There was a Black Mirror episode that makes plain the downside of a virtual representation: it can be taken from you and manipulated by someone else. The persona becomes a sale-able commodity, and can be separated from your control.
I remember hearing that this exact thing happened a few years ago in either Japan or South Korea.
There was a talent agency that had three-four performers who took shifts streaming games through a shared vtuber persona who had build up some popularity. At some point the agency fired the performers and replaced them with a new performer who didn't have the same performance.
The fans weren't told but it was immediately apparent, so they started demanding the changes to be reverted. The fans were ignored and both the vtuber's popularity and the agency fell back into obscurity.
I guess the lesson here is that personas are personal.
