|“||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. Several of them are major antagonists of the upcoming fanfiction story "The Magic God"
The strength of the Protogenoi is said to be immesurable, on the same level as Ophis, the Infinite Dragon God. Even Shiva, a powerful god, commented that he doubt he could defeat one of them. Michael explained that Ouranos, the Protogenoi of the Sky and Heaven, was the original ruler of Heaven and only after his defeat at the hand of his son, Kronos, was God of the Bible and the Angels able to claim Heaven as their home. Tartarus, the Protogenoi of the Abyss, easily defeated Hades, one of the "Top 10 Strongest Beings in the World" and his powers are so great that the Original Satan created a barrier around the Devil's territory with his own life force to protect his people from Tartarus' wrath.
The major factor that separates the Protogenoi from other deities is that they each represent a fabric of the universe and thus cannot die. Azazel even said that if they were to die, their deaths would cause the end of the world. However, Merlin reveals that its impossible for them to die in the first place, that only their physical form would be destroyed and their conscious scattered across the Ether, just like what happened to Ouranos. Along with being the manifestation of their respective areas, the Protogenoi can also manipulate what they embody too, such as Gaia being able to control the Earth.