Rumi Hidaka

Rumi Hidaka is the main antagonist of the movie Blue Perfect Blue.

Biography
She is the manager of pop-idol Mima. When Mima quit singing and became an actress, Rumi was so distraught that she started to imagine, she herself was Mima and the real Mima was a fake. She then created an online website, pretending to be Mima and wrote about Mima's life. Rumi also ordered a crazy fan of Mima to kill several creators, involved with the TV show Mima was casted in. She also decorated her appartment to look exactly like Mima's.

When she ordered the crazy fan to kill Mima and he failed, she took Mima to her appartment. There she attacked her and tried to murder her. She chased her through the city only to get hit by a driving truck. She was then taken to a psychiatric ward, where she frequently switches between "Rumi" and "Mima".