Kayama Ayumi

A skilled pharmaceutical engineer who has developed many drugs.

At first glance, she appears to be a friendly and good-natured person, but she is actually a Mad Scientist who will choose any means to achieve her goal. Addicted to experiments, she is even willing to use herself as an experimental material​.

Seeing the protagonist's healthy body, she plans to make him her next specimen. When experimenting, she becomes ruthless​ and inhuman, other than that, she also uses words and actions like she is spoiling her subject, raising the disposition of a psychopath​.

Her sexual acts that were performed out of curiosity at first have also gradually become more abnormal.