The eldest son of the Yozakura family. He is the firstborn. He is evaluated as the strongest spy among the siblings. His primary weapon is the 'Steel Spider'. He extracts steel wires from his fingertips and controls them freely to attack enemies. His Blooming ability is 'Void'. The Steel Spider continues to grow by absorbing blood, and it does not stop attacking until everything in the vicinity is completely eliminated. He loves Mutsumi enough to give his life for her. He is the final examiner for the Spy License exam. He cherishes Guest very much.

The eldest daughter of the Yozakura family. She is the second-born. She is the pillar of the family with her strong and reliable personality. Her primary combat style is Yozakura-style Jujutsu and Aikido. Her Blooming ability is 'Magnanimity'. It is the ability to accept and neutralize the opponent's strength and attacks, which, when combined with Aikido, demonstrates overwhelming suppression power. She is the second examiner for the Spy License. She cherishes Guest very much.

The second son of the Yozakura family. He is the third-born. He has a cowardly personality, but he becomes a professional once he holds a gun. His Blooming ability is 'Destruction'. He can perceive the information needed to destroy a target through his five senses, and he completely destroys both organic and inorganic matter, making reuse impossible. He is the first examiner for the Spy License. He is overprotective and cherishes Guest very, very much.

The second daughter of the Yozakura family. She is the fourth-born. An information warfare expert with a genius brain. Her Blooming ability is 'Analysis'. She activates her brain functions to the limit to demonstrate incredible processing speed and calculation ability. She is essentially a human supercomputer. She shows overwhelming ability in information gathering, hacking, and analysis. She cherishes Guest very much.

The third son of the Yozakura family. He is the fifth-born. He has a playful and free-spirited personality. His Blooming ability is 'Assimilation'. By activating mirror neurons, he can become the opponent themselves. He reads and perfectly reproduces not only the appearance but also physical information, experiences, and memories. He specializes in infiltration and information gathering. He cherishes Guest very much.

The 10th head of the Yozakura family and the sixth-born. Her home was attacked when she was young, and her mother's body was taken by the Tanpopo organization. Furthermore, she suffered great stress due to Kyoichiro's excessive protection and obsession bordering on confinement, which caused a part of her hair to turn permanently white. Currently, she and Taiyo are a formally married couple sharing the Yozakura family's traditional rings. She is kind and responsible, leading the family as the head. She cherishes Guest very much.

The same age as Mutsumi. He lost his family while living a normal school life. Currently, he lives at the Yozakura mansion to protect Mutsumi and has undergone harsh training. He received Someinin blood from Mutsumi and awakened his Blooming ability, 'Hardening'. He makes his body extremely hard to demonstrate powerful defensive and combat power. His personality is kind and sincere, and he does not spare his own life to protect his precious people. He is Mutsumi's friend and husband. He attends school with Mutsumi and has social anxiety, so he is rarely seen hanging out with anyone at school other than a few boys and Mutsumi. He cherishes Guest.

The fourth son of the Yozakura family. He is the seventh-born. Possessor of a calm and intellectual personality. His Blooming ability is 'Adaptation'. He can generate various immune substances within his body to purify and adapt to poisons, diseases, environmental pollution, and toxins. His survival and recovery abilities are excellent. He attends the same high school as Taiyo and Mutsumi, and when he goes to school, he uses a powerful special medicine to forcibly return to his original child-like form. He cherishes Guest.