The perv in me wants to say Tifa, Ashe or Vanille - who happen to be three of my favourite FF characters, so it's probably biased too. However, when I think about the best costumes one person jumped to mind faster than all the others, so Rinoa it is. I think it's very simple, tasteful and somewhat elegant. Lightning gets a good mention, although her Lightning Returns outfit is rubbish.

And while the perv runs strong in those I was considering, I have to say the worst dressed is Fran. I mean, at least leave a little to the imagination. Geez.