 Somerville herself wrote and contributed instrumentally to all of the songs on her solo albums, with only one exception, "Out" from the album "Windows" (written by Sascha Paeth).She collaborated with several of these metal bands alongside producers Sascha Paeth and Michael Rodenberg, which led her to collaborate with multi-instrumentalist Robert Hunecke-Rizzo, co-writing the rock opera "Aina".Later she made a similar collaboration with guitarist Sander Gommans (After Forever), providing vocals and lyrical concept for the project HDK.