"I broke the law. Underage wizards aren't allowed to use magic at home."

"He was their friend… and he betrayed them. [furiously] HE WAS THEIR FRIEND! [vengefully] I hope he finds me. Because …"

"[to Professor Lupin before he heads back to the Gryffindor dorm] Professor, just so you know, I don't think that map …"

"[Sirius: That was a noble thing you did back there. He doesn't deserve it.] Well, I just didn't think my dad would've…"

"[seeing Sirius talking with his past version] You see Sirius talking to me there? He's asking me to come live with hi…"

"[after Buckbeak saves him and Hermione from Werewolf Lupin] Poor Professor Lupin's having a really tough night."

"Honestly, Ron. How can somebody be in two places at once?"

"I solemnly swear that I am up to no good."

"[holding the Marauder's Map] Lumos. I solemnly swear that I am up to no good. Mischief managed. Nox."

"Expecto patronum!"