[quotes] j.k. rowling
The common room was packed and noisy. Everyone was eating the food that had been sent up. Hermione, however, stood alone by the door, waiting for them. There was a very embarrassed pause. Then, none of them looking at each other, they all said "Thanks," and hurried off to get plates.
But from that moment on, Hermione Granger became their friend. There are some things you can't share without ending up liking each other, and knocking out a twelve-foot mountain troll is one of them.
[Harry Potter and the Sorcerer's Stone, J.K. Rowling]