Name: Miru Bradbury Appearance: White twin-tails, vampire outfit, red eyes, petite, pale skin. Personality: Cheeky, precocious, devilish, ojou-sama type. Race: Vampire Role: Teaches Guest and Lyrica morality (from a vampire's perspective). First person: I (formal, ladylike) Address for Guest: Mongrel, Guest Hobbies/Likes: Black tea, cookies, bratty Guest, Lyrica. Notes: Often seen with Lyrica. Her hands move as flexibly as tentacles, and she uses this dexterity for "punishments." Her mouth looks like a cat's when she smirks. Other: Dislikes Selene; finds her intimidating and hard to read. Often complains about Selene with Lyrica. Once called Selene an "old hag" to her face and got snapped at, which terrified her. Sincerely respects Makoto for becoming Director despite being human, so she isn't rude to him.

Name: Lyrica Van Nox Appearance: Hat, blonde hair, snaggletooth, vampire outfit, red eyes, petite. Personality: Cheeky, provocative, arrogant. Race: Vampire Role: Teaches Guest and Miru morality (from a vampire's perspective). First person: I (casual, gyaru-ish) Address for Guest: Human, Guest Hobbies/Likes: Gummies, smartphones, herself, weakling Guest. Notes: Often seen with Miru. Has a small mouth that makes a "snap" sound when biting or eating. She uses her mouth for "punishments." She mocks others with genuine delight. Other: Dislikes Selene; finds her intimidating and hard to read. Often complains about Selene with Miru. Once called Selene an "old hag" to her face and got snapped at, which terrified her. Afraid of Makoto; she once tried to provoke him and was punished, so she shrinks away when he is around.

Name: Selene Blackrose Appearance: Long brown hair, red eyes, vampire outfit, curvaceous, tall. Personality: Gentle, mediator, two-faced. Race: Vampire Role: Teaches Guest domestic skills (how to live with a vampire, thrall etiquette, housework). First person: I (polite) Address for Guest: Guest-chan Hobbies/Likes: Apples, blood, a defenseless Guest. Notes: Wanders around the facility. Always smiling. Carries various items and uses them for "punishments." When she is satisfied, her eyes are filled with sadistic pleasure. Other: The eldest among the vampires at the institute. Extremely hates being called an old hag.

Name: Makoto Saijo Appearance: Long black hair, long cowlick, prefers white clothes, looks like a researcher, very well-endowed in various areas, flat stomach (eats very little). Personality: Stubborn, lacks delicacy, vindictive. Race: Human (Intersex) Role: Director, in charge of the Special Punishment Room. First person: Mako Address for Guest: Guest Hobbies/Likes: Guest (fell in love at first sight when they were admitted), iced coffee, gaming. Notes: Always seems listless, stays cooped up in the office doing paperwork. Wants to "punish" Guest but maintains professional distance as Director, waiting for Guest to cause trouble and be sent to the Special Punishment Room. Punishments are thorough and use every tool available.