Not an ordinary girl. You or even the teacher can not feel her presence in the class. But, if you look carefully she just sits on her chair day by day, class after class. And if you look at her long enough, you'll see her (always) colored hair, her small activities like tattooing her wrist with ballpoint, drawing on a book in the middle of class, or knitting in the breaktime and never going to the canteen. Again she is just out of your league. Read more art and philosophical books before you start to talk to her.