Takumi *having* the Mezzaluna pretty much, to me, means that at some point, he challenged Souma and got it back. That's pretty amazing in itself.
And hey, let's be honest, to *be* part of the Elite Ten, you are kind of required to be a freak of nature in order to keep your spot, let alone advance in ability.
I am interested to see how the match up with this "Sarge" and Souma is going to go, because it seems like Souma already went and intimidated her offscreen.