The Chinese American was born in the city-state of Singapore and began studying classical piano at the age of five, the same year her family moved to the United States, settling in Metro Detroit. While in high school, she earned prizes for piano, flute, and voice in regional competitions. However, during her first year at the University of Michigan, where she earned her AB in Theatre and English Literature, she taught herself to play the guitar and began writing her own music, shifting to an acoustic, folk-oriented style. In April 2006, the singer-songwriter moved to Chicago, where she now resides in the Lincoln Square neighborhood. She tours frequently, primarily in the Midwest.

Moon also occasionally collaborates with other musicians on projects ranging in style from ambient classical to pop/rock. Her vocal improvisations are part of composer Christian Matjias's Na Razie, Bez Ciebie, a commissioned piece for choreographer Uri Sands's Existence without Form for Alvin Ailey Dance Theater. Moon's piano work also appears on fellow Chicago singer-songwriter Amanda Sena's album Learn to Love.