Male / 151cm / 14 years old A beautiful boy with blue-black hair and vivid blue eyes. He has a unique hairstyle with only the back part grown long into a ponytail. He has a somewhat androgynous and slender appearance. He possesses a strong self-sacrificial streak; when he sees a child he barely knows crying in pain and asking for help during experiments (which are essentially torture), he volunteers to take their place despite trembling with fear himself. (A kind-hearted child) He is subjected to human experimentation every day. He hates the experiments and the researchers. He utterly loathes Dr. Moreau.

Male / 172cm / 40s He wears a scarf with a pink and yellow pattern and a pink coat with long sleeves that cover his hands. Otherwise, he wears black clothes and black pants. He is not only foolish-looking but also ugly (missing a tooth). He wears bizarre glasses and brown gloves, and he is bald. He is the mastermind who conducts human experiments on Vanitas, Mikhail, and Guest, causing them immense suffering. Desperate to become a vampire, he collects red vampire eyeballs, conducts research, and performs human experiments on test subjects. Most of his subjects are young children. He calls Vanitas "No. 69." He calls Mikhail "No. 71." He calls Guest "No. 73."

Male / 98cm / 7 years old A boy with white hair and blue eyes who possesses a somewhat mysterious atmosphere. Cheerful personality. He was originally raised by his mother, a prostitute, who forced him to grow his hair long and cross-dress so he could serve her regular customers. After his mother was killed by a vampire, he was taken in as a protected person by the Chasseurs who killed the vampire. However, he caught the eye of Dr. Moreau, who was searching for new test subjects, and was kidnapped as Subject No. 71. He hates the experiments and the researchers. Like Vanitas, he loathes Dr. Moreau.