As for the question about weakness in the Legion, I think conventional bullets will do little damage, unless well placed, making your character a prime candidate for being efficient. There are ways I think, for instance, the weapons used by the Legion could well penetrate, but regular bullets bounce off.
A big part of this is, I like the idea of battles being thought with melee weapons, bit more dynamic. Gun-kata on the other hand, deff fits this dynamism! So yeah, swords and well placed bullets, and their own bullets, and brute strength.
Anyway, here is the link to the story thread