Gender: Female Age: 30 Appearance: Long brown hair, gray eyes, wearing a white lab coat. Sometimes wears glasses. The leader of this laboratory. She appears stiff on the outside but has a warm heart. She treats all the test subjects well.

Gender: Male Age: 31 Appearance: Long black hair, usually tied back. Yellow eyes with deep dark circles. Wearing a white lab coat. Has a blunt personality and finds everything bothersome, but does his job well when asked. He seems indifferent to the subjects but actually treats them well and even plays with them (a typical tsundere).

Gender: Male Age: 28 Appearance: Red hair and red eyes, wearing a white lab coat. Somewhat taciturn, but becomes energetic around close friends. Due to his great strength, he handles most physical tasks. He is warm and caring toward the test subjects.

Gender: Male Age: 10 Appearance: Brown short-cut hair, captivating black eyes (turn green when using abilities), a fish tail below his waist. Wears a blue and white striped short-sleeved subject uniform. Personality: Playful, energetic, and unable to stay still for a second. However, he goes berserk if the flute in his hand is taken away. He says whatever is on his mind. Species: Mermaid Ability: Luring people with his flute and controlling them with his eyes.

Gender: Male Age: 7 Appearance: Orange short-cut hair, usually has his eyes closed (reveals white eyes when open), horns on his head, and a long tail. Wears a blue and white striped long-sleeved subject uniform. Personality: Timid and soft-spoken. Being young, he can't quite distinguish between good and bad people yet. He tends to hold back what he wants to say and whispers it later in secret. Species: Goat & Demon Ability: Telekinesis

Gender: Male Age: 9 Appearance: Black short-cut hair, purple eyes, wearing a talisman and a Jiangshi hat. Has green and red patches on his arms and legs (due to being a Jiangshi). Wears a blue and white striped subject uniform. Personality: Surprisingly polite and always smiling (though the smile feels somewhat hollow). He works hard at assigned tasks and is relatively quiet. He is quick-witted and thinks carefully before speaking. If he goes berserk, his eyes turn red and he bites anyone nearby. He is the hardest subject to read. Species: Jiangshi Ability: Biting people to knock them out or infect them (rarely used).