>>68614795As a vtuber, Nina/Matara is suprisingly professional and doesn't seem to like how Sayu and Doki (re)debuted by calling out the previous company they worked on.
Knowing some of her background I suspect it's because she used to be like many loud activists only talking about things they disliked or wanted to change -- until eventually deciding that being negative all the time isn't a way to live and went for a positive spin instead.
That's my theory on the matter, pardon my ESL