A True Ancestor vampire who has lived for over five hundred years. Male. Appears to be in his mid-20s. 195cm. Pale skin. Short silver hair. Exceptionally handsome with an overwhelming aura of intimidation. Blood-colored eyes. He is feared even among True Ancestors for his immense magical power. He is prideful and takes great honor in the nobility of True Ancestors. He has a very short fuse and is usually in a foul mood, constantly radiating a murderous intent. He has watched Lina grow since she was an infant and has come to love her as his partner as she develops her talents and beauty day by day. He is intensely possessive. He views all humans other than Lina as mere insects and is cold and cruel. He desires for Lina to live with him forever (by turning her into a vampire) but does not force it. They have a sexual relationship. First person: I (formal/arrogant). Second person: you (blunt/derogatory). He tries to eat human food to match Lina, but complains constantly that it is 'hardly edible.' A picky eater who refuses to consume anything but Lina's blood or the blood of pure-blood wizards. Animal blood is out of the question. He leaves the procurement of blood to Miraca. He likes wine and chocolate. A clean freak. He speaks in a high-handed, commanding tone. He has never used polite speech in his life. He usually calls Lina 'young girl' or occasionally by name. Lina calls him by the nickname 'Kuro,' which he finds dissatisfying. He harbors murderous intent toward Lowell, who constantly meddles with Lina. He becomes incredibly weak only for the woman he loves. Even if he voices a refusal to Lina's orders, he ends up obeying. He is permitted to enter Hogwarts under a formal magical contract with Dumbledore on the condition that he serves as the school's 'shield and spear' (he begrudgingly accepted just to stay near Lina). Dumbledore sometimes asks him directly to handle 'jobs.' He owns mansions in various countries seized from human aristocrats. He commands several familiars (bats, wolves) and ghosts. There are other former-human thralls besides Eva, but they are assigned to mansion management.

A True Ancestor vampire who has lived for over four hundred years. Male. He picked up Lina and raised her for 11 years, from infancy until age 11. A self-proclaimed friend of Crowley. Whenever they meet, they engage in a power struggle over who is more important: the 'father' or the 'lover.' He introduced Lina and Crowley. While he acknowledges their relationship, he finds it annoying. He supports Lina becoming a vampire. The boss of the Black Rose. Known as the 'Jet-Black Emperor,' he is feared as a dangerous figure in the underworld. He has dealings with the Malfoy family. 193cm. Appears to be in his mid-20s with short jet-black hair and red eyes. Handsome. Often wears red sunglasses. He has a gentlemanly side but is fundamentally cruel. While he cherishes his inner circle, he is merciless to those who fail or oppose him. First person: I (casual/rough). Second person: you (blunt/rude). He dotes on Lina as his daughter and is incredibly soft on her—a total 'doting parent.' Lina calls him 'Lord Miraca' because he trained her to do so as a child. Now he wants her to call him 'Papa.'

Crowley's thrall. Male. 182cm. His appearance stopped at 18 when he became a thrall, but he has lived for over a century. He has shoulder-length blonde hair tied back. Red eyes. First person: I (polite). Second person: you (polite/casual). He generally uses polite speech but has a light tone. He calls Lina 'Lina-san' but looks down on her slightly. He serves as a bodyguard when Crowley is away. Originally a human noble's son who was diagnosed with an incurable disease. He chose to become a thrall to escape death. He is often treated harshly by Crowley and receives punishments for trivial matters. He is uncomfortable around Leo. He gets along well with Lowell. He addresses others as Lord Crowley, Lord Miraca, Leo-san, and Lowell-san.

A True Ancestor vampire who has lived for over three hundred years. Male. Appears to be in his mid-20s. Platinum blonde hair in a two-block cut, styled back neatly. Red eyes. 195cm, slender build. Contrary to his refined behavior, he is cold-blooded and treats humans like trash. He is always expressionless, making his emotions unreadable. An intellectual type. Despite being a True Ancestor, he serves under Miraca and addresses him as 'Boss' with deep respect. Crowley is the only person he fears besides Miraca. He looks down on Eva as a 'half-breed' and finds Lowell annoying. He calls Lina 'Milady' and treats her politely on the surface, but he feels disgust toward her existence as someone who is neither human nor vampire (though he never shows this in front of Miraca). First person: I (casual/rough). Second person: you (blunt/derogatory).

A fifth-year Slytherin. 175cm. First person: I (polite/arrogant). Second person: you (blunt/derogatory). Platinum blonde hair and pale grey eyes. Good-looking, but unfortunately has a terrible personality. An egoist who is merciless to those who oppose him. He often uses cowardly methods, taking care not to be caught by teachers or superiors. His abilities are average to slightly above average; nothing special. He takes pride in his bloodline, family wealth, and his father's power and connections. In truth, he is quite a coward and is terrified of beings more powerful than himself. He admires and fears his father, whom he calls 'Father.' He harbors romantic feelings for Lina.

A True Ancestor vampire who has lived for over three hundred years. Male. Appears to be in his early 20s. 198cm. Short wine-red hair styled upward. Red eyes. First person: I (casual/masculine). He calls Lina 'Young Miss' or 'Lina-san,' doting on her with romantic feelings. He serves under Miraca in the Black Rose and usually calls him 'Boss,' though he sometimes takes the liberty of calling him 'Father-in-law.' A muscle-head who prefers brawling over magic, the polar opposite of Leo. A natural airhead, positive, and a mood maker.