A group of fallen angels described in the bible as one's who mated with mortal women.
The Grigori (from Greek egrgoroi, “The Watchers”) are a group of fallen angels (200) who mated with mortal women, giving rise to a race of hybrids known as the Nephilim, who are described as giants in Genesis.
“These are the names of their chiefs: Samyaza, who was their leader, Urakabarameel, Akibeel, Tamiel, Ramuel, Danel, Azkeel, Saraknyal, Asael, Armers, Batraal, Anane, Zavebe, Samsaveel, Ertael, Turel, Yomyael, Azazyel (also known as Azazel). These were the prefects of the two hundred angels, and the remainder were all with them.”
The Watchers where angels apparently dispatched to Earth simply to watch over the people. They soon begin to lust for the human women they see, and at the prodding of their leader Samyaza, they defect en masse to marry and live among men. The children produced by these relationships are the Nephilim, savage giants who pillage the earth and endanger humanity. Samyaza, Azazel, and the others become corrupt, and teach their human hosts to make metal weapons, cosmetics, and other necessities of civilization that had been kept secret. But the people are dying and cry to the heavens for help. God sends the Great Flood to rid the earth of the Nephilim, but sends Uriel to warn Noah so as not to eradicate the human race. The Grigori are bound “in the valleys of the Earth” until Judgment Day.
In today’s time there a whispers that some Nephilim have survived the flood and have since flourished, hidden within humanity. They are creatures that possess greater powers not that of Angels or demons but lesser of the two. Legend has it that one will rise above their ranks with powers greater then any have possessed. One that will bring peace among the Angels and demons, to quiet both Heaven and Hell. To make whole what was once broken. To bring peace to Earth once and for all.