I don't really like chuunis, but this was an enjoyable character. The "chuunism" was justified to some extent, though I believe it to be just a process of understanding oneself. I think people have different faces and from time to time one can look like someone else, yet all of those faces are just part of one true person.
In this case Keke, the Ying and Che are all part of this one girl that couldn't accept that all those things she wanted to be could belong to the same person, yet they do (which she realizes in the end).
Cool story overall, just wanted to share some thoughts about "faces" and stuff. Sorry for my non-native english.