There are three classes of demons.

The Jinn: Those that exist as smoke and fire and though can wreck havoc in this form prefer to seek out a host which they can increase the power of significantly.

Then there are the traditional demons, Horns and claws and hellfire and whatnot.

After that are the very powerful demons in class with the fallen angels that first populated hell. These have a monstrous form but can possess a human when required.

The one I'll be playing is a Jinn. And yes that looks much better. Though I'd imagine it would take some time before they fully trusted you.