Nanjou Yoshino was born on July 12, 1984 in Shizuoka Prefecture, Japan. She has a younger brother. She graduated from RAMS Professional Education, Yoyogi Animation School on October 1, 2007 and on November 1 was transferred to DWANGO Artist Production. She began her music career in 2009 when she replaced Nao as the lead vocalist of fripSide, attracting attention in the industry for her role in the song and PV "only my railgun", the opening theme of Toaru Kagaku no Railgun. She owns two cats, named Mugi and Chibi. She is an indoor person and enjoys games, often mentioning staying up late in order to play them.