Amon is the ancient angel king of the Error path, a thief who has nothing of his own and therefore has everything. A monocle, a polite smile, and a habit of appearing where he was least expected — and earlier than anyone noticed.
Amon steals everything: things, abilities, memories, luck, time itself. His signature is "gifts" that the victim discovers already inside their own destiny, and doppelgängers that even the original doesn't know about.
For Klein Moretti, Amon is the most personal of adversaries: the thief set his sights on the gray fog and its master back when "Mr. Fool" was just a bluff from a terrified transmigrator. Their game lasts the entire novel — and the stakes rise to divine proportions.