Mitsuru is a young male prostitute in the film Zero Woman: The Accused. He is introduced when Rei, an undercover agent for the Zero Department, encounters him at a gay bar where he is seeking clients. After witnessing him being severely beaten by a group of street thugs, Rei makes the uncharacteristic decision to take him into her home to recover. This act of kindness leads to an unlikely friendship between the two. Mitsuru's background is that of a troubled individual working in the sex trade, and he appears vulnerable and isolated. His motivations are not explicitly stated early in the story, but as the plot unfolds, it becomes suspected that he may be the person responsible for a series of vicious murders of men. The narrative suggests that these killings could be acts of revenge against those who have abused him. In the story, Mitsuru serves as both a companion to Rei and a primary suspect in the murder investigation. His relationship with Rei is central: she feels a protective instinct toward him, yet her professional duty forces her to question his involvement in the crimes. Over the course of the film, Mitsuru's behavior grows increasingly suspicious, leading to a tense dynamic. His notable abilities, if he is indeed the murderer, include a capacity for violence and possibly a skill in disguise, as one description notes he likes to kill men while dressed in drag. The character's development revolves around the ambiguity of his innocence or guilt, and his ultimate fate is tied to Rei's choice between her duty and her loyalty to him.