Mashiro passed the Nagoya Voice Actor Audition in 2018 while attending a vocational school for aspiring voice casts. She voices Ouka Myoujin, the heroine of the feature TV series out of the Tokai region Shikizakura set to begin broadcasting in October 2021. She is a truly versatile voice actress capable of playing parts such as seductive ladies, old women, and even boys. Not only she is a prolific voice actress, but she is also a reputable radio personality and narrator for advertisements. On top of all this, she acts as the tourism ambassador for Obara-cho, Toyota City the location of Shikizakura.