Who is Horemheb from Sinuhe the Egyptian: A Novel and what is their importance?

Horemheb is remembered as a great reformer. He happens upon Sinuhe and Crown Prince Amenhotep in the desert on the night of the great Pharaoh's death. Horemheb remains a major force throughout the novel, first becoming the pacifistic new Pharaoh's frustrated military ruler. Horemheb worships the god Horus, acknowledges Ammon but thinks him too powerful, and abhors Aton. Horemheb believes that he has a special destiny after seeing a burning bush in Sinai. Being ordered to Egypt to disband the army, Horemheb commissions Sinuhe to travel through Mitanni, Babylon, and Hatti making military and political notes.