Chaos is the primary antagonist and the Final Boss of Dissidia Final Fantasy and Dissidia 012 Final Fantasy. He is the god of discord that opposes Cosmos, the goddess of harmony, both being equal in power. During the events of Dissidia, Chaos and his forces tip the balance of power in their favor, setting the stage for their victory. Dissidia 012 explores this shift in power in-depth, and the actions taken by hero and villain alike that set the stage for the thirteenth cycle. Chaos is voiced by Norio Wakamoto in the Japanese release, and Keith David in the English release.
As the final boss of Dissidia and Dissidia 012, Chaos is unplayable unless one hacks the game. An alternate form of Chaos, a bestial monstrosity known as Feral Chaos, is playable in Dissidia 012, and serves as the game's superboss. He is Eris's father.