The obvious assumption would be Dungeon Master, but it’s confirmed that High Rollers DM Mark Hulmes is in the DM seat. Perhaps she’ll be a5e Bard? It would be thematically appropriate, and cover aDnD classnot yet used by one of the BG3 companions. ...
I'm still a big fan, though. All the different characters play so differently, which makes for interesting puzzles. So far I've only "beaten" (ie done an all zones mode) with Cadence, Melody, and Bard, but I've come close with some of the others. Not Aria, though. Haven...