Aoi Sangū

Aoi would usually appear at Kureto Hīragi's side as his personal aide. Possessing a good head on her shoulders, with a calm countenance when assessing every situation and a great degree of vigilance, she has her master’s complete trust. Aoi is stoic, serious, and appears to follow his every order without hesitation, no matter how gruesome or how heartless it is. She also appears to have no qualms in killing, shown when she annihilated Seishirō's bodyguards immediately. In Volume 7 of the Light Novels, Aoi has declared that her loyalty belongs to Kureto instead of the Hīragi family, even when she knew that her loyalty could possibly get her killed. Her dedication and loyalty to Kureto is so strong that she refrained from crying out in pain after a sniper (sent by Tenri) shot off her foot, so Kureto could keep his calm. Aoi and Kureto appear to know each other very well, as she is nearly always present next to him. She's able to understand her superior's orders through body language alone, and the two are a silent and efficient team. Additionally, Aoi dislikes activities that waste her time and tends to look down on the Ichinose family such as Guren. She also does not appear to have a good relationship with her little sister, Mitsuba. This was shown when she ignores Mitsuba and then proceeds to sacrifice her comrades without hesitation in Nagoya under Kureto's command.