Cain (Supernatural)

"Abel was not talking to God. He was talking to [[Lucifer (Supernatural)|Lucifer|Cain|undefined"

Cain, the first murderer, is an antagonist in the CW show Supernatural.

Biography
Cain and his brother Abel were the sons of Adam and Eve and the direct ancestors of Sam and Dean. Cain loved his brother deeply and one day found him talking to some unseen force. Abel claimed it was God, but Cain had doubts and through investigation, found his brother was talking with Lucifer, the Devil, who sought to corrupt Abel.

Cain did a deal with the Devil that if he freed Abel and put his own soul in Abel's place, could Abel go to Heaven. Lucifer slyly agreed, but added the catch was that Cain had to kill Abel to get Abel to Heaven. So, Cain took his brother to the field and killed him, marking his legacy as a killer and the first murderer.

All future humans believed Cain to be pure evil and nothing less than a demon. But although Cain did become a demon when he died, Cain was in fact helping Abel from eternal fire.

Modern day
In Hell, Cain become master of the Knights of Hell, including Abaddon, and Cain reared them in the arts of murder. He also presumably trained Alastair the torturer.

Cain returned to Earth in modern times and he set out hunting demons. He was still remorseful about his brother's fate and wanted to be human again. Cain killed many demons, so much that the others feared him as a bogeyman. Cain eventually met a woman named Collete, who he explained he was a demon, the Biblical Cain and the first killer but said he had saved his brother from Lucifer. Collete forgave him for all his sins and asked him not to kill again and he agreed.

One day, demons kidnapped Collete and had Abaddon possess her. Abaddon taunted Cain about his failures and humanity and in rage he stabbed her, but she had vanished long before and Cain killed his own wife. But before she died he apologized and told her he would never mix with demons.

Sam and Dean then met Cain at a beehive farm in and he gave Dean the First Blade which would kill Abaddon. Dean also received the Mark of Cain, which Cain got from Lucifer. This Mark was a brand which, upon its hosts death, resurrected them as demons but also gave them super-strength, wrathful rage and super-stamina when alive.

When Dean set out to kill Abaddon, Cain asked Dean to kill him when he had finished because he was tired of immortality.

Cain returned many centuries later as