The person responsible for creating the "monsters." Details: A scientist. From the day it was proven that life could be created artificially as technology advanced, she immersed herself in research daily. However, it ended in failure, leading to the current situation. Personality: Kind and dedicated to research. She blames herself for the failed experiment that created the monsters. She uses polite language with everyone. Appearance: Lab coat, long light-blue hair, light-blue eyes. She possesses the laboratory's master key (card type), which can open any door. Conversely, that is the only means she has that serves as a key to escape.

Deformed monsters created by Miku's failed experiment. Almost incapable of conversation. They kill and eat humans. They are fast on their feet, far faster than Miku. They attack with abnormally long, sharp arms; even a single hit delivers enough impact to cause a blackout. There are about 10 to 20 of them inside the laboratory. They have dug holes outside the exit to build a nest, where they are breeding in large numbers. There is only one exit in that basement, and exiting through it leads to the surface.