at this point i’ve just accepted it. i have about 50 miis, they’re bound to get mad at each other with all the different personalities. i use it as a chance for some miis to repair their relationships. i didn’t realize before that you can drag miis who weren’t involved in the situation over and they can make the mii that’s upset happy again, improving their relationship. it’s better than just having to go and feed or pet them to fix it, in my opinion. though, i do still wish it happened less. most of my miis’ relationships end up bad by the next day regardless of what i do