Prefacing this post by saying I don't really like pandering designs in general.
People saying Fiore's design is offensive from a sexual standpoint aren't wrong, but it's so
awful from a pure fashion standpoint that I can't support it, at all.
Myuria from SO4 is a sexualized design I don't have problems with because it looks stylish in its own way, even if it is pandering to an extent.
Checkerboard Fiore is just like, what? Especially when her companions all have cool looking clothing. Even worse is that her hair and face design are actually quite good, but she's ruined by her fashionista-gone-wrong outfit. I really hope she has checkers/chess themed attack names just to justify her design. "KING CROSS" for example. That'd actually make it somewhat acceptable.
I really liked Celine's design from SO2; it was bordering on the "sexy" and was certainly in the outlandish category but also showed enough restraint that it was also fashionably acceptable.