Think the first 2 panels are wrong. The girl didn't scam her before, it's their first time meeting. Mitsuha is using the ring to trick the girl, just like she did with a dress to someone else.
First bubble in the second panel I'm pretty sure she's saying she doesn't have any problems with...
@R-Mod She appeared in literally 1 chapter and was unnecessarily rude to the MC. And you actually care about her? Whatever floats your boat I guess. Seems like just another generic character to me.