Penelo’s dressed better than Vaan. Where as Vaan has a tiny boy vest, Penelo is at least wearing clothes that fit her:

But her clothing looks like a costume looks from the X-Men.
Seriously, the blue and yellow makes her look like a Marvel character. Her armor design is consistent, but her leg makes her look like she has cankles. If she were a Marvel mutant, her power would be foot-stomping. Perfect for a dancing. Like Vaan, she has huge leg armor. What is on the ground, for what they have
Ever since Final Fantasy VIII, at least one female character has angel wings on her back, denoting purity. Rinoa, Eiko, and now Penelo. Only here, the lady has angel wings made of bronze. Cute, in a very rustic design. Until you see her from the front.

Now you can see just how unflattering those leg armor pieces are. There looks to be a spider emblem on her leg armor. Maybe this is where you kick desert spiders?
But what’s with the rest of her outfit? Apparently, she’s wearing a frilly dress underneath her blue and yellow spandex costume. Or is the frilly shirt a part of the spandex? Why? She’s a street urchin, so she’s wearing whatever she can. But where did she get the spandex with the zipper on the front? How does she fit in the spandex if the zipper is in the front, but only goes the neck? Is there a zipper in the back? The blue just stops at the things, but the yellow continues down the legs. The yellow bands wrap around the legs just above the knees. The yellow clashes with her skin tone, so without the boots her clothes…compete with her?
The colors look really nice, but this isn’t something you’d walk around in, especially not the desert. All of the bronze leg armor would weigh her down, and cause fatigue in the hot desert. If they aren’t heavy, they’re just decoration and they protect nothing.