This story is similar to my story Renata Lupin. After I wrote that one, I realized how much fun it would be to write another female Marauder story, and who better to do than Sirius? I can see the drama now...

Disclaimer: I do not own Harry Potter or anything in it.

Siri Black stood in front of the scarlet Hogwarts express, trying very much not to look like one of her family.

"Do not embarrass our family. We will find out if you have." Her mother barked. Siri looked away from the imposing Black matriarch.

"Yes mother."

Not a chance.

"We shall see you at Christmas. Come, give your Maman a kiss."

Siri refrained from wrinkling her nose and kissed her mother lightly on the cheek before giving her younger brother Regulus a hug.

"Will you write me?" he asked, looking up at her.

"Every week." she promised.

"I'll miss you Siri..."

"I'll miss you too, Reg. I will be back home before you know it."

The whistle blew on the train, and Siri rushed to get on. She found her way into a empty compartment and looked out the window to wave to her brother, only to find that her parents had already dragged him away. Siri frowned and sat down, disappointed. But her melancholy mood did not last long. She was away from her family until Christmas! Away from the stiff, horrid dresses, away from being a proper pureblood lady, away from Kreature, away from Grimmauld! She felt like giggling just thinking about it. She was free! She could do anything she wanted! Siri jumped to her feet, her adrenaline buzzing. She had no idea what she wanted to do, but she wanted to do it now. She slid the door open and skipped off down the hallway. She had just entered the next car when she came across her older cousin Narcissa.

"Little Siri!" Narcissa said in fake excitement.

"Cissy." Siri said plainly.

"Have you seen Bella around? She is a first year just like you this year."

"No, I haven't." And thank Merlin for that, she added silently. Bella was horrible. She would pick on Reg all the time, and once cut off all of Siri's hair while she slept.

"Oh well." Narcissa sighed. "Have you met my boyfriend, Lucius? He is just down there."

She pointed vaguely down the hall, where a blond fourth year was tripping a first year.

"So juvenile." Cissy huffed before going off to haul her boyfriend away. Siri, meanwhile, went to go help the boy to his feet.

"Are you alright?" she asked him, looking him over. He had messy black hair that stuck up everywhere, and wire rimmed glasses over his hazel eyes.

"Mfine." He grumbled.

"Good." Siri said with a single nod. "Then shall I help you get back at him?"

The pair of hazel eyes snapped up at her.

"Get back at him?" He asked.

"Of course. He's an evil little prick, isn't he? I can't say I think too much of him." Siri said, motioning in the direction the Slytherin's had disappeared.

"You would help me prank him?"

"Duh."

The boy smiled and stuck out his hand.

"My name is James."

"I'm Siri."

"Shall we go find a compartment to plan our revenge, then?" James smiled.

"My trunk is in one already down this way. Come on."

She led her new friend back to her place on the train, only to find that there was somebody else in it. He was a wiry boy with sandy blond hair and his nose in a book. He did not look up from it when they entered. James gave a loud, fake cough to announce their presence. The boy jumped and his book slid to the floor with a thump.

"Oh! Gosh, I'm sorry, I saw somebodies trunk, but no one was in here and I just thought I would stay in here for a little while, you don't mind do you? I can leave." He said in one quick breath.

"Hold your horses, nobody is booting you out." Siri said in a calming voice. "What is your name?"

"I'm Remus. Remus Lupin."

"Good to meet you. I'm James Potter, and this here is Siri. We are going to plan how to repay an upper year Slytherin for his rudeness. Want in?"

"I... I... Okay." He said tentatively. Siri could tell that it was the last thing he wanted to do, but seemed desperate to make friends. She sat beside him and put her arm around his shoulders. She felt him jump slightly at her touch.

"Don't you worry. We will make a trouble maker out of you yet." she teased him. He gave a small smile in return.

The three of them had fun concocting theoretical ways to get back at the Slyherins once they had learned some magic. Siri had many great pranking ideas, and sulked after Remus told her that it would be years before they had learned enough to preform most of them. She supposed they would have to start small.

They changed into robes as the ride drew on, and Siri was buzzing with excitement by the time the train pulled up in Hogsmeade Station.

"We're here!" She squealed, pulling the boys out of the train.

"Firs' years! Firs' years this way!" came a voice out of the fog. It was followed by a huge, hulking form.

"Wow..." Remus gasped. The giant man led them to a fleet of small boats on the edge of the lake and told them to get in, four to a craft. They climbed onto the seats, joined by a girl who looked as nervous as Siri was excited.

"FORWARD!" the man yelled when everyone was seated, and the boats jerked to life, gliding across the water. A collective gasp ran among them all when they traveled around the band and the castle finally came into sight.

It was the most magnificent thing Siri had ever seen. It didn't look dark and drafty like Grimmauld, but bright and cheerful, mysterious and- well, magic. She was bouncing up and down on the balls of her feet by the time they reached the entrance hall. They were met by a stern, imposing woman who introduced herself as Professor McGonagall and explained to them about the houses and point system before leading them inside. Siri was certain that she was not the only one who gaped upon seeing the stunning visage of the Great Hall. Upper year students already sat at the long, gleaming wooden tables that supported golden plates, platters and goblets. Hundreds of candles floated above their heads, and the enchanted ceiling glittered with the stars of the night above.

The group of first years stopped in front of the head table, where a patched and dirty hat sat upon a stool.

"When I call your name, please come and the Sorting Hat will place you into your houses." Professor McGonagall said, picking up the hat in one hand and reading off of a scroll in the other.

"Anderson, Wesley!"

A timid boy went on up and sat down on the stool trembling. The hat seem to come alive, and muttered where the others could not hear before shouting, "HUFFELPUFF!"

There was a cheer as Wesley got up to join the yellow and black table.

"Black, Bellatrix!"

Siri sneered as her prim cousin walked to McGonagall and sat down on the stool as if she were a princess with her nose upturned. But she did snicker softly when the hat slipped around her cousin's eyes, ruining the dignity she had tried to display.

"SLYTHERIN!" The hat called almost immediately. Bella gave a small smirk as she went to sit down.

"Black, Siri!"

Siri felt James' head snap toward her, his mouth agape.

"You are a Black?" He asked. She was too ashamed to respond. She just looked down, and went on up to sit on the stool. The Sorting Hat was lowered onto her head, and a voice started to whisper in her ear.

Not an ordinary Black, are you? No, quite loyal to your friends and independent to your family... I daresay they would give you the term 'blood traitor.'

"I don't care." Siri thought back to him.

No, I can see that you don't. You are a very brave lass. You would be happiest in...

"GRYFFINDOR!"

Siri smiled larger than she ever had in her life as the hat was taken off her head. There was very little clapping, most people where muttering and whispering to each other. A Black? In Gryffindor? It was unheard of!

Siri didn't mind. She skipped off to her new house happily, pretending not to notice the bewildered stare most of her housemates gave her. She did not even bother turning to look at the Slytherin table, she knew they would all be staring daggers. She would have to watch her back.

Soon she was joined by a red-headed girl named Lily Evans, who was a muggleborn. Siri could tell that she was going to like her. As more of the first years were sorted, Remus joined them, looking relieved, and later a chubby faced boy whose name was Peter Pettigrew. Directly after him, James was sorted, and sat in the seat across from Siri.

"You didn't tell me you were a Black." he said with a slight pout.

"I'm sorry." Siri said, casting her eyes down. "I just... didn't want anyone to know."

James seemed content with the apology.

"I don't blame you. Don't worry about it." He told her.

Lily elbowed Siri.

"That is my friend Severus!" She whispered in her ear. Siri turned to see a pale faced boy with dark hair sit under the Sorting Hat.

"SLYTHERIN!" It cried out after a minute. Lily looked disappointed, and Siri saw Severus give a small frown in their direction before going to join the snakes. Siri pursed her lips. Slytherins were not the nicest of people from her experience. But before she could say anything about it to Lily, Headmaster Dumbledore stood up and announced the beginning of the feast. Food instantly appeared on the plates before them, and after a moment of looking at it all in awe, Siri began to pile the food up on her plate.

When she was too stuffed to move, the feast ended, and all of the first years followed the prefects up to the Gryffindor common room. Siri smirked at Lily's amazement of the moving pictures, and pretended that she was not in as much awe as she was at the castle's size.

They were given the password to the portrait hole - which was hippogriff- and then directed to go straight to their dormitories. Siri frowned and gave both James and Remus a hug.

"I'll see you guys in the morning." She said as she pulled away and waved to Peter.

"Night Siri. See you tomorrow!" James grinned as they parted. Siri went into her dorm and snagged the bed next to Lily's.

"You like James, don't you?" The red-head asked. Siri felt her face heat up as she blushed.

"What! No! I mean, yeah, but we just met!"

Lily just gave her new friend a knowing smile, and they both went to get ready for bed without another word.