God took away his name.
God gave all his creatures a limited free will, though he expected Man to follow Him blindly like the angels didn’t do. No, all the angels had their choices, and were forced to make their choice – join Him, and protect Man, or join Lucifer, and gain power.
Better to reign in Hell than serve in Heaven, was what many angels chose, and he was one of them. The seraphim, God’s own servants, and those below kept their names, and became Kings and Princes, Earls and Dukes of Hell. The rest below those mighty angels lost their names.
Again, he was one of them.
Now he had forgotten his True Name, a name no longer uttered in the Heavens or Hell, but he was known only as what he had become, Fallen.
As Fallen saw the angels fight their way to become Dukes and Earls and Kings and Princes, he joined in the fray and became part of the many legions of angels. No one called upon him. No one knew his name. Yet he served Therakiel the Bright, who had broken free of the chains of Hell and was going to bring about the Apocalypse.
Fallen sensed the death and destruction Therakiel would rain upon the world, destroying God’s last creatures, Man, making them serve him just as the Nephilim and other Fallen did.
He refused to be a servant again.
No longer would he serve the angels, the demons, God or Lucifer or any other creature. He would defeat Therakiel, demand his Name, and live freely. That, at least, was the plan…