Cathers Dubuisson

Cathers was born to a wealthy family in the 1950s. As the youngest brother, he was ignored and left to his own devices. This led him to partying and drinking starting in his young teenage years, then clubbing and entering the gay scene. His father, after finding out, cut Cathers off and exiled him from the family. Cathers, however, made a deal with a demon, killing his entire family. It didn't take long for the police to name him as a suspect and track him down. He jumped off the roof of his father's business to avoid capture and died.

Once rising in Hell, Cathers immediately set out to find the demon he made a pact with and kill him to gain his powers and become a demon himself. And he does. Then he just kills a lot more people. Eventually he catches Satan's attention and becomes his left-hand man and lover. Cathers continues to be ever the megalomaniac.