[ Rin's behavior, which she would probably choose to read as acquiescence to her obvious physical superiority even if it weren't, keeps Jasper's own bearing solidly in casually condescending territory rather than menacing. That doesn't mean she lets her guard down. She never does. ]

I don't know what you humans use, [ she scoffs, and raises the gem to face level to take a closer look. ] It doesn't matter down here anyway. Currency is worthless in this dump.

[ The only pronouncement she makes is a nearly inaudible hn, because Jesus Christ of course it is. The ruby doesn't seem particularly impressive from where she's standing, but, trinket or money or whatever the stone was originally, it clearly means something to her. ]

You can't possibly believe you could barter your way to the surface with the likes of this. He put it here in the first place.

[ she's not calling him professor!! fuck off!!! ]