That was news.  "Oh.  I'm...sorry.  How long have you been dancing here?"  If her body was not in the shape that it used to be, then Bella had to have been here for quite some time.  "I'm sure that whatever Lady Miki asks you to do, you'll be very good at it.  If I can, I'll help you with it!"  She knew - sort of - what it was like to be good at a thing, and then be forced to do something very different from what you'd been doing before.