Azazel

Azazel (アザゼル) is one of the Eight Demon Kings, holding the title King of Spirits (氣の王) and is regarded as the third strongest among the demon kings.

Appearance
Azazel appears as an elderly man with long hair and beard obscuring most of his features. His body has crystallized to the point of becoming completely immobile.

Blue Night Investigation arc
Lewin Light and Ryuji Suguro travel where Azazel is enshrined in order to investigate whether or not the crystallized Demon King was truly on the side of humanity.

Abilities
As one of the Demon Kings, it can be presumed that Azazel was, at least before his returning to nature, a very powerful and influential demon.

He has shown affiliation with Demons such as Ghosts and Byakko.

Trivia

 * Azazel, also spelled Azazael, appears in the Bible in association with the scapegoat rite. In some traditions of Judaism and Christianity, it is the name for a fallen angel.