Most entities are grouped by family relation into pantheons. While we do not often talk about family beyond Bri and myself, we do have a family. Our mother burst onto the scene in a rather dramatic way, which Bri gets into here.
I tend to view our mother as having golden hair, leaf green eyes and bright skin. She likes to wear green and brown, though I could see her in red or pink. She tends to hide her face, sometimes with a veil, sometimes with a mask. She wears a lot of bracelets and sometimes she has a small circlet in her hair. It tends to look like a halo. She is beautiful. There are few entities that actually fill me awe in the proper sense of the word. (Awe: an emotion variously combining dread, veneration, and wonder that is inspired by authority or by the sacred or sublime). Irreverent as I have come across to others in various place, it is her presence that puts what may be considered the proper fear of god into me. And there is a very simple reason for that: generally, she is terrifying.
The most apt description that comes to mind is from Tolkien:
In place of the Dark Lord you will set up a Queen. And I shall not be dark, but beautiful and terrible as the Morning and the Night! Fair as the Sea and the Sun and the Snow upon the Mountain! Dreadful as the Storm and the Lightning! Stronger than the foundations of the earth. All shall love me and despair!
That is her in her full grown aspect. Beautiful and terrible and hard and distant. She is Mistress– the inexorable march of seasons that bring the harvest, dire necessity that dictates fate for all, life and death that cycles on irrespective of the wishes of gods and men.
Because she is so unyielding, my sister and I exist as a buffer between her and the people. We represent her authority and power on a much more approachable scale, a human scale, the scale of a man’s life, the scale of cities and kingdoms. Not the vast, eternal scale of the mountains and the sea and the sky. That is not to say we do not have our own individual attributes or other meanings as a pair, but this is essentially our first function.
Because of her relationship to us and because, historically, many Great Mother-type goddess are also classified as earth goddess, it is tempting to label her as such. I do not think that is entirely accurate. I could easily see her as tied to the stars , especially the sun, which metes out time and is a driving force of life.