Nijigaoka Mashiro (虹ヶ丘ましろ?) is one of the five main Cures in Hirogaru Sky! Pretty Cure, and a second-year student at Sorashido Academy. She usually lives with her grandmother, as her parents work overseas. Her nickname is Mashiron (ましろん?).
Mashiro transforms into the Pretty Cure of Light, Cure Prism (キュアプリズム?).