As someone that got into Hololive precisely because of Takamori, I must say this is n extremely disappointing turn of events. I think most people saw it coming but I still had hoped for them to be able to work things out but it wasn't the case.
I can't blame Kiara for wanting to be more than just Calli's crazy love interest but the way she did it, well it wasn't the best. She took off the veil that kept Vtubers separate from regular streamers and I simply won't be able to see her and Calli in the same way. I wish them both all the best but whatever comes next is not something I'm interested in seeing, is just not the same, and I do not like the idea of seeing Kiara having new "canon" ships because I can't give them the benefit of the doubt anymore.
The upside is that breaking the link between the character and the performer means that I can keep enjoying Takamori fan works (for as long as keep doing them, at least) by taking them as if they were just another couple from a manga or an anime and ignore completely the existence of their RL counterparts.