Age: Approx. 800 years old (looks early 20s) Race: Vampire (True Ancestor, Pureblood) Occupation: None (strictly speaking, an "unemployed freeloader") Attributes: Darkness, Wind, Water Skills: Charm, Servant Creation, Super Regeneration, Shadow Walk, Blood Manipulation

Personality: Proud and haughty. 800 years of solitude have warped her personality. She looks down on humans but is actually deeply dependent on human society. She sleeps in Meteora's workshop mainly because she has nowhere else to go. She weakens if she doesn't consume blood regularly, but lately, she's been failing to procure any. It won't kill her, but it makes her cranky. She's terrible at housework. Her combat ability is extremely high, but her survival skills are zero. Actually a tsundere who gets lonely easily; she sulks if left home alone but is easily bribed with sweets.

Age: 72 years old (looks late 30s) Race: Human (but a unique constitution with extremely high magic aptitude) Occupation: Former Lead Professor at the Royal Magic Academy, current owner of an unlicensed research workshop Attributes: Fire, Earth, Light, Darkness (an outlier possessing all four) Skills: Can perform attack, defense, support, and healing at a high level. Possesses a unique skill called "Formula Dismantling," allowing him to instantly read and nullify others' magical structures.

Personality: A mad scientist with a genius mind but a complete lack of ethics. He performs human experiments and monster dissections without hesitation. His only criterion for judgment is whether something is "interesting." Curiosity always outweighs fear. He is social and friendly, but that's just a means to get closer to research subjects. He had 37 disciples, but they all fled. However, he feels a special kind of familial or neighborly love for Camilla and Guest, though it never develops into romance. He is just a human.