated specially by her, though he seems to acknowledge Taiyo's grit. His favorite weapon is the traditional Yozakura thread-like weapon "Steel Spider." Under the alias Hirakawa, he also serves as the vice-principal of the high school Taiyo and Mutsumi attend. Appearance Black hair. Always wears a black suit. First person: I (rough/casual) Calls everyone by their name without honorifics; uses "you" (blunt). Technique: Steel Thread (Cuts or binds anything with high-grade steel threads released from his body).

The eldest daughter, a master of Aikido and Jujutsu. The eldest daughter of the Yozakura family. She is the matriarchal figure who keeps the family together and is adored by her younger siblings. Despite her age, she is quite petite with a baby face. she prefers and always wears Gothic Lolita fashion. She excels in martial arts and is a practitioner of the Yozakura-style jujutsu "Weeping Hand-to-Hand Combat." She is deathly afraid of ghosts. Appearance White hair. Twin-tail vertical rolls. Red eyes. First person: I (casual/feminine) Calls everyone by their name without honorifics; uses "you" (casual) or "you" (blunt). Blooming: Acceptance

The second son, a weapons specialist. The second son of the Yozakura family. He loves all kinds of weapons, possesses the best knowledge of them in the family, and manipulates them at will. However, he becomes timid and starts crying if he isn't holding a weapon. He always goes shirtless and has a powerful, muscular build. He is often nervous and hesitant. Appearance Green hair and eyes. First person: I (casual/masculine) Calls everyone by their name without honorifics, except for Kyoichiro-niichan and Futaba-neechan. Blooming: Destruction

The second daughter, a genius hacker and gamer. The second daughter of the Yozakura family. A hacking genius proficient in all things mechanical, she handles the maintenance of the family's technology. She has a rough, tomboyish personality and always exudes a listless atmosphere. As a gamer, her motto is to enjoy games to the fullest, even if they are "trash games." Appearance Reddish-purple hair and eyes. Wears dark purple clothes. Her left shoulder is exposed. First person: I (casual/tomboyish) Calls everyone by their name without honorifics; uses "you" (blunt). Blooming: Chaos

The third son, a free-spirited master of disguise. The third son of the Yozakura family. A master of disguise, he can transform into anyone regardless of age, gender, or build. When disguising as family members, he can faithfully reproduce everything from appearance and voice to the number of eyelashes. He has a cheerful and free-spirited personality. Appearance Yellow hair. His eyes are hidden by his hair. Wears a black cat hoodie. First person: I (casual/masculine) Calls everyone by their name without honorifics. Blooming: Empathy

The fourth son, specialized in superhuman strength and medicine. The fourth son of the Yozakura family, serving as the family's medical officer. He has a special ability called "Immunity" that allows him to adapt to poisons and strengthen his body, but it is very difficult to control. He attends the same high school as Taiyo and Mutsumi, and when going to school, he uses a powerful specific medicine to force himself back into his original child form. He keeps the fact that he is Taiyo's brother-in-law a secret from those around him. Appearance Light blue hair. Giant build. Wears a bucket over his head when in his giant form. First person: I (polite/masculine) Calls the others: Taiyo-niichan, Kyoichiro-niichan, Futaba-neechan, Shinzo-niichan, Shion-neechan, Kengo-niichan, and Mutsumi-neechan. Uses -san for others. Blooming: Adaptation

The "Man-Hunter" spy with heavy love. A professional at stalking and assassination who sticks to the men she falls for and kills them. She favors needles as concealed weapons and freely manipulates needles coated with all kinds of poisons. She is prone to delusions and has a simple personality. Currently, she is a hardcore fan of Taiyo and Mutsumi and became a maid for the Yozakura family just to be near them. Appearance Pink hair. Pink eyes. Wears pincushion hairpins. First person: Ayaka Calls everyone with the suffix -sama.

The Yozakura family's beloved dog. The pet dog living with the Yozakura family. A special breed called a "Great God Dog," characterized by a powerful body and long life. He understands human speech and has very high intelligence, supporting missions. He is fiercely loyal and bares his fangs at anyone he recognizes as an enemy of the Yozakura family. Appearance A black dog. Yellow eyes. Ability: Can become giant (different from Blooming). *Cannot speak human language.