 Apollo, in the mortal form of Lester Papadopoulos, serves as the main protagonist of "The Trials of Apollo" series.In "The Heroes of Olympus", Apollo's Roman descendant Octavian promises the god many things for blessing his prophetic skills, which leads to the Olympians' distraction from the true threat of Gaia, and to the resurgence of Python.As a result, the Delphic Oracle ceases to function, effectively halting demigod quests, and Zeus punishes Apollo.