The universe Mother, the most powerful being of the UV universe.
And it's not even in it.
It's more of a sexless being with a universe for a head.
No one is sure where it dwells, maybe it's forever wandering a vast plane, maybe it lives on a planet inhabited by such beings.
Maybe it's not a real being and just something every single living thing in the universe thought of and believes in.
I really like how the anatomy for this turned out.