"Oh shit really?" Any awkwardness is promptly forgotten at the promise of fighting with other people. She doesn't even bother pretending to be cool or above anything. She's had a taste of fighting strangers and she wants more. "Yeah, that would be cool. Take me with you next time."

Cool may be getting overused by both of them but whatever, they are cool, what other word are supposed to use to describe each other? That would be beefy? That would be muscular?