Not many spirits dare enter my Sanctuary, though I have to say you are quite fascinating. Though you did ask me a question so I should probably give you an answer hmm~?
My Aura may be ‘Pure’ to you simply because your very soul understands that I could unmake it in an instant. But that is besides the point.
I have not heard the term ‘Tochigami’ in quite some time... While I am curious as to how you know of them, you are correct: I am not a Tochigami. Nor am I simply a regular ‘Kami’.
I am the Original Mother and Creator of Gods: Rhea. In all honesty I do not have much to do other than watch over this world that my Children created, though I do guard a portal to the Torn World as I no longer have a Son who guards it. That task was given to the child of another, so I have not seen fit to hatch a new egg.
Though as of recent months I have tasked Gwenivyre with watching the portal. She is more than strong enough to keep it closed after consuming one of my Children of the Lakes. So I guess I could say this Kami has no purpose other than making sure my Children stay on the correct Path.