Guinevere seemed to have allot of new dresses this series, and I just put a few photos together so we can all see what they look like in a bit more detail. There seem to be three, the blue, white and purple! They all seem to be missing the large open sleeves from the S2 purple and S3 pink. I really liked them but these dresses are so lovely I can get around that!
For the blue one: (New shoes too maybe?) There is an apron on one shot of her from behind but the others there is not. The apron is the only sign that I can find of a servant like status. Maybe that is from something else however? But it's lower cut, fitted, made of allot more material and has a bit of frill or lace like stuff at the bottom!
The purple one is again fitted and so pretty on her darker shade of skin. Not as many layers as the blue but still low cut, and it has a detail of some sort on the front. Her hair can be see really well in these shots! (The fans who took them are AWESOME!)
Last is the white dress that is really hard to see. This is the only photo I can find of it, but I hope we see more of it SOON!