|★ Resident of fantasy that runs through time ... Chiyuri Kitashirakawa
A girl with a somewhat odd way with words. She's Yumemi's rather outspoken assistant; she seems to be able to speak frankly with her. She may look immature, but she's 15 (probably immature). She left graduate school and works as an assistant at a university. (In this world, you graduate from college at 11, and leave graduate school at 13.) She's specializing in comparative physics, so she's obviously pretty sharp.
Right now her primary tasks are things like organizing the data Yumemi collects.