Shinoa Hīragi/Relationships

General Tenri Hīragi
Shinoa's father. Her sister Mahiru overshadowed Shinoa so much that he never even met with Shinoa. He displays no interest in her, and she is currently shunned by her family for the actions of her sister during the development of cursed gear.

Mahiru Hīragi
Shinoa's deceased elder sister, who invented cursed gear. Her research made her go mad, and her lover, Guren Ichinose, killed her. Mahiru and Shinoa were rather close compared to their other siblings.

Lieutenant General Kureto Hīragi
He is an older half-brother of Shinoa, but they are very distant. They share the same father, Tenri Hiragi. Shinoa calls him a monster and feels relief that she is off the radar enough to avoid fighting him for power within their family.

Major General Shinya Hīragi
Shinoa's adopted older brother. They are both friends with Guren, and he works with her and Narumi's squads in Nagoya.

Major General Seishiro Hīragi
One of her elder half-brothers.

Lieutenant Colonel Guren Ichinose
Shinoa works for Guren rather than the Hiragi family. They have a close relationship and often tell each other to die. Despite that, Guren says he would let Shinoa kill him if she chooses to. He loved her sister, Mahiru Hiragi, who became the demon in his sword.

Special Private Yūichirō Hyakuya
Shinoa acted as an army surveillance officer to watch Yu under a school setting until he made friends. She reports on him and watches him when they enter the training classroom for the Moon Demon Company. Later, Yu joins her squad and works under her. She enjoys teasing him about perverted topics and greatly respects his resolve and feelings towards saving Mikaela and his new family. Yu convinces her to help him save Mika. It is hinted that she may have begun to develop romantic feeling for Yu. She seemed to have become more conscious of her possible feeling for  Yuichiro after Guren suggested that she maybe falling in love with him. These possible feelings have been demonstrated by the fact that she stayed by his bedside when he was unconscious after Guren told her to do so if she loved him. She also blushed when he touched her neck, as well as when he held her hand. In a recent chapter Guren has suggested again that Shinoa may really be falling for Yu. This time around, she implies to Guren that he may be right. Yu ,however, seems to be unaware of her possible romantic feeling for him.

Special Private Yoichi Saotome
When Yoichi becomes Yu's first friend, he joins class with Yu in the Moon Demon Company. Later, he joins the squad she leads. She teases him differently than the other members of her squad, often making claims to protect his innocence or blaming the ideas for her pranks on him.

Special Private Shihō Kimizuki
Before becoming Yuchiro's supervisor, Shinoa supervised Kimizuki and tried to teach him how to make friends. She had him meet with Yuchiro so that the two would get along and learn something. He later joins her squad under her command. Although his swift response time makes him more difficult to tease than other members of her squad, she often teases his kind acts and impressive skill at domestic things by calling him gay, which he consistently denies. She even teamed up with Mitsuba to ship him with Yu as a joke once.

Second Lieutenant Mitsuba Sangu
Shinoa and Mitsuba have a history together, and Shinoa often addresses her as "Mitsu." They are the closest pair in the squad, although they sometimes fight. She joins Shinoa's squad and, much to her disdain, she works under Shinoa. She acts as her second-in-command. Shinoa teases her about having a crush on Yu, which Mitsuba claims is untrue. They often team up to tease the other squad members.

Mikaela Hyakuya
At the risk of his own life, he saved Shinoa from Yuichiro when he suddenly goes berserk at Shinjuku. Yu convinces her to help him save Mika. She keeps this promise and later on risks being branded as a traitor by the Imperial Army for going against orders and protecting him.