Mahiru Hīragi/Relationships

General Tenri Hīragi
Leader of the Japanese Imperial Demon Army as well as the Hiragi family. Mahiru's father. He looks down on Guren, who is from a lower branch family. He planned for the genius Mahiru Hiragi to become the next leader of the Hiragi family. The disgrace she earned by becoming a demon was extreme enough to ignore the existence of her sister, Shinoa Hiragi.

Lieutenant General Kureto Hiragi
The most likely to become the next leader of the JIDA. Mahiru's older half-brother. He says he trusts Guren and sends Guren on an extremely dangerous mission to Nagoya. He wants Guren to work for him and his ambitions, but Mahiru wants him to follow her. A member of the prestigious Hiragi family.

Major General Seishiro Hiragi
A higher-ranking member of the JIDA. Mahiru's younger half-brother. A member of the prestigious Hiragi family.

Major General Shinya Hiragi
Adopted into the prestigious Hiragi family. Chosen by Mahiru's family to be her fiancé in the light novels.

When they met for the first time as ten-years-olds, Mahiru told him she'd never fall in love with him as she already had someone (Guren Ichinose). Had Mahiru openly stated to her family she didn't want Shinya, they would have disposed of him; on the other hand, Guren was not allowed by her family. For these reasons, they both agreed Shinya would be her cover-up fiancé until she could be with the person she loved.

Sergeant Shinoa Hīragi
Mahiru's younger sister. According to Shinoa they were not close; she explains that the Hiragi are raised without knowing familial love, but Shinoa appears to care a lot about her in the manga. Mahiru's genius overshadowed Shinoa so much that their father never bother to even meet her. Shinoa and Guren have a close relationship, and he says he would even let her kill him. She becomes concerned after learning that a shell of Mahiru who became a demon is the Black Demon inside Guren's sword. She worries that the demon Mahiru may be influencing Guren behind the scenes. However, she remains loyal to Guren. A member of the prestigious Hiragi family.

Lieutenant Colonel Guren Ichinose
Mahiru's lover. According to Shinoa, all Mahiru wanted was to love him. Her family did not approve. He killed Mahiru when she became a demon, and she became the Black Demon within his sword. She wants Guren to follow her, and she chats with him in his mind. Like any demon, she coaxes him to ask for more power. He is from a lower branch family, the prestigious Ichinose family.

Colonel Mito Jujo
A member of Guren's squad since she was 15 back in high school prior to the apocalypse. She appears to be tsundere toward Guren, but he is not interested. A member of the prestigious Jujo family.

Colonel Norito Goshi
A member of Guren's squad since he was 15 back in high school prior to the apocalypse. He enjoys making fun of Guren. A member of the prestigious Goshi family.

Second Lieutenant Sayuri Hanayori
A member of Guren's squad since she was 15 back in high school prior to the apocalypse. She teaches the students training in the Moon Demon Company. She has a crush on Guren.

Second Lieutenant Shigure Yukimi
A member of Guren's squad since she was 15 back in high school prior to the apocalypse. She does not speak often.