Disclaimer: I do not own any character aside from my OC.

She smiled to herself as the liquid in her cauldron turned a satisfying clear, watery colour. In the dark, cold classroom, she had been brewing the potion for the past hour almost, being silent as a ghost. Carefully, the student rummaged through her professor's desk and picked a right-sized vial. She returned to the cauldron and filled the vial with the watery liquid. After she was sure there was no sign of her presence, the girl fled the dungeon classroom.

She wrapped a chain tightly around the neck of the vial and slid the mock-necklace over her head. It now hung above her bosom, nestled in her school shirt collar. The dark corridor was not frightening to her as it was to her friends; the moving portraits blurred by as she sped to her common room.

"Periwinkle pasties," she said to the nearly asleep pink-wearing lady once she got to her common room's portrait hole. The fat woman yawned and opened up for her. The girl stepped into her common room and quietly walked up to her dorm, going straight to bed. She stuffed her Advanced Potion Making book into her book bag. The girl climbed into bed and lay there for a while, her fingers lingering on the Draught of Living Death around her neck.

Let's backtrack a bit, shall we? The girl sneaking around Hogwarts, brewing potions without permission, and then leaving no trace of it has a name and a story. Her name is Alison Jackson – preferring to be called Ali – a pretty young half-blood. Her hair fell in long, brown strands and her bangs cutting across her forehead in long layers. She had striking, icy blue eyes and a devious smile. She was a Gryffindor, and darn well proud of that. Ali was friends with the Golden Trio, believe it or not.

On this particular night, Ali had snuck off to brew the Living Death for a very devious prank indeed. Hermione Granger had told her that if she went along with it, she'd regret it. But, Ali, Harry and Ron hadn't listened. Harry was hesitant, but trouble always seemed to find him either way. Hermione still was unaware of the three's disloyalty to her rules about pranking, and probably wouldn't find out until later.

In the morning, Alison met her three friends at the Gryffindor's breakfast table. She sat, fingering the bottle around her neck. Hermione didn't notice; she was too engulfed in today's Daily Prophet. Ali leaned across her empty plate to Ron and Harry.

"I have it," she said in a low voice. "What now?" Ron cracked a grin, his eyes sparkling.

"If you can manage it, we need you to sneak into the Slytherin-"

"What about Slytherin?" Interjected Hermione. Ali sat back down, turning and smiling at her friend.

"We're just talking about how horrible those stupid Slytherins are," Harry replied, smoothing over the truth. Hermione nodded and returned to the paper. Again Ali leaned to whisper to her male friends.

"Why do I need to sneak into that place? It's probably atrocious and full of..snakes and stuff." She shuddered at the mere mention of the reptiles.

"Because...okay, so we think Malfoy," Ron hissed the name as if it was venom in his mouth, "stole something of ours. We don't know what, but our stuff has been disappearing lately. Most importantly, Harry's invisibility cloak. We want you to knock him out and search his dormitory. So are you up to it?" Ali sat back slowly and turned to the Slytherin table. Malfoy sat, alone for once. He sat on the opposite end of everyone else, poking at his eggs and hardly touching his pumpkin juice. Ali felt a strange uncertainty about giving him the Draught.

"Well?" Ron prodded at her.

"So what, do I just slip it into his drink at dinner and..?" Harry nodded.

"It takes about thirty minutes to an hour to fully kick in. He'll be in his dorm by then."

"Well, jeez, that's nice and all. How am I going to get in there, though?"

Hermione flipped the page in the Prophet.

"Easy. You wear Slytherin robes and act like a lost student. Say you're new, a transfer from Beauxbatons and you just got here or something. Make up a french accent. Do your hair and makeup; they're stupid enough to believe you." Ali couldn't help but think how sly and cunning this plan sounded. Almost as if Slytherins themselves had come up with it. Awesome.

"I can do that. No problem." She cleared her throat. "Excuse moi, where is the Slytherin dormitory?" She mimicked the French accent almost perfectly.

"Sweet. You're good to go."

After breakfast, the four went to their classes. In Potions that morning, Slytherin and Gryffindor had to pair up with one another to brew a particularly difficult potion. Ali tucked her vial into her shirt, internally laughing; they were brewing the Draught of Living Death. However, the class would not keep their potions.

It just so happened that Professor Snape paired Ali up with Draco Malfoy. She felt a little bad about drugging him later, so she was semi-nice to the blonde.

Malfoy sneered at Ali as he walked over to her desk. That was all it took to drop Ali's mission of being nice to him.

"Hello, partner. Don't screw this up for me. Just sit there, look pretty, and let me do this." Draco squinted at her. Did she just call him pretty? She was probably being sarcastic, but..

"You may begin," droned Snape. Ali made her way to the supply closet, juggling everything in her arms. On the way back to her desk, she passed Ron and almost dropped the jar of moondew. Draco turned and swept down in time to catch it, scowling at Ali.

After they'd collected their ingredients, Draco leaned back on his stool, crossed his arms, and watched his partner work. She'd tied her long hair back, letting her bangs hang in front of her slightly.

Ugh, if she wasn't a filthy Gryffindor half-blood...I might think she's kind of pretty, he thought to himself.

Within the hour, the 'partners' had successfully concocted the brew. Draco handed it into Professor Snape and went back to the desk. The class ended and his partner was out of there faster than he could blink. What was that girl's problem? She acted as if she was about to commit a dirty act...

So that was the first chapter of my story...I hope you like it! I haven't wrote in a while and I'm a bit rusty but bear with me :)
Please review! The faster the reviews, the faster I update!