Harry Potter and the Sorcerer's Stone
"That Quidditch cup'll have our name on it this year," said Wood happily as they trudged back up to the castle. "I wouldn't be surprised if you turn out better than Charlie Weasley, and he could have played for England if he hadn't gone off chasing dragons." (10.65)
Someone knocked into Harry as they hurried past him. It was Hermione. Harry caught a glimpse of her face – and was startled to see that she was in tears.
"I think she heard you."
"So?" said Ron, but he looked a bit uncomfortable. "She must've noticed she's got no friends." (10.78-80)
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. (10.160)