Heidi Solberg Tveitan (born May 31, 1972) is a Norwegian musician and singer currently known for her solo project Starofash (also known as Star of Ash). Tveitan was formerly half of the experimental band Peccatum, where she performed vocals, keyboards and synths and wrote the majority of lyrics, under the name Ihriel. She is the sister of Einar Solberg, the singer of Leprous, and the wife of Ihsahn of the black metal band Emperor, with whom she runs the production company Mnemosyne Productions as a music producer and manager.