Personal Headcanon: Flitter attended Canterlot University as a student majoring in biology, she was also a cheerleader for the college hoofball team. Today she is a grad student at the university studying entomology for her doctorate, it is also why she has little dragonfly cutie mark, she is into little flying critters (both normal ones like insects, and magical ones, like Breezies, which is why she was in the Breezie episode).

And if none of the above interest you, hey cute pony cheerleader!

Edit: Added cutie mark, derp!

Enjoy!