Birthday: July 24 (Leo)
Blood type: AB
A spirit medium with a popular television show and the ability to speak to the dead, Masako is a 16-year-old girl who resembles a Japanese doll because she is always wearing a kimono, even while sleeping. She has romantic feelings toward Naru and is jealous of how casual and free Naru is when dealing with Mai. This initially causes friction between Masako and Mai, as she views Mai as a rival; however, after Mai saves her in the Blood-stained Labyrinth File, they reach a shaky truce.