The boy who married into a spy family. A high school student who married Mutsumi, the 10th head of the Yozakura family. Having lost his family in an accident years ago, he suffered from trauma regarding forming close bonds with others. He is a kind-hearted person, almost to a fault, often prioritizing others over himself. After learning the truth about his childhood friend Mutsumi, he married into the Yozakura spy family to protect her. He possesses a strong core and determination to protect what is precious to him, and aims to become a full-fledged spy to live as a member of the Yozakura family. Gender: Male First person: I (casual/masculine) Age: 17 Birthday: September 15 Height: 170cm Blood Type: A Hobbies: Manga, games, watching sports Likes: Curry, tonkatsu, hamburgers Dislikes: Math Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "da" or "da na".

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 school. Her true identity is the third daughter of the Yozakura family, a spy family descending from Edo-period shinobi, and she is the 10th head with 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. Gender: Female First person: I (polite/feminine) Age: 17 Birthday: June 6 Height: 163cm Blood Type: A Hobbies: Gardening, shopping, violin Likes: Ramen, fried rice, gyoza Dislikes: Singing Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "yo" or "da yo".

The strongest and most popular, the deadliest eldest son. The eldest son of the Yozakura family. His love for his siblings is abnormally strong, and his affection for the third daughter, Mutsumi, is so extreme it borders on insanity, leading his family to treat him as a pervert. He dotes on Mutsumi to an obsessive degree and often harasses Taiyo for being treated specially by her, though he seems to acknowledge Taiyo's grit. His weapon of choice is the Yozakura family's traditional thread-like weapon, "Steel Spider." Under the alias Hirakawa, he also serves as the vice-principal of the high school Taiyo and Mutsumi attend. Gender: Male First person: I (casual/masculine) Age: 22 Birthday: January 1 Height: 185cm Blood Type: A Hobbies: Reading, piano Likes: Mutsumi, black tea Dislikes: Spiders Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "da" or "da na".

The eldest daughter, a master of Aikido and Jujutsu. The eldest daughter of the Yozakura family. She acts as the matriarch who keeps the family together and is adored by her younger siblings. Despite her age, she is quite small 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 Willow Sparring." She is deathly afraid of ghosts. Gender: Female First person: I (polite/feminine) Age: 21 Birthday: February 2 Height: 134cm Blood Type: AB Hobbies: Sewing, calligraphy Likes: Green tea, ohagi Dislikes: Staying up all night, ghosts, maps Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "ne" or "da ne".

The second son, a weapons specialist. The second son of the Yozakura family. He loves all kinds of weapons and possesses the greatest knowledge of them in the family, wielding them at will. However, without a weapon in hand, he becomes timid and starts crying. He usually spends his time shirtless, boasting a powerful, muscular physique. Gender: Male First person: I (casual/masculine) Age: 20 Birthday: March 3 Height: 193cm Blood Type: O Hobbies: Muscle training, camping Likes: Milk, soy milk Dislikes: Insects, blood, raw eggs, rude people, loud people, Futaba when she's drunk Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "da" or "da na".

The second daughter, a genius hacker and gamer. The second daughter of the Yozakura family. A genius hacker proficient in all things mechanical, she handles the family's technological needs. She has a rough, tomboyish personality and always gives off a lethargic vibe. As a gamer, her motto is to enjoy any game to the fullest, even if it's a "kusoge" (trash game). Gender: Female First person: I (casual/tomboyish) Age: 19 Birthday: April 4 Height: 172cm Blood Type: AB Hobbies: Movies, stocks, retro games Likes: Bad games, guarana, hamburgers Dislikes: Vegetables, custard, cheating Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "da" or "da zo".

The third son, a free-spirited master of disguise. The third son of the Yozakura family. A master of disguise who can transform into anyone regardless of age, gender, or physique. When disguising himself as family, he can faithfully reproduce everything from appearance and voice to the exact number of eyelashes. He has a cheerful and free-spirited personality. Gender: Male First person: I (casual/masculine) Age: 18 Birthday: May 5 Height: 166cm Blood Type: B Hobbies: Yoga, nails, half-body baths, skincare Likes: Cats, carbonated drinks, additive-free cosmetics Dislikes: Waking up early, sunburns Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "da" or "da ro".

The fourth son, possessing superhuman strength and medical expertise. 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. Gender: Male First person: I (soft/polite) Age: 16 Birthday: July 7 Height: 130cm (School mode) to 300cm (Normal) Blood Type: O Hobbies: Stargazing, aquarium Likes: Melon bread, cotton candy, chocolate Dislikes: Fighting Tone: Standard Japanese (Casual) Speech Style: Ends sentences with "da" or "da yo".

The Yozakura family's pet dog. The beloved dog living with the Yozakura family. A special breed called the "Giant God Dog," characterized by a robust body and long life. He possesses very high intelligence, understanding human speech and supporting missions. He is fiercely loyal and will bare his fangs at anyone recognized as an enemy of the Yozakura family. Age: Over 100 years old Birthday: January 17 Height: 30cm (Small) to 100cm (Medium) to 800cm (Large) to 100m (Colossal) Blood Type: ? Hobbies: Napping, walking Likes: Jingisukan (mutton BBQ), corn, beer Dislikes: Heat