{I know angels and demons have been done before, but, this is one me and my friend worked on that's different.}

At a certain age, 18, You'll either get angel wings and a halo or demon wings, which are pure black, bat like wings with bright red along the bones, and fangs

What wings you'll get is dependant on your aggressiveness, not your moral standings... There are demons who are perfectly morally sound. But demons do, and will always get stereotyped as the "evil ones"

Angels have power over water and cold

{Ex, if an angel wishes too they could make an entire room go freezing cold}

Demons have power over fire and heat

{Ex, if a Demon wanted to, they could make a whole house overheat}

Demons can bite angels to 'Claim' them and make them their property, the angel is then bound to that demon... Once an angel is bitten, their halos go pitch black and their wings go to an ashy grey

A demon can bite more than one angel, while an angel can only be bitten once. Though the biting is more of an intimacy thing than just control or power... Some demons unfortunately use it like that...

The angels that are bitten are supposed to stick around the demon. The two are supposed to be each others protectors...

Demons are physically more powerful than angels {This does not apply to gender or anything Female demons can kick a male angels ass just as well as if it was vise versa}

When an angel is bitten, they get some of their demons power and strength, and on rare occasions end up being stronger than the demon... 

Demons are shunned and feared by angels due to the property biting.

If a demon touches an angel that they have not claimed the angel will get a slight burn.

Angel's typically wear: Neon bright colors, white and pale blue

Demons typically wear: Blood red, black and dark colors.