Mavda is of the Vestra tribe and is a mysterious old lady who carries her husband around on her back. She takes Aeron and Elena to the Observatory to escape the Elyrian army who are searching for them. On the way she tells them of the Beast's Curse which has befallen Elena. At the Observatory she tells them of the only cure and gives Aeron the Oraclos Chain, a tool of her people.
She later reveals that her job is to bring the cursed ones to the Observatory, where they could either be saved or otherwise finally transform into a Master for a Tower.