"Just because you have the emotional range of a teaspoon doesn't mean we all have."
— J.K. Rowling (Harry Potter and the Order of the Phoenix)

"Ooh, you look much tastier than Crabbe and Goyle, Harry" said Hermione, before catching sight of Ron's raised eyebrows, blushing slightly and saying "oh you know what I mean- Goyle's Potion looked like bogies.""
— J.K. Rowling (Harry Potter and the Deathly Hallows)

"I will not calm down!"
— J.K. Rowling

"Her voice was now so shrill only bats would be able to hear it soon, but she had reached a level of indignation that rendered her temporarily speechless..."
— J.K. Rowling

"'This is mad,' said Ron. 'We're the only ones left who haven't got anyone - well, except Neville. Hey - guess who he asked? Hermione!'
'What?' said Harry, completely distracted by this startling news.
'Yeah, I know!' said Ron, some of the color coming back into his face as he started to laugh. 'He told me after Potions! Said she's always been really nice, heping him out with work and stuff - but she told him she was going with someone. Ha! As if! She just didn't want to go with Neville... I mean, who would?'"
— J.K. Rowling (Harry Potter and the Goblet of Fire)