I have thought about this many times, especially after the green Vtuber that died in the car crash a day before her anniversary. I wonder what would actually happen if one of the Hololive girls randomly died. I know that a few of them have had health scares before (like Botan). Would she graduate? Would they reveal her identity? Keep her content up as tribute? Pass the earnings to her family? How would the morale be affected over the news and how would the hardcore fans would react.
Just in terms of termination, the departure of a member is a little different