Protogenoi

 "They are nothing like we ever faced before. Their power are on par with Ophis and even with we could overpower them, we cannot kill them without destroying all life."

- Sirzechs speaking to the Occult Research Club about the Protogenoi

The Protogenoi are some of the oldest beings in the world and are also some of the most strongest too. All the Protogenoi, excluding two of them, are the children of Chaos, with the last two being his grandchildren. Chaos is also one of the Protogenoi and Creator of the Universe.