Kanon neeeeeeeeeeeds to release something.
If it's not been posted, on BABY, THE STARS SHINE BRIGHT, there is an Alice and the Pirates x Kanon Wakeshima, sort of, collaboration. I can't think of a good way to describe it.
http://www.babyssb.co.jp/info/20091116-kanon.html
Basically it says that a special version of The Castle of Nightmare series dress was made for Kanon. The dress she's wearing is special and is her stage costume so it can't be purchased but the series itself is up for reservation.