The truth is that Kronii has a beef with Fauna because of her involvement in negotiating model changes.
Kronii raised hell with management because of Council's sleazy coombait models and she wanted them changed. This would affect not only Kronii, but Fauna as well. The dumb clock wasn't satisfied with a whorish design that merely has cleavage, sideboob and underboob to go with massive tits, she wanted to go all in and having only herself satisfy her needs wasn't enough. She wanted Fauna to have the figure of a fertility goddess and a bust putting cows to shame while IRyS would go from a nephilim to a real succubus (unlike that Choco poser) and Bae would remain unchanged due to already being the group's sex toy. If Cover didn't turn the whole gen into a semen milker that would make her lesbian ass wet every stream, she threatened to leave.
Vesper and Magni had the courage to fight Kronii because Waterworld isn't a good movie and Cumworld wasn't the apocalyptic future they wanted, so, they joined Fauna and went to war. They succeeded in convincing management to deny Kronii's wishes, but Kiara caught wind of it and got the boys fired because she was enough of a dyke too.
Kronii was going to leave, but then she found out that Fauna was involved and vowed to have her revenge even if it meant staying in Hololive with smaller boobs and more skin covered.
Ina was there too.