"Are you sure that's a real spell? Well it's not very good is it? I've tried a few simple spells myself and it's all worked for me. Nobody in my family's magic at all, it was ever such a surprise when I got my letter, but I was ever so pleased, of course, it's the best school of witchcraft there is I've heard - I've learned all the course books by heart of course. I just hope it will be enough - I'm Hermione Granger, by the way, who are you?"
From Harry Potter and the Sorcerer's/Philosopher's Stone on Hermione first meeting Harry and Ron on the Hogwart's Express

"I hope you're pleased with yourselves. We could all have been killed - or worse, expelled. Now, if you don't mind, I'm going to bed."
From Harry Potter and the Sorcerer's/Philosopher's Stone after their encounter with Fluffy

"Harry - you're a great wizard, you know."
From Harry Potter and the Sorcerer's/Philosopher's Stone right before Harry leaves Hermione and Ron

"Books and cleverness. There are more important things - friendship and bravery."
From Harry Potter and the Sorcerer's/Philosopher's Stone after Ron had sacrificed himself so Harry could go on and get the stone.

"There you are, then! They see the Grim and die of fright. The Grim's not an omen, it's a cause of death! And Harry's still with us because he's not stupid enough to see one and think, right, well, I'd better pop my clogs then!"
From Harry Potter and the Prisoner of Azkaban when Hermione doesn't take the Grim in Harry's cup seriously

"A telephone Ron. Honestly, you should take Muggle Studies next year . . "
From Harry Potter and the Prisoner of Azkaban when Hermione corrects Ron, who claims to know how to use a "fellytone"

"Oh did I? Just because it's taken you three years to notice, Ron, doesn't mean no one else has spotted I'm a girl!"
From Harry Potter and the Goblet of Fire on Ron realizing that Hermione could be his/Harry's? last resort for the Yule Ball

"What were you going to do, snore at them?"
From Harry Potter and the Goblet of Fire putting Ron down for bragging about what a hero he could have been during the second task