Ai Imari (伊万里 愛 Imari Ai), also known as Maria, is a mysterious researcher who seemed to have knowledge about the Pupa virus and is currently doing experiments regarding it. Maria has butt-length black hair that has a small hair strand swept to the left side, brown eyes and a a scar on the right side of her body. She always wears a long black dress and a black hat.   Maria does not seem to care much for almost anyone or anything, treating everything like guinea pigs and test subjects 