>>18063490You have to figure it's part of her assigned character, OP. Also judging from someone like Mori, it's actually-plausible that she really IS like that and you just don't want to believe it until eventually, a massive mountain of evidence makes her either a world-class method actor or someone actually cynical/sarcastic/level about many things in life.
You might have a serious side of you where anything work-related is sterile and professional and so, it's unfathomable to see someone act mopey and retarded/goofy/odd as part of their job, but it really really is for a Holo. They sell personalities not talent, at least not in the usual showbiz way of acting/singing/dancing. So their engagement and interactions with the viewers are all in fact essential to really selling that personality to people, for example the Rushia stalking users type posts and such really help sell her as a yandere GFE type.