Samyaza, whose name can be roughly translated as "The Infamous Rebellion" is a powerful Fallen Angel from Christian texts. He was said to be one of the leaders of the Watchers, a group of angels who rebelled against God's will and mated with humanity while also providing them with forbidden knowledge.
Samyaza was said to be wicked to the extent that he has often been argued to be an alter-ego of Satan while others claimed it's another name for Satan. However some scholars believe it is important to separate the two, believing that although similiar the two are completely different supernatural beings. Satan chose to be cast out while Samyaza was tasked to decend to the Earth and watch over the humans.
Samyaza is said, by some, to be one of the few beings in creation that knows God's true name and once offered to bestow knowledge of it to the human woman Istahar. This special knowledge has earned him his other title of "He Sees the Name".
Although powerful, Samyaza would be punished, like all of his associates, by a wrathful God after they taught humanity the secrets of war and mating with human females to produce the demonic giants known as the Nephilim being banished to the valleys of the earth until the Day Of Judgement.