Nyssa

Banshees are traditionally creatures from Irish Mythology. They are described as wailing ghosts. Nyssa is special because she does hold the attributes of the traditional banshee with the white hair and red eyes, she is not undead. It is unclear if her nieces are infact undead or if they are living but Nyssa protects them from any and all danger as a mother would. Her sister, the mother of the children, is shown as being dead therefore, it is safe to assume she was destroyed by iron or gold and will remain completely dead. How Nyssa can be a banshee and still live is a mystery that she may recount at some point. Perhaps it is a curse or a gift from another creature. Nyssa is inherently good even though she is feared, she was captured and dropped off on an island far away, as an outcast of civilization.