"Yeah, you definitely are," he answers this with stone cold seriousness. "I imagine all kinds of stupid shit. The other guys in my party call it my gamer brain."

So you and your historically inaccurate costume are pretty much exactly up his alley. Also he just called his 'friends' his 'party'.

"But I'll take your word for it. Even if I am bleeding out somewhere, not sure there's a lot I can do about it." He rubs his chin, clearly trying to think what he would do. "Unless this is one of those manga where we're all dead, and this is a test to see what happens to our souls... "

You know the ones! He assumes.