He is known as The Master.

He is known as Vir Vyber Verfalen.

He is The Antediluvian, and while he isn't ruling the world, he is closer to than he is not.

Born more than six thousand years ago, he was witness to the First Thickening - when writing was invented and used large-scale in Mesopotamia. He got a hold of the Ideal Weapon of The Self during this time, and thus gained a kind of immortality - since he held the Self, he could easily empower his own Imprint, and did so to the degree where he constantly Thickened, and totally overwhelmed any ego he encountered to overtake the body of.

He's crippingly shy, and has a huge dose of agoraphobia.