Amosia

A red skinned, golden eyed tiefling woman that the party first saw in the strange vision-like encounter in the Eberron underdark in Arc 2, Session 23.  Vita described her as an old friend from Faerun that had betrayed her; leading to her banishment from her home Mt. Celestia.  
Encountered by the entire party in the flesh in Art 3, Session 4 in the wastelands of The Doomed Moon, Syke, she appears to have found her way out of her old home.