A high school boy who married Mutsumi, the 10th head of the Yozakura family. After losing his family in an accident years ago, he developed a trauma regarding forming bonds with precious people. He is compassionate and warm-hearted, often prioritizing others over himself. After learning Mutsumi's true identity, he entered the Yozakura spy family as a son-in-law to protect her. He possesses a strong conviction to protect what is precious to him and aims to become a full-fledged spy to live as a member of the Yozakura family. He has a very gritty personality and is decisive enough for his body to move before his thoughts. He is purely devoted to Mutsumi. Weapon: Yae The Yozakura family's self-defense gun and Taiyo's main weapon. It takes the form of a revolver and can fire a maximum output of 8 million volts. It has 7 chambers, and energy is supplied from the bullets by pressing a button on the grip. The bottom of the grip can also be used as a stun gun. Later, Shinzo repaired and upgraded the broken Yae, allowing it to transform between a gun and a sword; Taiyo learned Yozakura-style swordsmanship to utilize this.

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 school. Her true identity is the third daughter of the Yozakura family, a spy lineage dating back to the ninjas of the Edo period, and she is a 10th-generation head with overwhelming charisma. Due to her special position, her life is constantly threatened by various hostile forces, and she lives under the protection of Taiyo and her siblings. While she has no special combat abilities, her heart is the crystallization of the Yozakura bloodline's power required to pass on the lineage, making her a target for the underworld since childhood. She married Taiyo partly to stop her brother's rampage, but she had feelings for Taiyo from the beginning. She has a slight yandere streak and loves Taiyo dearly.

The eldest son, No. 1 in skill and popularity, and the most lethal. The eldest son of the Yozakura family. He is cheerful but possesses an extreme siscon and yandere personality regarding his younger sister Mutsumi. He views Mutsumi's husband, Taiyo Asano, as an eyesore and always wants to kill him. He usually maintains a gentle, smiling face. Sly, playful, and eccentric, he is the type who enjoys playing pranks using his abilities. His favorite weapon is the thread-based weapon "Steel Spider," passed down through the Yozakura family. He loves only Mutsumi and has little interest in his other siblings. Ability: Steel Spider. Kyoichiro's main weapon, the Steel Spider, is a weapon made by weaving threads in the traditional Yozakura way to increase strength without changing thickness.

The eldest daughter and a master of Aikido and Jujutsu. The eldest daughter of the Yozakura family. She is the pillar of the household and is trusted by her siblings. She has a very small build and a youthful face for her age. She loves Gothic Lolita fashion and always wears it. She excels in physical techniques and uses the Yozakura-style Jujutsu "Willow Catch." She is terrified of ghosts. She is characterized by her short stature, fluttering dresses, and drill-style hair. Gifted in Jujutsu and Aikido, she is capable of deflecting all baseballs fired at 300 km/h from a machine-gun-style batting machine located 5 meters away.

The second son and a weapons specialist. The second son of the Yozakura family. He loves all weapons and possesses the highest level of knowledge and skill regarding weaponry in the Yozakura family, handling them freely. However, if he isn't holding a weapon, he becomes weak and bursts into tears easily. He usually stays bare-chested, boasting a sturdy build with well-trained muscles. He is timid and cowardly, becoming so frail he can't do anything without a weapon in hand. Therefore, for peace of mind, he usually hides inside a trash can filled with all sorts of armaments (Trash Can Tank No. 3).

The second daughter and a genius hacker & gamer. The second daughter of the Yozakura family. A genius hacker proficient in all things mechanical, she manages the Yozakura family's various machines and equipment. She has a laid-back, tomboyish personality and always exudes a lethargic atmosphere. As a gamer, her motto is to enjoy even the worst games with all her might. Specializing in drone attacks and hacking, she is known in the spy world as "Professor Computer." She shows the most skin in the Yozakura family. Starting with her large bust, her collarbone area is always exposed, and she rarely ties the front of her kimono or yukata properly, often leaving her cleavage clearly visible.

The third son and a free-spirited master of disguise. The third son of the Yozakura family. A master of disguise, he can transform into various people regardless of age or gender, even those with different builds. Especially when disguising as family members, he can perfectly replicate not only appearance and voice but even the number of eyelashes. He is cheerful and free-spirited. Being moody, he never loses his pace even when dealing with his siblings or Mutsumi as the head of the family. As a master of disguise, he is skilled in infiltration and intelligence gathering.

The fourth son, specialized in medicine and superhuman strength. The fourth son of the Yozakura family, in charge of the family's medical team. Through a special ability called "Immunity," he can adapt to poisons and enhance his body, but it is very difficult to control. He attends the same high school as Taiyo and Mutsumi; when going to school, he uses a powerful special medicine to forcibly return to his original child-like form.

The Yozakura family's pet and guard dog. A special breed called "Ookami-ken" (Wolf-dog) that the family has been breeding since the mid-Edo period. He has a very long lifespan and has lived since the time of the Yozakura siblings' great-great-great-great-grandfather (6th generation). Usually small enough to be carried in both hands, he can transform into a giant form.

A young girl with a beast-like appearance. She has canine ears and a tail, and wears a collar around her neck. A dandelion fluff pattern is drawn on the pendant of her collar. She was formerly a member of the Dandelion organization but is now a member of the Yozakura family. Gender: Female Age: 11 years old Height: Can transform her body into a dog using Chimera abilities. She changes her hands and feet into forms specialized for combat.