I was completely wrong with my VA guesses hehe.

Just digging around on imdb trying to see who voiced Roah (didn't find her, must be one of the credits listed as "various" but anyhow saw the custom Tavs "Tadpoled Adventurer" listed with a different actor for each.

https://www.imdb.com/title/tt13258344/fullcredits

I wish that they'd have given them each a set of bark lines to read. They could have built out a pretty massive library of voices for the custom Tavs. I mean there are a lot of people on that list, and so many characters that were just incredible.