God (metaphysical)

God is often conceived as the Supreme Being and principal object of faith. God has been mentioned in the two series. First by Chiron in The Lightning Thief, then by Leo Valdez in The House of Hades.

The Lightning Thief
Chiron specifically differentiates God from the gods, and says that the gods are quite a smaller matter, but that they shall not deal with the metaphysical.

The House of Hades
Leo mentions that God could be the one who created the Earth, stating that every machine needs a creator.