>>101510990A meet and greet is usually the vtuber on a screen with a mic and webcam set up, unless it's one of the rare chuubas who also does IRL content, in which case you might see them in the flesh. For example, I glimpsed Megalodon there, but didn't want to hassle her.
And I am sure I would have been the first person ever to say that to the Filian cosplayer lel