Originally Posted by Edvin Black
I do not know anything about that
Right, while there is some scripting between three characters their relation is not specified.

Personally, the less we see of the classic characters the better. BG3 is so far away from BG1&2 that at this point I would rather keep those as far away from each other as possibly. It's a bit like if Luke Skywalker showed up in Spaceballs.