So, like I've said before, fighting anime aren't really my thing. A few of them stand out as good though, and this one definitely qualifies. These small piece of "armour" is so small at first. So insignificant. However, they allow him to decimate much larger opponents, or even groups of opponents. That piece is
ROY MUSTANG'S GLOVES (FULLMETAL ALCHEMISTAND FMA: BROTHERHOOD)
Now these gloves are no ordinary gloves, for those that don't know. They are known as "ignition cloth", where when he snaps his fingers they create a spark. Seems really innocuous, but with alchemy (the power of this particular anime universe), he is able to modify the air pressure and create powerful explosions at will. For that, he is given the appropriate title of "Flame Alchemist".
Excuse the Spanish subtitles, but it still displays Roy's badassery, and his awesome gloves. Not only are they sleek and stylish, but they blow things up.