Parvati Patil handed Neville Longbottom a ceramic goblet. He sprinkled something into it, then drank it. Pansy clamped a hand over her mouth. She had been right! It really wasn't Ron, it was Neville and Parvati. She took a step forward, preparing herself to address the pair. When Pansy had taken on the role of the tough girl the students of Hogwarts knew her to be, she personally agreed to stay true to her character.
Pansy stepped out into the moonlight. Parvati and Neville looked up. He dropped the goblet. "And what are you two doing?" Pansy asked lazily, as if she didn't care. "Staying up past the mourner's hour and meeting, doing spells and mixing potions? This does seem interesting."
"She caught us!" Neville hissed in an attempt at being subtle.
"I caught you, Longbottom," Pansy hissed. "But doing what?" She snatched a piece of the broken goblet. There was a thick drop of the potion left. She wiped it clean and examined her finger. "Polyjuice." She diagnosed, wiping her hand clean on Neville's robes.
"It is not!" Parvati said defensively, climbing to her feet. She picked up the candle and held it at eye level. "You'd best be getting back to your room."
Pansy rolled her eyes and snickered. "Who would you be trying to change into, Longbottom? And why on earth would you have Patil help you? She's as dense as quartz."
Parvati scowled, looking offended. "No one asked you, Pansy. Why are you here anyway?"
"I could ask you the same. You tell me your answer, I'll give you mine."
"Answer to what? Why we're here?"
"No, who Neville dearest is trying to morph himself into. Tell me, I'll find out anyway."
"Ron." Neville answered quickly, then gasped. "Oh, no!"
"Why Ron?" Pansy asked, her voice shaking slightly. "What could you possibly want to change into Weasly for?"
"T-t-to try a-a-and g-g-get re-re-revenge." Neville stuttered.
"On me?" Pansy asked softly. Parvati nodded curtly. "What did I ever do to you?"
"We know." Parvati said, just before she and Neville stepped back into the shadows and disappeared from view.

Pansy sat up in bed. The back of her night gown clung to her flesh with sweat. She panted. It was just a dream. There was no conspiracy against her, she had never spoken with Crabbe. None of it was real. She took a few deep breaths and slid of the bed. She found her slippers and walked downstairs. She was surprised to find Crabbe sitting on the bottom of the stairs.
"Pansy? Is that you?" Crabbe asked.
Pansy was speechless. This was exactly how her dream had come. "Crabbe?" She called hoarsely.
"It's me," Crabbe stood up. "It's 2:28 in the morning, why are you awake, Pansy?"
That seemed about right, she and Crabbe talked for roughly 2 minutes in her dream, which would mean when he left it was 2:30. Then. she found Neville and Parvati. It wasn't true. It was just a coincidence. She probably heard Crabbe saying the time and that he was going downstairs to Draco or Goyle and dreamed it.
"Pansy?" Crabbe repeated.
Pansy snapped back to reality. "Yes?"
"Is everything alright?"
"No, Crabbe. I just had a dream."
"A dream?" Crabbe looked at her, struggling to focus in the dark. Pansy had paused halfway down the staircase, and now leaned against the heavy banister. "About what?"
"Nothing, I just came down to see if I left. my book bag down here." If she hurried the conversation along, she wouldn't be down here until 2:30 and prove the dream false. She suddenly thought of a trick her muggle friend had taught her when they were little girls. If you put someone's hand in cold water, you could influence their dreams. The shock of the cold made their subconcious mind alert while their concious mind slept on. That was what had happened.
Enough with the conspiracies! Pansy scolded herself angrily. No one is out to get you! Ron is just being a jerk. No one's making you dream certain dreams and no one's switching bodies to get revenge.
"I know," Crabbe muttered.
Pansy gasped. "What did you say?"
"I said that I know where your book bag is, I wasn't sure if it was yours. It's by the Gryffindor portrait. What were you doing there?" Crabbe asked.
"Just on a walk," Pansy lied. "I guess I'd better go get it."
"I'll go with you. I can't sleep." Crabbe volunteered.
Pansy thought for a moment. If her dream came true, then she would have a witness. "Alright, let's go."
They walked to the portrait together. Crabbe pushed it open and let her through. Once outside, the two walked side by side quickly in the direction of where she had left her bag. Which was had she been walking in her dream? This way? She wasn't sure.
"Tell me about your dream." Crabbe suggested after a few minutes of silence.
"Well, I thought in my dream."
"That's odd," Crabbe commented. "What were you thinking about?"
"I saw Neville and Parvati casting a spell, and he drank a potion. He was turning himself into Ron. He said it was to get revenge on me."
"That's even odder."
"No kidding." Pansy said as they reached the portrait. She saw her bag, grabbed it and slung it over her shoulder. "Let's go. I hate this place."