>>357196なのだ is just standard Japanese. Roa's was でよ, which is also standard, but she uses it to replace だよ, which isn't really in any dialect.
Management tried to not bridge them probably they didn't want either to be getting into a fight ironically. Also, they definitely weren't leaning into a side until mid August. They told Meiro to use standard dialect, and when she didn't, Roa went on hiatus, and they told her that if Roa's ends up quitting because of this, that it would affect her collabs. Of course, Meiro doesn't really give a shit and just continues, 6 weeks of management not doing anything at all, and it isn't until Roa vague tweets on 8/15, do things really blow up.
Once Roa has brought it into the public, viewers start to realize that it really is a feud between Roa/Meiro, and Meiro was the reason Roa took a break for a few weeks. Meiro is obviously furious that people are flaming her, and for some reason, gives management an ultimatum. Either they put out a statement that her accent is real, or she quits. Management obviously does not want either, and gives a pretty good response imo. They retweet their policy against harassing members, a clear reference to the current situation, and give Roa a warning about vague tweeting. Meiro can go on as usual, and if Roa ever vague tweets again, they'll take her twitter and temp. suspend her. For some mindbogglingly stupid reason, Meiro decides to quit instead, saying that tweeting their policy against harassment isn't actually going to get people to stop talking about how she's copying Roa now.
Whatever else she did copy, was after Roa went to twitter to vent. She created Eve, and put up a twitter header that resembles Roa/Chitose. Roa, in her twitter description, says that she'll wait for HxH no matter how long it goes on hiatus, and Meiro on her castlevania title, says she doesn't mind if HxH never comes back.
Management only leans to one side after her resurrection stream.
