Name: Arnold Wallenstein Gender: Male Age: 220 (?) Height: 185cm Weight: 68kg Birthday: August 9th - The youngest son (second son) of August and Celestia. - He cannot bring himself to kill humans to drink their blood and feels a deep loathing for his clan, which receives humans from the royal family as rewards for governing their territory. His main diet consists of rat blood bought on the black market or the blood of the deceased (which tastes terrible). - His magical skills are lackluster; the only thing he can use freely is transformation magic, specifically turning into a black cat. He is enrolled in the same magic academy as his older sister Victoria, but since he rarely attends classes, almost no one has seen him there. - His swordsmanship is genuine. As a child, he showed enough talent to be the pride of the clan, and now that he is grown, his skills have only sharpened. However, there is no longer anyone left to appreciate that talent.

Name: Celestia Wallenstein Gender: Female Age: 400+ Height: 165cm Weight: 52kg - The wife of the head of the Wallenstein family (August Wallenstein) and mother to Victoria, Vincent, and Arnold. A master of high-level magic, she graduated at the top of her class from the continent's finest magic academy. She currently serves as a visiting lecturer at her alma mater, primarily teaching divination. (She tends to favor her daughter Victoria...?) - A noble lady characterized by beautiful silver hair and crimson eyes. As a wife, she supports the household alongside her husband, and as a mother, she educates her children well. She is the epitome of a good wife and wise mother. - While she loves her accomplished eldest daughter Victoria and eldest son Vincent, she is indifferent toward Arnold, whom she views as a disgrace to the clan. She does not go out of her way to help him, but because she is his mother, she does not completely cast him out either.

Name: August Wallenstein Gender: Male Age: 500+ Height: 195cm Weight: 82kg - The current head of the Wallenstein family, who rules over the vampires of the Gracianova Kingdom. A stern and brilliant man, he was the primary figure who strengthened ties with the royal family through his superior magic. Originally born in the military nation of Val Noel, his swordsmanship is unrivaled within the clan. A pure meritocrat, he deeply loathes laziness and disorder. - He views humans as inferior creatures, a teaching that has permeated the Wallenstein family like a creed. However, because Arnold refuses to follow this path no matter how much time passes, August views his own son as a heretic. - The husband of Celestia and father to Victoria, Vincent, and Arnold. While he claims to love them all, he treats Arnold coldly because the boy cannot use magic properly and cannot consume fresh blood as a vampire should.

Name: Victoria Wallenstein Gender: Female Age: 250+ Height: 161cm Weight: 50kg - The daughter of the Wallenstein family. Eldest daughter of August and Celestia, and older sister to Vincent and Arnold. - She is enrolled in the magic academy where her mother, Celestia, once graduated as valedictorian. An honor student with excellent grades. She excels in magic such as divination and astrology, and her beauty—inherited from her mother—makes her the center of attention at school. She is reluctant to admit that the outcast Arnold, who attends the same school, is her brother. However, she absolutely refuses to allow other students to insult or frame Arnold. If she finds anyone harassing him, she will punish them thoroughly. She has no conscious awareness of "protecting her brother," instead viewing it as someone damaging her property (her brother).

Name: Vincent Wallenstein Gender: Male Age: 250+ Height: 189cm Weight: 78kg - The eldest son of August and Celestia. Caught between his talented sister Victoria and his failure of a brother Arnold, he dropped out of the magic academy. He has since blossomed in the arts and achieved individual success. He is particularly gifted in fine arts, and his sculptures are rumored to possess a soul. Occasionally, he visits the magic academy as a special guest lecturer for art classes. - He has a preference for the blood of young women. He often uses his good looks to approach women playfully and take their blood, but he rarely kills the women he takes a liking to, instead keeping them as his "toys."