"A mercenary, but most of Emon doesn't want to think they're hiring something like that, so we're 'adventurers for hire'." While he tends towards euphemism, Percy has few illusions about what he really is. Some of Vox Machina do see themselves as adventurers and he would class them as such, but not all.

It's only when she mentions musketry that he perks right up. "Do they now. Well, at least that means they'll have access to black powder."

He's already planning something. (Probably that he needs to work for the Lodge for a time before building his own forge and setting up as a gunsmith.)