What is the name of the girl who sings the duets in the album The Emptiness by Alesana?

There's a girl who does a duet with the lead singer of Alesana and she's not in the band. She says "The emptiness will haunt you" in the beginning of The Curse of the Virgin Canvas and sings in Hymn for the Shameless. What's her first and last name/ the name she goes by?