Rainsong holds a DMA in Composition from the Cleveland Institute of Music, where she studied with Margaret Brouwer. Her undergraduate and master's degrees in composition are from Cleveland State University, where she studied with Bain Murray, Edwin London, and Howie Smith. She is a member of ASCAP and the Cleveland Composers Guild.

Rainsong is particularly interested in writing for solo voice, vocal ensembles, and mixed chamber ensembles of voices and instruments, and her vocal music includes numerous pieces that are settings of her own texts. Her catalog of works includes instrumental pieces ranging from solo instruments to full orchestra. Her commissions of both secular and sacred works include many from churches and choral ensembles in Northeast Ohio.

A soprano as well as a composer, Rainsong is an active performer of medieval, Renaissance, and Baroque music as a soloist and a choral musician.

Rainsong is a member of the Music Theory faculty at the Cleveland Institute of Music, where she teaches undergraduate and graduate theory courses. She also is Coordinator of the Doctor of Musical Arts program.

The natural world is an essential part of Rainsong's musical life. She created and maintains a backyard bird sanctuary that has been visited by 86 species of birds. She is a birdwatcher and amateur naturalist, and has earned a Naturalist Certificate from the Cleveland Museum of Natural History