>>28468509Sora, AZKi and Miko for Hololive, but their cases are kinda weird.
>>28468678 mentioned AZKi's old artist passing away but it was after she got her most recent model, so I don't really know why they changed. For Nijisanji the only one I remember about was that whole Naruse drama that his manager forced him to use a second model from another artists almost immediately after debuting and he only managed to go back to his original (which he preferred) almost 2 years later.