Aredhel Ar-Feiniel

It is a portrayal of Aredhel Ar-Feiniel, Eol's wife and Maeglin's mother.

Aredhel Ar-Feiniel, the White Lady of the Noldor, daughter of Fingolfin, dwelt in Nevrast with Turgon her brother, and she went with him to the HiddenKingdom. But she wearied of the guarded city of Gondolin, desiring ever the longer the more to ride again in the wide lands and to walk in the forests, as had been her wont in Valinor: and when two hundred years had passed since Gondolin was full-wrought, she spoke to Turgon and asked leave to depart. (JRR Tolkien, Silmarillion).

As for this picture, Aredhel is represented here in Gondolin, before her trip from which she will return in many and many years.