Gods

The Gods is the term referring to the collective human consciousness throughout the Code Geass Universe. Due to the human nature of not being equal, the consciousnesses are in conflict with each other. Because of this, Charles Di Britannia, Marianne Vi Britannia, C.C. and V.V. formed a contract with each other destroy the gods, and is using the Sword of Akasha to that end.

Originally, references to the gods were considered some sort of metaphor by people such as Cornelia, but that has become less likely as the show progresses. It is later revealed that they are a collective consciousness of all humans beings metemsychosed into the World of C. Charles intended to use the Sword of Akasha to trigger Ragnarök, that would destroy the gods and reform them as single consciousness. Lelouch, realizing that such a world would be stagnant, denies their attempt to create a new world. He used his Geass to influence the gods to turn against his parents and destroy them, thwarting Ragnarök from occurring.