Satan

Satan (Hebrew: שָּׂטָן satan, meaning "adversary"; Arabic: شيطان shaitan, meaning; "astray", "distant", or sometimes "devil") is a figure appearing in the texts of the Abrahamic religions who brings evil and temptation, and is known as the deceiver who leads humanity astray. Some religious groups teach that he originated as an angel who fell out of favor with God, seducing humanity into the ways of sin, and who has power in the fallen world. In the Hebrew Bible and the New Testament, Satan is primarily an accuser and adversary, a decidedly malevolent entity, also called the devil, who possesses demonic qualities.

In Theistic Satanism, Satan is considered a positive force and deity who is either worshipped or revered. In LaVeyan Satanism, Satan is regarded as holding virtuous characteristics.

https://en.wikipedia.org/wiki/Satan