I wasn't planning to write this, but this idea hit me like a ton of bricks. Not entirely sure where I'm going to go with it, but stick with me.

Disclaimer: I do not own the plotline or characters of Harry Potter. I only own my original characters. All rights go to J.K. Rowling.

James Sirius Potter stretched leisurely as he walked past squawking magical portraits. "How'd you do on the Charms test, Rosie?" Rose turned red and clutched her books a little tighter to her chest. "I did well. And you?" James luaghed. "I bombed it. Lowest grade in the class. Mom's gonna kill me. Have you ever failed anything in your life, Rosie?' "Please just call me Rose, James."

As the two cousins walked past, the portraits suddenly fell silent. Rose stopped. "That's not natural." she said abruptly. "Why did they stop talking?" She went up to a portrait. "Are you all right?"

The portrait blinked. "Ah, Miss Weasley. Us portraits are fine, thank you. But something's not right in this castle... something is changing..." James' eyes lit up. "He's right! Something smells odd. Can you smell it, Rosie?"

Rose sniffed the air. Her eyes widened. "Something's on fire!"

The two raced down the staircase, following the scent of the fire. They then saw smoke billowing from the seventh-floor corridor. Rose stopped and hesitated. "James, we should call the teachers... James, that's a fire- James, wait!" James had bounded through the entrance, pulling out his wand, eyes sparkling with the prospect of adventure. Rose chased after him, pulling out her wand as well.

The smoke got thicker as they pushed through, but Rose used her wand to cleanse the air in front of them as they pushed through. They would have missed the source of the smoke if there hadn't been a sudden fresh blaze of sparks. The stopped and covered their mouths and noses, trying to see what was on fire. The fire suddenly lit the surrounding area. A statue of dancing trolls and a wall, but not a wall. A door...

James gasped through his sleeve. "I remember what this is!" he said, slightly muffled. "Dad told me stories about this place! He said it was called the Room of Requirement and would give you whatever you wanted! He said that it had been damaged during the Battle of Hogwarts and he was pretty sure it was broken, so he told me and Albus to stay away from it." Rose glanced at him incredulously. "And you actually listened to him?" James shrugged. "He didn't tell us how to get in."

Rose blinked. "It shouldn't be burning." she said slowly. "Mom said it was burned with Fiendfyre. Things burnt with Fiendfyre shouldn't be able to be burned by earthly fire again. How-?"

Suddenly, there was a dark figure in the not-doorway. A thin, tall figure stumbled through, coughing. It was hard to make out if it was male or female. It stepped through the doorway, one arm over her mouth.

James' mouth fell open. It was a girl. Most definitely a girl.

He could tell because she was insanely, inhumanly beautiful.

Her skin and hair was streaked with soot and grime, but it didn't matter. She was still incredibly breathtaking. Her dark scarlet hair hung past her waist, and she was very skinny, almost angular, but in a graceful, dancer-like way. She wasn't wearing a robe, but a pair of unintentionally ripped jeans and a sleeveless shirt. She had no visible wizardry material, but magic oozed from her pores. Even Rose was taken aback.

The girl coughed throatily into her elbow. She glanced up, and for the first time noticed James and Rose. Her eyes flashed in recognition, and she smiled at them. Then she dusted off her jeans, stamped out a small fire by her feet, and promptly strode past the two of them, disappearing into the cloud of smoke.

James, who had been caught speechless, immediately snapped back. "WAI-"

"Mister Potter! Miss Weasley!"

James wilted. "Crap- Professor McGonagall?" Rose shot him a death stare, then started coughing. "Professor McGonagall! We're here!"

After they had been safely delivered out of the smoke and taken to hospital wing, Professor McGonagall sat down by their cots. "Mister Potter. Miss Weasley. Please tell me-"

"We didn't set that fire!" James immediatel protested. Rose nodded. "He's right, Professor. We didn't set that fire. But we did see someone there. I think she probably did."

James looked up. "She didn't-" The girl couldn't have set the fire. She just couldn't have. It didn't seem right.

"There was a ver, very pretty girl we saw there." Rose said quickly, as if she needed to get it all out at once. "She had long red hair, was tall, and wasn't wearing a robe. She came out of the room the fire was in alone, and her hair and skin was covered in ash. I think she probably did it, but I've never seen her before." "Me neither." put in James, looking relieved.

McGonagall sighed and pressed the sides of her hands to her forehead. "Oh, dear." she said. "Oh, dear, dear, dear. She's come again."

Rose blinked curiously. "Who? Who is she?"

McGonagall sighed. "The enchantress." she murmured. "Andromeda-Leah."