Charisma break?

I don't see any chairs, was Remilia drinking her tea standing? Or worse, crouching?

or flapping around :3

Invisible Chair?

Floating in the air?

Can you not see? She was holding herself up with her left arm. That's what I do, anyway.

I wonder if it would be more clear if all four of them were shown busting through a wall or something?

Also, somehow, Sakuya will stab Meiling for this.