Ohh, this is a hard one.

I'd have to say, it would be one of two.

Either Full metal Alchemist from....Full Metal Alchemist because, let's face it, theres nothing quite like clapping your hands and creating an explosion.

Or Ichigo, from Bleach. In the first few arcs, not the filler nonsense now, but like, first 65 episodes Ichigo.

Oga from Beelzebub he is just such a bad ass and is so strong

Panty from Panty & Stocking With Garterbelt. I mean who wouldn't want to turn a pair of panties into a deadly ghost fighting weapon. Not to mention that she does well with the boys.