Here are some moments from PoA:
Flight of the Fat Lady (p. 120)
QUOTE
Next moment, Professor Dumbledore was there, sweeping towards the portrait; the Gryffindors squeezed together to let him through, and Harry, Ron and Hermione moved closer to see what the trouble was.
'Oh, my -' Hermione exclaimed and grabbed Harry's arm.
The Marauder's Map (p. 149)
QUOTE
'Yes, but - but -' Hermione seemed to be struggling to find another problem. 'Look, Harry still shouldn't be coming into Hogsmeade, he hasn't got a signed form! If anyone finds out, he'll be in so much trouble! And it's not nightfall yet - what if Sirius Black turns up today? Now?'
'He'd have a job spotting Harry in this,' said Ron, nodding through the mullioned windows at the thick, swirling snow.
'Come on, Hermione, it's Christmas, Harry deserves a break.'
Hermione bit her lip, looking extremely worried.
'Are you going to report me?' Harry asked her, grinning.
'Oh - of course not - but honestly, Harry -'
Gryffindor Versus Ravenclaw (p. 195-6)
QUOTE
Only one person wasn't joining in the festivities. Hermione, incredibly, was sitting in a corner, attempting to read an enormous book entitled Home Life and Social Habits of British Muggles. Harry broke away from the table where Fred and George had started juggling Butterbeer bottles, and went over to her.
'Did you even come to the match?' he asked her.
'Of course I did,' said Hermione, in a strangely high-pitched voice, not looking up. 'And I'm very glad we won, and I think you did really well, but I need to read this by Monday.'
'Come on, Hermione, come and have some food,' Harry said, looking over at Ron and wondering whether he was in a good enough mood to bury the hatchet.
'I can't, Harry, I've still got four hundred and twenty-two pages to read!' said Hermione, now sounding slightly hysterical. 'Anyway ...' she glanced at Ron, too, 'he doesn't want me to join in.'
There was no arguing with this, as Ron chose that moment to say loudly, 'If Scabbers hadn't just been eaten, he could have had some of these Fudge Flies, he used to really like them -'
Hermione burst into tears. Before Harry could say or do anything, she had tucked the enormous book under her arm, and, still sobbing, run towards the staircase to the girls' dormitaries and out of sight.
'Can't you give her a break?' Harry asked Ron quietly.
'No,' said Ron flatly.