Azazel (アザゼル), also known as the Yellow Eyed Demon, The Demon, and The Devil, was the main antagonist of Supernatural: The Anime Series, an animated Japanese remake of the first two seasons of the original TV series.
Azazel was a powerful demon and a Prince of Hell who served Lucifer. Until Sin City, Azazel's name was not revealed and he was referred to by nicknames such as The Demon, The Yellow-Eyed Demon, or Yellow Eyes.
Azazel was a powerful, elite-ranking demon, and the sworn enemy of the Winchester family for killing Mary Winchester. He was called the Yellow-Eyed Demon (or Yellow-Eyes, or simply the Demon, before his real name became known), because he uniquely possessed swirling bright yellow demon-eyes.
Azazel, also known as the Yellow-Eyed Demon, is the tyrannical ruler of the demons in the TV series Supernatural, and the main antagonist for the first two seasons. He was portrayed by Fredric Lehne in most of his appearances, by Rob LaBalle in a flashback in Season 4...