User blog comment:Menara/The Mark of Athena Character Art Revealed!/@comment-1515612-20120901164401/@comment-3146930-20120902033353

In mythology, I believe Hercules became the god of strength. Also, he is the doorkeeper of Olympus. Also, even if Poseidon is lord of the sea, that doesn't mean he controls everything in the sea, as there is the god of dolphins and the god of sharks and pretty much anything else. Percy could simply be god of some kind of sea related thing, like the god of whirlpools or possibly the god of hurricanes.