fluid in the knee = really bad >.<' that is painfull :/
hope she gets well soon!!!

ouuuuu -____-
Poor Ayu, I hope your knee will get better *cries*

I wonder what'd been left healthy after she's retired sumday...

Crap...I hope she'll be OK. Stuff like this tends to become chronic if you're not careful. Areas like the knee and back are the worst to aggravate... Her harsh schedule doesn't make recovery any easier.