Masami Okui is a J-Rock/J-Pop singer who was born in Itami, Hyougo Prefecture. She began her professional musical career at age 21 as a concert backup singer.

From almost the very beginning of her career, Okui has sung themes for TV and movie anime. She is especially well known for her songs from Revolutionary Girl Utena, Slayers, Sorcerer Hunters, Di Gi Charat, Magic User's Club, Jungle de Ikou, Akihabara Dennou Gumi, Ray the Animation, He Is My Master and Yu-Gi-Oh! Duel Monsters.

She has performed material for more than 50 singles and 20 albums to date (including her work with JAM Project and Chihiro Yonekura).

Twitter: @lovelovedragon