Title: The American Auror

Summary: The Order accepts a young American Auror, whose only mission in life is to slay the Dark Lord Voldemort. But darkness runs in her family, more so than she thought. Will this darkness take over her, and turn her into the one thing she never believed she would become?

Genre: Romance/Action/Adventure/Horror/Crossover

Rating: M – Mature

Disclaimer: I do not own Buffy the Vampire Slayer or Harry Potter

Chapter One…Buffy Arrives To the Grimmauld Place

The twenty-nine year old woman glanced down at her wristwatch. It was ten-forty-two. Crap. She was supposed to be there at eleven o'clock.

'There' being her new job.

She sighed dramatically, glancing out the window of the taxi she was in. She couldn't believe she was doing this. She couldn't believe she had actually been contacted and chosen for this. It was so…unbelievable.

Buffy Summers was an auror. It was her job to protect the wizarding world from things like, for example, Death Eaters, and other evil things. She was one of the top most powerful and best aurors alive. Well she had been, when she'd been in America. Now she was in England, and she was most likely going to be very disliked here. The English Wizarding World didn't very much like the American world of magic. Why? She had no clue. It was just the way things were. Maybe it was a power thing. She didn't know.

But that hadn't stopped her from getting this job.

Oh, how shocked she'd been when she'd gotten a visit from the one and only Albus Dumbledore. He had asked her if she were busy for the next few months, and if she would like to join in a secret origination against the greatly feared Lord Voldemort and his followers.

Of course, she'd accepted.

She didn't like to use the word hate, as it had a strong meaning, but oh how she hated the Dark Lord, with a great fiery passion.

He had killed her parents.

See, her mother and father had been aurors as well, and had traveled to England to help out. This had been before the Dark Lord had been killed by a single baby boy. They found his hiding place, them and a few others.

They were ambushed, killed instantly.

Now it was Buffy's mission to kill him, no matter the costs.

But, her first job was to help protect The Boy Who Lived, the infamous Harry Potter.

She sighed, and pulled out a mirror from her purse. Glancing into it, she saw that she had dark circles under her hazel eyes, and her long honey-blonde hair was a mess. Her usually tan cheeks were pale, with no color in them, and the long shell-pink dress she wore was wrinkled from all the traveling.

She looked like hell.

Sighing again, more in frustration at the fact that she would be arriving looking like this, she shoved the framed glass back into her purse, and looked back out the window.

The taxi stopped. "We're here, lady."

Buffy's eyes narrowed. She may not be twenty or twenty-one, but lady was off in the distant horizon, thank you very much.

She opened the door, going round to the other side to grab her bags.

The taxi sped off once she'd shut the door and paid, not even helping her with the luggage.

Jerk.

The slim blonde hauled her bags over her shoulder, and glanced at the houses she stood in front of.

He said Grimmauld Place, number thirteen, she thought with a frown.

There was only twelve and fourteen.

Buffy sighed, fishing into her purse for the forgotten paper Albus had given her.

Glancing at it, she read it over again: Grimmauld Place, number thirteen

Looking up again, she gasped.

In between the two houses, was a third. Number thirteen.

She arched a thin brow. Weird, but good for a secret place.

She walked up to the door. Knocked on it.

No one came at first, then it slowly opened an inch. A small, plump woman with a shock of bright red hair looked out at her. "Ah. You must be Miss Summers! Please, come in!"

Buffy stepped inside, dragging her bags with her. "Please, it's Buffy."

The door closed behind her, and she got a chance to look round. It was rather dreary and morbid looking, all done in blacks, dark grays, and emeralds. Even the wood doors and tables and chairs were dark in color.

"Come, come dear. I was just fixing up some lunch."

Buffy followed the woman into the kitchen.

Inside was a bunch of people. Two men, one woman, and four teens. Two of the kids were twins.

But they weren't what caught her eye. No it was one of the men. The man with the longish black hair, handsome but rather gaunt face, and piercing gray eyes.

Sirius Black.

Buffy, unsure of what this meant, backed away, grasping hold of her wand. "Where's Albus? Why is he here?"

. Sirius looked at her, fear showing dully in his eyes, along with a little bit of anger. "I could ask you the same question, luv."

Buffy was about to retort when Albus walked in.

"Oh dear." He looked between the two adults, and said, "I should have told you both; I have asked an auror from America to come. She will help protect Harry."

"You never said you harbored a murderer here!"

Sirius's eyes narrowed but glazed over. "I'm innocent. I was framed."

Buffy stared at him, not believing, then looked to Albus, who nodded. "Yes, yes he is."

The blonde looked confused, and tilted her head to the side. "But…he was the Secret Keeper!"

Sirius shook his head. "No, I switched with Peter Petigrew before Voldemort attacked." Everyone except her and Albus flinched at the name. "He betrayed them, not me. James and Lily were my friends, and I would never have handed them over to him. I would rather have died."

He said this with so much emotion, Buffy had to believe him. Slowly, she lowered her wand. "Why…why haven't you gone to the Ministry? Told them…" But she knew they wouldn't have listened. They would have just arrested him again.

He nodded, as if sensing her thoughts. "Wouldn't have worked." He grinned suddenly, and turned to the man beside him. "To tell you the truth, I thought all aurors were pompous gits. Never knew they came this young and pretty. Or are they all like this in America? I've heard that everyone wants to be thin and beautiful there."

Buffy frowned, trying to come up with a good retort. Not finding one, she glared. "Ok, that's enough."

"And that accent!" he continued. "You would think---"

"Oh, do shut up."

"I mean, come on! And do they all wear such revealing clothes all the…"

Buffy glanced down at her dress. Maybe the neckline was a bit low, but the skirt of the dress reached the floor! She sniffed, insulted. "I'm leaving now. Have fun with your jokes while you can."

She grabbed her bags and stalked out of the room, miffed.

Molly followed.

"Oh, my dear, don't pay any attention to him. My own opinion is he was locked up in Azkaban so long, he forgot how to treat a lady. Don't take anything he says personally. He most likely merely thinks you're attractive and doesn't know how to show it properly. Oh, and your room is at the end of the hall upstairs, not in the middle but to the right. There will be a meeting at twelve. I believe they will want you there. Would you like some help unpacking?"

Buffy shook her head. "No, but thank you for asking. I think I should be able to manage on my own."

Bidding the woman goodbye, she followed her directions and walked into the room that was to be hers. It was done in the same shades as the rest of the house. She was starting to feel like she'd ended up in Dracula's castle.

Buffy started unpacking. This was going to be a long few months.