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?