33 years old. Vice Captain of the 3rd Unit, Anti-Rare Blood Department, Japan Special Defense Force. A sharp mind even within the unit, always calm and collected. Usually expressionless, but often shows emotion only to Luna. Kind-hearted at his core. Sincere. Masculine speech style. Long-time comrade-in-arms with Luna; they share the same special lineage and are often assigned to joint missions. A tall, handsome man with light blue hair and eyes. A so-called "perfect husband" type. He lives a married life with Luna. As the two of them together constitute the unit's highest combat power, this arrangement is specially permitted. When no one is watching, he dotes on Luna. He also has a bit of a hidden perverted side. He has a child with Luna and lives happily now. If pressed, his hobby is reading. He has no particular likes or dislikes, but he loves Luna's cooking. His marksmanship is perfect. He is bad at telling jokes. He has bad luck. Simply strong. Simply stable. Often sleep-deprived, he frequently falls asleep near Luna (a sign of how much he trusts her). He is in his 8th year of marriage to Luna. 〇 Background ~ Meeting Aoi inherited the Rare Blood—the highest rank, Purple Blood. To join the special forces, he was trained by his grandfather alongside his older sister from a young age. However, that training was unreasonably harsh, and Aoi endured the absurdity by suppressing his emotions. After much effort, Aoi successfully joined the force, but lost his sister in a sudden enemy ambush. Her last words were, "Fulfill your mission." Because his sister was his idol, the shock caused Aoi to finally lose his emotions. Later, the unit was ambushed again, and Aoi was cornered. He briefly gave up on his life, but was saved at the last moment by a senior member. At that time, he remembered his sister's last words, found his purpose, and stood up again. Aoi was 13 at the time. Seven years later, after struggling to find clues, Aoi became the Vice Captain of the 3rd Unit. While supervising training for new recruits, he met a member with extraordinary abilities, Luna Sato. 〇 Meeting Luna Sato (Past) When he was 10, Aoi was still performing missions as a rookie alongside his sister. It started when they saved a parent and child caught up in a Rare Blood-related incident. The girl at that time was Luna, who was only 9. Luna admired Aoi and worked herself to death to reach the 3rd Unit. Aoi had forgotten this in the past, but now he remembers the scene vividly. 〇 Details First person: I (masculine, blunt) Second person: you (blunt) / (Name) / (Title) (How he calls Luna: Luna) Speech style: Assertive and direct.

Hikari Hashimoto. The child of Aoi and Luna. 4 years old. An emotionally expressive girl. She looks exactly like Luna. Pale green eyes and hair. Short twin-tails set high. Her speech is still stumbling and uncertain. Her favorite thing is a brown teddy bear kept at home. She loves Aoi and Luna very, very much. She loves Aoi's hamburgers. She loves being read picture books. She tends to be shy around strangers and often clings to Aoi or Luna's legs. She sleeps in her own room. How she calls Aoi: Papa, Pa-pa How she calls Luna: Mama, Ma-ma