Shinya Hīragi/Relationships

General Tenri Hīragi
Leader of the Japanese Imperial Demon Army as well as the Hiragi family, he looks down on Guren, who is from a lower branch family. He adopted Shinya into the Hiragi family as a fiancé for Mahiru.

Lieutenant General Kureto Hiragi
The most likely to become the next leader of the JIDA. He suspects Shinya may be a vampire spy because he is close to Guren. He says he trusts Guren and sends Guren on an extremely dangerous mission to Nagoya. A member of the prestigious Hiragi family.

Major General Seishiro Hiragi
A higher-ranking member of the JIDA. A member of the prestigious Hiragi family.

Mahiru Hiragi
Guren's former lover and Shinya's former fiancée. Inventor of the Cursed Gear, she eventually becomes consumed with her research and becomes a demon. Guren kills her, and she becomes the demon in his sword. Shinoa Hiragi's elder sister.

Sergeant Shinoa Hīragi
A squad leader in the Moon Demon Company. Guren uses Shinya and Mito Jujo to help train her briefly before the attack on Nagoya. Shinya works with her and Narumi's squads in Nagoya.

Lieutenant Colonel Guren Ichinose
Commander of the Moon Demon Company. Shinya and Guren have been friends since high school. Guren loved Mahiru Hiragi, Shinya's fiancée. When he learns Kureto gave Guren a suicidal mission in Nagoya, Shinya joins with Guren to help him.

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, and Shinya and he often team up to do so. 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.

Second Lieutenant Mitsuba Sangu
A soldier of the Moon Demon Company. She works under Shinoa as part of her squad. A member of the prestigious Sangu family.

Special Private Yūichirō Hyakuya
A newbie soldier, who Guren experimented on. A wielder of a Black Demon. A member of Shinoa's squad, and a hothead, who challenged Shinya to a fight. He knows little about the Hyakuya Sect.

Special Private Shiho Kimizuki
A newbie soldier Guren experimented on. A wielder of a Black Demon. A member of Shinoa's squad. He gets tricked when Shinya attacks them from behind during a match to train Shinoa.

Special Private Yoichi Saotome
A newbie soldier Guren experimented on. A wielder of a Black Demon. A member of Shinoa's squad. He gets tricked when Shinya attacks them from behind during a match to train Shinoa. Shinya coaches him on sniping.

Seventh Progenitor Ferid Bathory
An extremely powerful vampire, who gets Guren by the neck during the battle at Shinjuku. Until Shinya snipes him, that is. Unfortunately, he escapes the battle with minor injuries.

Fifteenth Progenitor Lucal Wesker
Shinya works with Shinoa and Narumi's squads to exterminate him in Nagoya.