Well, if anyone was going for a realistic portrayal of a royalty-related female (whatever rank), the stereotype pretty princess like thing wouldn't really work, as most of them were butt-ugly, fat and pale.
But seeing that this comes from some invented fantasy thing, I think it would be alright to take it with a pinch of salt.
What I would recommend is to design clothes and accesories putting priority on usability (if that makes sense) Make a reason why she is wearing something, and not just "because it looks pretty" (thing that square enix fails to understand IMO).
As for the underskirt thing right now all the attempts don't work that well, maybe you could just mask it with adding another set of folds instead.
As for the colors, I would go with something less muddy and instead make them more vivid. The sprite has already a small face/body, so a key thing would be readability, and right now it kinda fails to do so since many colors blend together.
A more interesting palette mixing tints would be neat. (Of course it would vary depending on where you are, your surroundings and light sources, but it makes it look more interesting overall, than just a ramp)