These are really neat!! I could see these being like a front and back design for a shirt or something.

I have a dumb question, since I don't do digital art, but how do you put that little outline around the forms? It's a cool affect. ^^

Its an FX filter applied to the layer. Its called stroke.

Cool thanks! :D

I like the first(left) one myself. The one winged angel thing is more in depth. Plus the third eye is a Hinduism thing; not associated with the European Christianity beliefs. ;) I do like the second(right) one's chaotic personality. It screams from her. The left looks lawful evil/true evil. Both are gorgeous though.
Sorry for my random input. ._.

Err... I just noticed the evil aura that made her "claws" and I REALLY like that. Insubstantial things becoming substantial is always cool in my book. Good work.

And Oni- actually thats probably what I was thinking about with that bat-winged one. Same with the decision made on the horn design on her.

Well, understand that I dont make demons based strictly off of judeo-christian background, in general I just kindof draw what looks nice and the third eye comes from more than just hindusim but largely it just plays an eye as an aesthetic decision- but if there is influence, its usually going to come from old testament shinanigans where demons were not quite the demons that are dealt with in the new testament and later works- and then also succubi- basically I just use 'demon' as an easy catch-all term cause Im lazy ; p. Anyhoo, thankya! : )

No problem. I like it overall and underall and [adjective]all.