I've "made" a dress for Ariel today, and by that I mean I took someone else's work and tweaked it for my own purposes. This started life as an oriental dress with a flower print (Daz asset called Polyantha Rose Dress). I removed the sleeves and gave it this snazzy gradient color/texture.
I am super happy with how she turned out. I have to say that this is pretty much spot on what I had in my head while describing her in the book. She was supposed to look friendly but have an air of royalty to her, which is a tricky balance to strike.