My best guess for why streams with Shiori in them are shorter is because you can genuinely see she has a social battery
It doesn't show up so much on solo streams because she's just talking in to a mic with a bunch of people feeding her things to ramble about in the chat
When she's with the other girls she doesn't dislike them or not want to play with them, she just runs out of social energy and wants to stop
Think of it like playing a game solo then playing a game with a group of friends (sorry some of you can't relate), you can play a single player game for hours on end but playing a group focused game, especially a high energy horror like Lethal Company, it drains you easily
TLDR Shiori doesn't dislike the girls like you schizo dramafags want to perpetuate, she just can't handle the energy needed for collabs
