Paramilitary, huh? He nods at her statement, because it does make a certain amount of sense. Even if he can't understand what use full armor is, and doesn't seem to think he's going to get much of an explanation on it. Plus it's kind of nosy on him.

He can't see her smile, but he smiles down at Petunia himself. The sheep happily ignores him in favor of eating more grass.

"Name's Barnes. James Buchanan Barnes."