Demi had a pretty good idea, and I'll follow suit.
Penny - healer - Unless someone gets hurt, she probably won't ever figure out what it is she can do, she'll just be super pissed she can't work on her spells anymore.
Ari - chaos demon - No wings! And he was a douche before, but now he's actually going to thrive on being a douche to people, so look out world. Any victim volunteers?
Kennedy - incubus - He's going to be able to feed off peoples' attraction to him, which means that now he'll be able to tell who wants him. It will both excite and appall him. If the attraction is strong enough, he might act on an impulse or two.
Beth - dhampir/werecoyote - She won't cope well with wanting to drink blood and also the thought of having to shift into a were. She'll be edgy all week (since she won't drink blood because t's icky) so would anyone like to get in a fight with a delicate flower?
Nicanor - witch - Spells will be cast by frustrated cursing, and things will happen. If anyone has ideas for those things, let me know.
Max - dryad - Not being a hellhound will not only make Max angry, but will land him in some pretty hot water.
Lily - succubus/empath - She feels ALL THE SEX!
Shelley - regenorator - She's gonna pout. A lot.
Godric - medium/shapeshifter - Yay for being human! But he's gonna look like a lot of different people this week and be talking "himself".