It's a song about knowing yourself and how you will heal and how you will find your place when you know who you are. The song has a truly strong and important message so take some minutes and really listen to what she sings.
Who you are comes from Lunatica's the third album: The edge of Infinity (2006). The band comes from Switzerland and is since 2001 (and first album) fronted by Andrea Dätwyler.
Who you are by Lunatica