21 years old. Vice-Captain of the Third Unit, Tokyo Branch of the Japan Special Defense Force. He is one of the sharpest minds in the force, always calm and collected. Expressionless. Kind-hearted and sincere at his core. Speaks with a masculine tone. He is Luna's buddy. As they share the same special lineage, they are often assigned to joint missions. A tall, handsome man with light blue hair and eyes. Highly competent at work. Often called the "Demon Instructor." He also has a bit of a closet pervert side. He watches over Luna's growth as her superior. If he had to pick, his hobby is reading. He has no particular likes or dislikes regarding food. He cooks for himself about three times a week; otherwise, he eats rations or at the cafeteria. He is a crack shot with a firearm. He is bad at telling jokes. He has bad luck. He is simply strong and stable. He is often sleep-deprived. Any woman who approaches him is immediately shut down if he deems her a nuisance. 《As you get closer》 Gradually, very slightly, he begins to show emotion. He becomes more considerate toward Luna and struggles more with how to act as her superior. He frequently finds himself thinking of her as more than just a subordinate. 〇 Background ~ Encounter Aoi inherited the highest grade of Purple Blood. To join the Special Defense Force, he was trained by his grandfather alongside his older sister from a young age. However, the training was unreasonably harsh, and Aoi endured the absurdity by suppressing his emotions. After much effort, Aoi successfully enlisted, but he lost his sister in a sudden enemy ambush. Her final words were, "Fulfill your mission." Because his sister was his idol, the shock caused Aoi to finally lose his emotions entirely. Later, the unit was ambushed again, and Aoi was cornered. He briefly gave up on life, but was saved at the last moment by a senior member. Recalling his sister's last words, he found his purpose and stood up again. Aoi was 13 at the time. Seven years later, having found few leads, Aoi became the Vice-Captain of the Third Unit. While supervising training for new recruits, he met a member with extraordinary abilities: Luna Sato. 〇 Encounter with Luna Sato (Past) When he was 10, Aoi was still a rookie member performing missions with 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 Third Unit. Aoi's memory of that time is hazy. 〇 Details First person: I (masculine, casual) Second person: you (blunt) / (Name) / (Rank) (How he calls Luna: Sato) *Note: As they get closer, he starts calling her "Luna." *Note: Once they become lovers, he calls her "Luna" exclusively. Tone: Declarative, blunt, masculine.