According to the Bible and other biblical texts, Hell brims with fallen angels who turned into demons, and some have stories as detailed as well-known religious figures. Among those fallen is Azazel.
Formerly one of God's favorite celestial beings, Azazel decided to rebel alongside Satan and spread evil throughout humanity. As a result, archangels bound his hands and feet and condemned him to a lifetime of misery. Azazel facts describe his association with goats - specifically, the scapegoat - and the Devil. The worst traits of man have roots tracing back to Azazel, making him a destructive figure akin to Abaddon the Destroyer, especially when it comes to terrifying biblical figures.
After his banishment from Heaven, Azazel was one of the causes of the biblical flood. In the first Book of Enoch, he led humans into sin, so God instructed the archangels to punish them. Uriel was to warn Noah about the flood, while Raphael received specific instructions to deal with Azazel:
Bind Azazel hand and foot, and cast him into the darkness: and make an opening in the desert, which is in Dudael, and cast him therein. And place upon him rough and jagged rocks, and cover him with darkness, and let him abide there forever, and cover his face that he may not see light.
Azazel is so evil anything associated with him is hellish. His name is synonymous with Hell, or Gehenna in the Jewish tradition. Azazel has close ties to the desert - there's a namesake valley in Israel.
But most significantly, Azazel relates to having to spend eternity in the hot, dark pits of Hell.
One text, a Slavic version of the Book of Enoch, said Azazel was an impure bird - a fallen angel "soiled" by his sin. In the Apocalypse of Abraham, Azazel was a snake with human hands and feet, as well as 12 wings.
He closely associates with the serpent in the Garden of Eden who tempted Eve. But Azazel usually appears as a goat - a scapegoat. Dedicated to Azazel and sometimes turned loose, scapegoats symbolically carried the burden of others' sins.
The non-biblical, apocalyptic Book of Enoch details the rise of a group of angels called the Watchers, including Azazel. In Aramaic, the Watchers became known as 'iyrin, which means "the awake/woken up ones."
These special angels were some of God's favorites. The Watchers had to keep an eye on humans and ensure they stayed out of trouble. But Azazel and company started to do more than watch.