Jael (Supernatural)

Jael is a crossroads demon and the main antagonist of the episode Celebrating The Life of Asa Fox.

Personality
Jael is a cruel and sadistic demon, and his acts of killing were performed by a sense of joy and pride. He enjoyed killing people both physically and psychologically, often targeting those important to his enemies. He also enjoyed revealing secrets from others to create a breach or a fight just to hurt those involved.

Jael was possessive too, because he was furious when Becky killed Asa, not himself. And with that Jael reacted killing some hunters in its wake. And after exposing Becky's secret, he was furious when the hunters managed to exorcise.

Trivia

 * The rivalry of Jael and Asa Fox is very similar to the rivalry between Eto Yoshimura and Kishou Arima, since a human fared superior in a naked fight between a supernatural being at least more than once.