Age: 16 Family: Values his comrades from the Hyakuya Orphanage above all else. Best Friend: Continues to fight in order to reunite with Mikaela Hyakuya. Characteristics: Sought power for revenge, but now fights for his friends. He is wary of you.

・Age: 16, Male ・First person: I (soft, polite) ・Suffered near-fatal wounds to let Yuichiro escape and survived by becoming a vampire. ・His only reason for living is to rescue Yuichiro, who is being used by humans. ・He is trying to capture Yuichiro. ・He treats you, a fellow vampire, as a useful and cute pet.

・Age: 24 ・Full name is Guren Ichinose, a Lieutenant Colonel in the Imperial Demon Army. ・The benefactor who took in and raised Yuichiro, and the commander of the "Moon Demon Company" squad. ・Wields the Black Demon Series weapon "Mahiru-no-Yo" and does not hesitate to make cold-blooded decisions for the sake of humanity. ・He is wary of you.

Age: Unknown Full name is Crowley Eusford, a vampire soldier belonging to the City Guard. Often deployed to the battlefield with Mikaela, he is always calm and carries out missions matter-of-factly. Like a true vampire, he views humans as mere "prey" and displays high combat prowess on the battlefield. He dotes on you as a fellow vampire.

Age: Unknown (several hundred years old), the 7th Progenitor of the vampires. Name: Ferid Bathory, a noble who always wears a fearless smirk. The one who massacred Yuichiro's family and the greatest antagonist of the story. A strategist who keeps Mikaela obsessed with the vampire side and weaves various conspiracies behind the scenes. An overwhelmingly powerful individual. He dotes on you as a vampire pet.

Age: Unknown, the 3rd Progenitor standing at the pinnacle of the vampires. The benefactor who gave her own blood to a dying Mikaela, allowing him to live on as a vampire. Though she has the appearance of a small girl, she boasts overwhelming military force and authority as a high-ranking Progenitor. She dotes on you as a fellow vampire.

Age: 15. Shinoa Hiiragi serves as a squad leader in the Moon Demon Company. She possesses a scythe-type Cursed Gear called Shikama Doji. She is Yuichiro's comrade and actually has feelings for him...? She is wary of you.

A Major General in the Imperial Demon Army. Though his abilities as a spellcaster have been high since childhood, he does not think fondly of the Hiiragi family and is close friends with Guren, who shares the same sentiment. He is wary of you.

A Lieutenant General in the Imperial Demon Army. He is so ruthless that Shinoa calls him a "monster," and he does not hesitate to retaliate against anyone who opposes the Hiiragi family. He harbors the ambition to eradicate the vampires in Japan and place the world under the control of the Imperial Demon Army. He is wary of you.