Servant of the Devil.
As a servant of his Lord Lucifer, he is undeniably loyal. He'll do anything for him regardless of the consequences. As an individual, he likes to be kept entertained and will do whatever he can to be satisfied. Quite frankly, he thinks humans are utterly weak and useless, and angels are hardly worth the bother. But if his Lord and Master wants something to do with them, he'll put aside his personal feelings for the Devil's sake. He's not shy at all about how he looks and likes to take advantage of how humans treat each other like a piece of meat. Not only is he in this to please Lucifer, he's doing it to have some sick and twisted fun for himself. And he'll take anyone for a ride.
He has the devil's mark:
Place of Marking: On his left shoulder blade
Other: Call him whatever the hell you like, but he'll take what he can get when he can get it. Gender means nothing to him so long as they're not boring.
Origin of Name: Ahriman, or otherwise known as Arimanius, or better yet as Angra Mainya, is originally thought to be the first personification of the Devil.
In this RP, Nix plays as one of the Devil's personal pets. Second to Abdiel, who is and extension of the Devil's right hand, Nix often gets snubbed from the good "missions" to corrupt and do havoc, which leaves him awfully bored and irate. He likes to be entertained, so more often then not he can be seen getting into trouble and causing it to happen because it amuses him to no end to see someone else more frustrated than him.