Kappei Yamaguchi
While a student at Wako University, Nishihara attended voice acting classes run by Kaneta Kimotsuki. When Kimotsuki established in 1984, Nishihara went on to leave her undergraduate studies unfinished to become a founding member, taking numerous roles as a leading actress in several productions and appearing in the lead role of Alice from "Alice in Wonderland" three times. Theatre Company 21st Century Fox became known for producing numerous voice actors with a theatre background such as Kaneta, Nishihara, and Kappei Yamaguchi. Nishihara took on voice acting roles in anime starting with "Little Memole" and becoming known for major voice acting roles in anime such as "Hello! Lady Lynn", "Sailor Moon Sailor Stars", and "s-CRY-ed", in addition to voice acting roles in a number of Japanese games. Nishihara is known for taking on voice acting roles involving high pitched female voices and a great deal of singing, leading to appearances on the Japanese music variety show "Utaban" aired by the Tokyo Broadcasting Corporation.