They don't, because that would be insane. Biboo frequently streams for 8+ hours uninterrupted and you think she's putting on a fake voice the whole time? Absolutely delusional
@@Candlemancer admittedly, some do/did - and usually end up with throat issues as a result of it. iirc Suisei used to use a more "cutesy" voice than she currently does until she developed throat polyps which needed surgery. And Snuffy used to use a higher pitched voice and then started using her "natural" voice which caused her popularity to skyrocket coz it turns out people really like sultry voices like that.
While there are some vtubers that change their voice when streaming, i dont think biboo change her voice ( at least not in exaggeration ). This is just her more energetic voice that makes it seem like she is changing her voice a bit. Also she has asian blood so a woman being higher pitch is not uncommon in Asia so her voice sounds normal to me.
