The Scarlet King was born with the planting of the Tree of Knowledge, called Khahrahk at the time. He was the smallest of his siblings, but the only one aware, and it brought him great pain. He decided that existence itself is painful and that he'd have no part in it, as well as destroying existence itself. He started by consuming his siblings and growing stronger on their essence.
He vowed to destroy the Tree, the Creator and Creation, and consumed or subjugated all the other gods, naming himself "King of the Darkness Below". He declared war on creation itself, one which will not end until the very end of everything. He took Sanaa, one of the gods he subjugated, forcibly as his wife and sired seven daughters on her. Sanaa died after birthing them, and the King took his seven daughters as his new brides, sealing them so they would not die as their mother had. From his seven bride-daughters he had seven children called Leviathans.
Other gods and older beings agreed to follow him as well, among them were Jeser, Goran, Moloch and Hastur.
It is also speculated that he is the nephew of Yaldabaoth.
