Olivia Lufkin professionally known as OLIVIA, is a Japanese American bilingual singer-songwriter. She is the daughter of an American father and a Japanese mother. Her two younger siblings are Jeffrey Lufkin, who is a musician she collaborates regularly with and Caroline Lufkin, who is an independent musician. Lufkin began her solo career after being in the Japanese girl group D&D. She gained mainstream success in 2006 after creating songs for the fictional band Trapnest under the alias of Olivia Inspi' Reira (Trapnest), and the songs were used for the popular anime adaptation of Nana. She was personally asked by mangaka Ai Yazawa to be the singing voice of Reira.

She is married to a musician, Owen Vallis and had her first son, Atlas in 2014.