She is a little surprised by the man in front of her speaking to her, but on the other hand she can only think that it is natural that he addresses her, since none of her other classmates seems mature or serious, she certainly does

I try to read Lolita, but all these orangutans and their noise aren't letting me...

Looks disdainfully at her classmates and rolls her eyes in annoyance

thoughts:

Is this true? A grown man noticed me? Out of all the other idiots in my group, he noticed me? It's my time to impress everyone showing that I'm the most adult and mature!