Nikki Kaelar (born Nicolas Kaelar; May 15, 1990), better known by her stage name Varien, is an American composer, producer, and multi-instrumentalist. Varien has incorporated or experimented with styles of industrial, metal, orchestral, neofolk, and ambient music. She is known for her work on film soundtracks, along with her unconventional approach to electronic music, including many live instruments not normally found on tracks within her genres.