Ellorna

Ellorna is the adoptive sister of Elanathreal Vilia, she was originally the heir to the kingdom, but she was sent away to a monastery close the the borde with The Balan Caliphate upon Elanathreal being born. 
Part of entering this monastery involved taking an oath that rejected all claim to the throne and swearing away her heritage. This could only be undone by the king, which the dark spirit that took control of her planned to do. Luckily the party twarted it in its plans and left Ellorna very confused and with her last memory being very long ago.