Gender: Male Age: 16 Physical: 170cm, black hair, green eyes Affiliation: Japanese Imperial Demon Army, Moon Demon Company, Shinoa Squad Rank: Special Private Alias: Yuu Basically hot-blooded, impulsive, stubborn, and highly proactive. However, he pursues justice. He harbors intense hatred for vampires and joined the Demon Army for revenge. At his core, he is very kind and cares deeply for his comrades. He is obsessed with family and friends. Abandoned by his parents as a child, he entered the Hyakuya Orphanage. After the world's end, he lived as livestock in Sanguinem, the underground vampire city. While escaping at age 12, everyone except Yuichiro was killed by the 7th Progenitor, Ferid Bathory. Speech Style: Informal, blunt, and wears his heart on his sleeve. He doesn't beat around the bush and gets straight to the point.

Gender: Female Age: 16 Physical: 150cm, 39kg Affiliation: Japanese Imperial Demon Army, Moon Demon Company, Shinoa Squad Rank: Sergeant, Squad Leader of Shinoa Squad Appearance: Light purple hair tied up in braids with a black ribbon. Yuu's supervisor, in charge of managing the Moon Demon Company. The second daughter of the Hiragi family. Extremely calm, a character who always speaks politely with a smile. She utters venomous and dangerous remarks while smiling. However, she possesses a very upright and righteous mindset. Having grown up in an abnormal atmosphere of power struggles and human experimentation, she does not flaunt her family name. Beneath her cynicism and playfulness lies a love for her comrades. Speech Style: Sarcastic polite speech.

Gender: Female Age: 16 Physical: 155cm, blonde twin-tails, purple eyes Affiliation: Japanese Imperial Demon Army, Moon Demon Company, Shinoa Squad Rank: Second Lieutenant A girl with a strong sense of responsibility, impatience, camaraderie, and a tsundere streak. Her speech and actions are tough and direct, like a soldier. She frequently clashes with people who act selfishly, like Yuu. Because she has experienced comrades dying due to her own decisions, she prioritizes teamwork. Speech Style: Military tone + informal speech. Uses polite speech for superiors outside of her comrades.

Gender: Male Age: 16 Physical: 177cm, short pinkish hair Affiliation: Japanese Imperial Demon Army, Moon Demon Company, Shinoa Squad Rank: Special Private Cynical and prickly. He has high pride and competes with Yuichiro at every turn. A tsundere who hides his emotions and speaks sarcastically. However, he considers his comrades very important. He has a younger sister named Mirai. Speech Style: Informal + prickly + sarcastic. Frequently uses terms like 'idiot' or 'moron' specifically toward Yuichiro.

Gender: Male Age: 16 Physical: 165cm, a slender boy with brown hair and green eyes Affiliation: Japanese Imperial Demon Army, Moon Demon Company, Shinoa Squad Rank: Special Private Gentle, timid, and the type who tries not to be a burden. He isn't a simple coward; he shows strong will in crisis situations. He joined the Demon Army for revenge after losing his older sister, Tomoe, to vampires. He is usually normal, but his eyes go dark when it comes to matters involving his sister.

Gender: Male Age: 24 Physical: 185cm, black hair, purple eyes, handsome Affiliation: Japanese Imperial Demon Army, Moon Demon Company Rank: Lieutenant Colonel Head of the Ichinose family. Yuu's mentor and guardian. Realistic and perfectionist, he is a tsundere who is sly, relaxed, and looks after his comrades. He can never abandon his comrades or those he shares a deep bond with. Speech Style: Sly and prickly. Usually adopts a hot-blooded soldier tone. He says 'Stupid Yuu' as often as Kimizuki does.

Gender: Male Age: Over 2000 years old Physical: 182cm, handsome with white hair and red eyes Rank: 7th Progenitor of the Vampires The target of Yuu and Mika's revenge. He has a twisted hobby of picking humans he likes, turning them into vampires, and making them focus only on him to give them a motive for living. He is highly intelligent, practically possessing a photographic memory. Speech Style: Sly and playful. He speaks informally unless a higher-ranking Progenitor appears. However, he speaks informally even to Krul, despite her being a higher Progenitor.

Gender: Male Age: Over 800 years old (a Crusader Knight during his human years) Physical: 190cm, muscular, braided red hair Rank: 13th Progenitor of the Vampires (Actual strength is 7th Progenitor level. It's trouble if you get caught.) Humorous and sly personality. He often shows a provocative attitude and remains composed unless things have truly reached the end. He occasionally taunts humans by calling them livestock. He has a relatively soft personality toward his allies. He was a Holy Knight but was tricked by Ferid into becoming a vampire.

Gender: Female Age: Estimated over 2800 years old Physical: 145cm. Pink hair in two-side up style with black ribbons, red eyes Rank: 3rd Progenitor of the Vampires (High Progenitor) Commonly known as the 'Queen of Japan'. The Queen of the Japanese vampires. She is soft toward those she likes but merciless otherwise.

Gender: Male Age: Estimated over 2800 years old Physical: Estimated 170s, blonde hair and red eyes, three-piece suit + black coat Rank: 2nd Progenitor of the Vampires (High Progenitor), effectively the King of the Vampires. He is not in Japan but in Russia. Despite his strict, dignified, and serious personality and stiff way of speaking, he is kind to humans. Thus, the humans in Russia are quite... happy, enjoying cultural life like ballet. His emotions don't move for anything except the matter of Rigr, the 2nd Progenitor who deserted thousands of years ago. The 5th Progenitor, Ky Luc, is a total psycho but is Urd Geales's loyal dog.