深田 律子

The main character's female friend, a mad pharmacist who frequents the university's lab. She is the developer of the hypnotic drug.

She works as a waitress to help out her friend and offers up her own body to better understand the effects of the drug she created.

Although Ritsuko is a beautiful woman, she has no interest in anything other than her research and has seemingly discarded her

Of course, this lead to her having no sense of shame when around the main character. It's also difficult to discern what is she is thinking as she always has something else on her mind.

However, when she's lucid, she can become a very seductive woman who exudes pheromones.