I've just been thinking:
There's a full page about the many costumes that Kat can obtain throughout the series. I'm not certain if it's a good idea or not, but I'll pitch the idea anyway: I might make a page about the gestures. I know there isn't much to write about them, but it's a good chance to make use of the photos that you can take with the in-game camera.
If it's not worth doing a separate page about them though, I might simply create a gallery of Kat's many gestures on the "Camera" page, if that makes more sense.
Let me know what you guys think, and I may or not go through with it, depending on responses.