Disclaimer - Everything recognisable from the Harry Potter universe belongs to JK Rowling
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Prompt – Ron and Hermione get curious when they notice Harry's patronus has changed from a stag to a ferret
"Why are the Dementors are back again?" Harry shouted over the roar of the wind.
"No idea!" replied Hermione.
The dementors began circling them, getting closer. Focusing on his happiest memory, Harry uttered the incatation with all of his might: "EXPECTO PATRONUM!"
Where a stag would have been previously, a smaller mammal stood. A ferret, to be precise.
"Harry, I don't mean to ruin your moment or anything... but why is your patronus a ferret?" Ron asked tentatively.
"I have no idea." Harry supplied quickly. Perhaps too quickly. However, there was no time to dwell on the change, as Professor Snape was hurrying towards them, followed by a small group of wizards. They seemed angry.
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"I think if I stay up any longer I'll pass out," said Harry, standing up. "See you in the morning." Waiting keenly for Harry to leave, Ron and Hermione turned to face each other.
"It's rather odd, isn't it? Harry's patronus, I mean."
"Certainly," replied Hermione, though she seemed to know something Ron didn't.
"What is it?" Ron asked her.
"Well, I have a theory as to why Harry's patronus changed. You see, patronuses can change – but only because of love. It changes to the other person's patronus, one that matches it, or, if the other person is unable to conjure a patronus, an animal that represents them. Now, remember back in 4th year when Moody turned Malfoy into a ferret?"
"You don't think..."
"Oh, I most certainly do," she replied in a matter-of-fact tone only she could pull off. "I believe that Harry is madly in love with Draco Malfoy."
And, being Hermione Granger, she was once again right.
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