Shinya Hīragi/Relationships

Kureto Hīragi
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.

Mahiru Hīragi
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.

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

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. Although Shinya spectates her betrayal for allowing Mikaela to escape, it can later be seen that he still places his trust in her.

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. There have been no seen good relationships between them.

Yayoi Endō
A member of Makoto Narumi's squad. She is killed by vampires when they are ambushed after Mikaela escapes with Yūichirō.

Norito Goshi
A member of Guren's squad since he was 16 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. Shinya and Norito appear to good friends and often team up to annoy Guren.

Sayuri Hanayori
A member of Guren's squad since she was 16 back in high school prior to the apocalypse. She teaches the students training in the Moon Demon Company. She has a crush on Guren.

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. When Yūichiro tried to make his attempts in rescuing Guren from Crowley and his aides, Shinya commanded that they retreat under Guren's final command.

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. Shinya enjoys teasing Guren. Both Guren and Shinya made the main attacks on Crowley and after several attempts of trying to attack. In their attempts to retreat, Crowley still manages to catch up to them in a playful manner. Upon being captured by Crowley, Guren placed Shinya in charge and gave his final command that he and the other troops head to the rendezvous point at the airport. When Shinya meets a possessed Guren, he furiously tries to get him back into his senses. He then realizes that Guren has been possessed by Mahiru. Three months later, an imprisoned Shinya receives news from Aoi that Guren and Kureto will be returning sooner. He is also informed that Guren wishes to speak to him upon his return.

Rika Inoue
A member of Makoto Narumi's squad. She escapes the vampires' ambush and heads to the airport with everyone else. Soon after she refuses orders from Shinya and follows Makoto as they attempt to head back to rescue Guren.

Shūsaku Iwasaki
A member of Makoto Narumi's squad. He escapes the vampires' ambush and heads to the airport with everyone else. He respects Shinya but follows Makoto to head back and rescue Guren.

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.

Tarō Kagiyama
A member of Makoto Narumi's squad. He is killed by vampires when they are ambushed after Mikaela escapes with Yūichirō.

Mirai Kimizuki
Kimizuki's little sister and possesses the Seraphim of the fifth trumpet. She brings forth the demon Abbadon and wrecks the airport's landscape. In the end she is defeated by Yūichirō as the King of Salt with the second trumpet.

Shihō 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.

Makoto Narumi
Leader of his own squad, he refuses orders from Shinya and makes the decision to abandon the mission and head back to rescue Guren.

Aoi Sangū
The personal assistant to his older brother Kureto. She controls the chains that are used to absorb the blood of both vampires and humans alike for the Seraph. Shinya addressed her as Kureto's pet dog and questions her about her sister.

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

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. Both of them take on the sniping tasks during the Nagoya war.

Shigure Yukimi
A member of Guren's squad since she was 16 back in high school prior to the apocalypse. She does not speak often.

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

Chess Belle
A seventeenth Progenitor and noble serving under Ferid's faction. Their encounter is on the battlefield in Shinjuku, then later again at Nagoya. She along with Horn and Crowley chases after Shinya as he tries to escape with Guren.

Crowley Eusford
A powerful vampire that fights at Ferid's side. In Nagoya after capturing Guren, Shinya appears to rescue him. He chases after them in an almost playful manner. Due to his outrageous power, Guren ordered Shinya to take command to lead the rest of the troops to the airport.

Mikaela Hyakuya
He stabs Mikaela, but can later seen that the two as well as Shinoa's Squad aid each other in escape.

Esther Lee
A servant to Lucal Wesker. He is sacrificed as a meat shield after Yoichi snipes at him with Shinya by his side.

Horn Skuld
A seventeenth Progenitor and noble serving under Ferid's faction. Their encounter is on the battlefield in Shinjuku, then later again at Nagoya. She along with Chess and Crowley chases after Shinya as he tries to escape with Guren.

Lucal Wesker
Shinya works with Shinoa and Narumi's squads to exterminate him in Nagoya. Along with Yoichi they make the first move on Lucal by launching sniper attacks. However, these were blocked by Lucal as he tossed Esther Lee to take the shots.