When someone puts so much work into an edible tribute, it's touching really. You've got to REALLY love Hello Kitty to devise a plan of attack for such elaborate sushi rolls. And to think, poor kitty will be eaten up so fast!
As an American, I'm not super familiar with the traditional high tea ritual. Once for a bachelorette party I had tea at the Bellagio with a bunch of fancy ladies. We had champagne and lots of tiny delicious foods. This cake would have been a gaudy yet not unwelcome addition.