Good morning everyone! How are we all today?

Just a few things this morning that I need to say; first off, Rapunzel is accepted! Yaay!

Scarlett, you arr more than welcome to make a couple of villains if you wish, you still have two characters left.

Yoshi, welcome! Just to make it perfectly clear, I have watched the show -quite a big fan- so I know how it can get confusing and such to roleplay. I do see where you're coming from when you speak about remodeling the characters so that they fit into the story while still keeping their original personalities and traits. 
I am willing to allow you to do this and talking myself through both of their back stories I have found a way in which I would be happy for them to keep part of their original ones. Although, a few things would need to change I believe that this could work out for all.
Regina can still be Snow's step mother, however one of two things can happen. One, the story continues and Regina herself kills the King, this means there would be no hope for Snow to get to Earth meaning she would be enslaved and put to work for the Queen. Or two, she doesn't kill the King, this would allow him to get Snow to earth before he himself gets killed or enslaved. Either way I will allow her to have her mother kill the only man she loved and for Snow to have revealed her secret.
Rumpel was a little harder due to all the ties he has however I thought about it and I figured that he could still have a wife a child, with this though his ties across the board would need to be cut (hook and such) that way it leaves it open to everyone; if you wish for him to be on the villain side and take power with the Queen, his wife could have taken the opportunity to send their son to earth while dying in the process. This leaves it open for people if they choose to want to play his son.
As for the setting think Medieval castles and homes and decor, they just have things such as electricity for lighting as well as indoor plumbing for toilets and showers; though the bathrooms are carved out of stone and look more like their own personal grotto with a waterfall (<-shower).

I'm sorry, I rambled, but I hope it helps...