That-I-Don't-Know-What-it's-Called is a headband and it's basically for the sake of coolness or to keep the hair out of his eyes.
Also, why do some female fighters wear skimpy clothes? I know for fanservice, but is there any practicality? I once read this manga called Dragon Half and almost all of the female characters wore skimpy clothing and I'm like "Don't you think that is just a wardrobe malfunction waiting to happen?"
Also, buruma, like the anime girls wear for gym that look like swimsuit bottoms, they apparently make it easier to move, but they look like you are going to get a wedgie from those and shorts are no easier to move in than those things. I mean, the guys wear shorts? Why can't the girls do so? How sexist?
Also, schoolgirls, for crying out loud, WEAR SHORTS UNDER YOUR SKIRTS! Why don't you? Are the skirts to short? If so, then you have a probelm you need to address to the school.