Even though they put out the video showing the shades (and Pierro) the actual playable 6.X roster will probably only contain Columbina since they also need to fill out the cast with randoms from Nod-Krai and its surrounding areas on top of the usual literally whos from Liyue and 1 or 2 old regions
But which of the harbingers will actually appear in the story? According to the web event all of them have been recalled and sent to Nod-Krai, but I somehow doubt most of them will appear beyond brief cameos

>>530198489
god I can't wait for sandy in nod-krai