Nvm the last comment! They've stepped aside if you're interested since they're already in the comm. Here's what I was thinking and it's a SHAMELESS copypasta haha.
i imagine they've known each other maybe a year or two, and she took an immediate dislike to him because he probably tried to impress her when they first met in a douchey way that backfired and then to kind of save face he kept being douchey or something? i know he slashed one of her tires at a food truck festival, so she wrote tons of fake yelp and google reviews to get back at him and it's like an escalating prank war ever since basically~
tbh i would really love it if he actually has a huge thing for her but is super dumb about how he expresses it and it doesn't have to turn romantic on her part unless we wanted it to because i'm pretty organic that way tbh. but it would be fun if the possibility was there. and yeah. they just rag on each other and she badmouths him all the time as it is, lmao. she has responded multiple times when asked questions about nemeses/enwmies/Achilles heels etc that it is the guy from Burger Bus so know it's basically a meme