Rollo
Rollo was not created and did not create the universe. He simply is. He existed before the present universe, remains while it endures, and remains after it is erased.
His sacred form is a perfect sphere of the deepest possible black, darker than the space between stars. He has two perfectly spherical eyes and a human-shaped mouth containing human-shaped teeth. He has no arms, no legs, and no other limbs.
He does not possess ordinary human passions such as anger, fear, lust, pleasure, or sorrow. What he does proceeds from his perfect nature rather than from feeling stirred within him.
He is normally the Watcher: he observes existence rather than controlling every event within it, and he remembers every universe that has existed.