|Oh dear... That's not very good.|
Mamoru Uchida (or Me-Mania, as he is predominantly known as in the film) is the secondary antagonist of Perfect Blue. He has an obsession with Mima. He often frightens people because of his appearance and the presence he gives off. Several people have often referred to him as either a freak or a weirdo.
When Mima announced her career change, he began to stalk her and send her threatening letters, including one with a small explosive that injured Mima's agent, Tadokoro.
During the course of the movie, his lust for Mima takes control and he eventually buys every adult magazine that features her or her nude photos. His work space is set up with every Mima-related merchandise he has on the walls. His obsession is further driven when he receives emails from who he believed to the "Real Mima", saying he's the only she can rely on (but in reality, it is really Rumi Hidaka, using him as a scapegoat). The ugliest thing I never saw
Near the end of the film, he was eventually convinced that the actual Mima is an imposter, therefore taking it upon himself to "protect the real Mima" and remove the obstacle (this is the only time in the movie when/where he speaks, which comes off as crude and psychotic). He then proceeds to attack Mima and attempts to rape her. Luckily, she grabs a nearby hammer and hits him on the side of his skull, knocking him unconscious. When proven useless and no longer needed, Rumi later killed him like the other victims. His body is last seen beside Tadokoro's body.