Yeah, that happens when opposing villager personalities meet haha. Chevre and Pippy always have run-ins with each other. Chevre's a normal and Pippy's a peppy. I always go to talk to Pippy and she says something about how she offended Chevre and wants me to send gifts to her to make up for it. It's quite amusing ^^
All the time lol. Among others, Carmen wanted to have girl talk with Merengue, but they have different ideas of what that may be so in the end Carmen declared she couldNOT talk to Merengue xD
My villagers all get along for the most part. Bunnie and Roald have been friends for a long time, if it was a thing I'd say they're dating actually. That sounds weird but keep in mind this is a fictional video game, and besides stuff like Lottie crushing on Digby is canon.
Anyway, I say that because they're always at one another's birthday parties and they're very discrete about their... whatever it is. But Bunnie says she made "good friends like Roald", and Roald gives me a positive reaction when he asks me who the strongest in town is and I say "Bunnie". So clearly they get along. But the other day I saw Roald walking away from a furious Bunnie. I don't know what that was all about. But these friendships and random interactions, good or bad give the town more personality.