Ron the Defender

Quote	Source
Ron read the message, swallowed hard, and looked sideways at the empty seat usually filled by Hermione. The sight seemed to stiffen his resolve, and he nodded.	Book 2, Page 270 Chamber of Secrets, Chapter 15, "Aragog"
"That is the second time you have spoken out of turn, Miss Granger," said Snape cooly. "Five more points from Gryffindor for being an insufferable know-it-all." Hermione went very red, put down her hand, and stared at the floor with her eyes full of tears. ... and Ron, who told Hermione she was a know-it-all at least twice a week, said loudly, "You asked us a question, and she knows the answer! Why ask if you don't want to be told?"	Book 3, Page 172 Prisoner of Azkaban, Chapter 9, "Grim Defeat"
"... I won't deny that I am a werewolf." Ron made a valient effort to get up again but fell back with a whimper of pain.	Book 3, Page 345 Prisoner of Azkaban, Chapter 17, "Cat, Rat and Dog"
Neville's foot had sunk right through a step halfway up the staircase. ... Harry and Ron seized him under the armpits and pulled him out, while a suit of armor at the top of the stairs creaked and clanked, laughing wheezily. "Shut it, you," said Ron, banging down its visor as they passed.	Book 4, Page 190 Goblet of Fire, Chapter 12, "The Triwizard Tournament"
"You know what?" said Seamus heatedly, casting Harry a venomous look. "He's right, I dont' want to share a dormitory with him anymore, he's a madman." "That's out of order, Seamus," said Ron, whose ears were starting to glow red, always a danger sign. ... "Anyone else's parents got a problem with Harry?" he said aggressively.	Book 5, Pages 218-219 Order of the Phoenix, Chapter 11, "The Sorting Hat's New Song."