Harry Potter and the Chamber of Secrets
[Professor Lockhart] didn't seem to notice that the other teachers were looking at him with something remarkably like hatred. Snape stepped forward.
"Just the man," he said. "The very man. A girl has been snatched by the monster, Lockhart. Taken into the Chamber of Secrets itself. Your moment has come at last.
Lockhart blanched. […]
"We'll leave it you, then, Gilderoy," said Professor McGonagall. Tonight will be an excellent time to do it. We'll make sure everyone's out of your way. You'll be able to tackle the monster all by yourself. A free rein at last."
Lockhart gazed desperately around him, but nobody came to the rescue. He didn't look remotely handsome anymore. His lip was trembling, and in the absence of his usual toothy grin, he looked weak-chinned and feeble. (16.114-124)
"Professor," [Harry] started again after a moment. "The Sorting Hat told me I'd – I'd have done well in Slytherin. Everyone thought I was Slytherin's heir for a while…because I can speak Parseltongue…"
"You can speak Parseltongue, Harry," said Dumbledore calmly, "because Lord Voldemort – who is the last remaining descendant of Salazar Slytherin – can speak Parseltongue. Unless I'm much mistaken, he transferred some of his own powers to you the night he gave you that scar. Not something he intended to do, I'm sure…"
"Voldemort put a bit of himself in me?" Harry said, thunderstruck. […] "It only put me in Gryffindor," said Harry in a defeated voice, "because I asked not to go in Slytherin…"
"Exactly," said Dumbledore, beaming once more. "Which makes you very different from Tom Riddle. It is our choices, Harry, that show what we truly are, far more than our abilities." (18.54-61)