Demon Roleplay with a Twist

Ok guys. I've been thinking about this particular roleplay I'd like to do involving a demon, a possessed person, and a priest. I know you're probably thinking, "Not another demon roleplay!!! -.-" but this one has a bit of a twist to it, so please give this a read and then if you're still not interested in it, that's alright.

Now for the specifics. I'm thinking that this will be a one on one roleplay in which each of us plays two characters, one of each gender. It would start out with one of us playing a masculine demon in whatever form that person would like to use while the other person plays a human female that will be eventually possessed. Then after she is officially taken control of, the person originally playing the demon would take control of the female character and effectively roleplay being possessed while the person that played the female will move to roleplay a male priest that will exorcise the demon from the woman.

Now I'm not thinking some Nickelodeon demon stuff here... I'm thinking the darker, the more disturbing, the more twisted the better.

I'd prefer to play the woman pre-possession and the priest while my partner plays the demon and possessed woman. I'm also looking for more detail per post, so one-liners aren't really going to work here unless it's dialogue and extremely witty, heh. I will be able to post roughly once a day, sometimes more and sometimes less depending on what I've got going, so someone close to that would work best. I also want to do some planning OOCly first to make sure we understand what's going on in the IC and if we have anything we want to discuss about future plot points and stuff, so please be willing to talk OOC with me :)

Hmm I think that's pretty much it for right now. If you're interested please send me a PM and we'll chat! Feel free to post any questions you have here and I'll be sure to answer them as soon as I can!

Thanks so much <3