First off, I adore it when I find a well created world on Fiction press and I think you've achieved that.

The casual throw-away lines about planets and city structures were a great example of showing not telling and I love how you used weapon-choice as a way of conveying Javier's personality.

A problem that I had however, was the lack of double spacing between some of the dialougue for example:

“I'm Javier Reuts. Just Javier is fine. We should spar again sometime, you have much potential.”
“Yeah, sure. But not any time soon, my leg's gonna be swollen for a week.”
“My apologies.”

It's a personal preference, but it didn't look right after you'd previously used double spacing between speech.

Also the massive paragraph begining with 'Echos bounded around the halls...' was a little intimidating as a scrolled down onto it and while the content in terms of action was great, perhaps it could be broken up in a few places.

Apart from that, great story, a tiny aspect of the plot that really stood out as cute to me was the reduction of Verdani's name to demonstrate the growing familiarity between her and Javier and in romance it subtleties like that which I think are great.