A/N: I updated quickly! Aren't you proud of me? Please Review and tell me what you think! Also I want reader's opinions on how this story should go.

Set in Harry's fifth year, but changed to include Arianna and how her presence changes the events.

Set in Harry's sixth year, but If Sirius lived.

Please tell me what you think!

Disclaimer: I don't own HP

Chapter 8 – New Enemies

Arianna landed gracefully from their portkey ride and immediately felt someone grab her shoulder. She glanced behind her to see Anna using Arianna to steady herself. Ari glanced down and noticed Tonks was sprawled all over the ground. On impulse, she stuck out her hand to help her cousin, but quickly withdrew it and mentally scolded herself. She was supposed to hate everyone here! It was the only way she'd get sent home! She made herself glare coldly at Tonks.

'Where is this headquarters you're supposed to be taking us to?' She said, looking around at her surroundings, 'This is a vacant lot, in case you haven't noticed.' Tonks scowled at her and grudgingly stuck a hand inside her robes, and withdrew a small scrap of parchment. She handed it to Anna and gestured for them both to read it.

'Memorise it.' Her good mood had lessened considerably since Arianna had started acting completely horrible to her. Arianna glanced down at the scrap of parchment in her mother's hand.

The headquarters for the order of the phoenix may be found at number 12 Grimmauld Place.

Arianna glanced at the houses in the street in front of her. The numbers seemed to jump from number 11 to number 13.

'Is this some kind of joke?' She hissed at Tonks.

'Think about what you've just memorised.' Tonks growled back.

Ariannna stared back at the street, thinking hard about the note she had just memorised. To her surprise, a house seemed to materialise right in front of her, forcing its way between numbers 11 and13. A small gasp from beside her told that her mother was seeing the same thing.

'Come on, let's go inside.' Tonks lead them across the road and up to the front door of number 12, where she paused.

'Now when we go inside you have to be very quiet, for two reasons. 1. Everybody is asleep, and 2. There are certain things in this front hall that we don't want to… wake up.' Arianna shot her mother a questioning look, but she just shrugged and allowed Tonks to lead them inside. Arianna glanced cautiously around her new surroundings, but she couldn't see much by the dim light of Tonks' wand. All she could tell was that It was a stone corridor with several portraits lining the wall. Tonks lead them slowly down the corridor. They were about halfway to the end, when Arianna tripped. She flung her arms out, desperate to find something to steady herself on. Her hands felt a worn, moth-eaten and fabric and she grasped on tight. Immediately a blood-curdling shriek rang through the silent corridor, shattering the silence.

'FOUL, LOATHSOME HALF-BREEDS! BESMIRCHING THE HOUSE OF MY FATHERS AND INTERUPTING MY SLUMBER! MUDBLOODS AND BLOOD TRAITORS-' Arianna jerked her head upwards, towards the source of the noise. She realised that the source of the commotion was a portrait, a life sized portrait of a pale, handsome woman with dark eyes and black hair, pulled back in a cap. She realised with a start that that the worn material she had grabbed onto had in fact been curtains. Curtains that had been hiding this woman's portrait from view, and it was now evident why.

'MUDBLOODS IN MY HOUSE! DIRTYING MY GREAT FAMILY'S ANCESTRAL HOME WITH THEIR-'

'Now look what you've done!' Hissed Tonks, desperately trying to pull the curtains closed again, but failing dismally.

A door banged open at the end of the corridor and a dark figure hurtled towards the hangings. This person, Arianna noted, was obviously stronger than Tonks because they had the curtains closed within a few seconds. It was only when the figure turned to face them that Arianna recognised him.

Black, shoulder length hair, now tousled from sleep and blue-grey eyes, once alive and twinkling with mischief like Arianna's, but were now saddened and haunted, a look that had no doubt come from spending twelve years in Azkaban. Arianna's father, Sirius Black. Arianna felt her jaw drop open. She'd known that she'd have to meet him sometime, but she had at least expected a little warning beforehand. Arianna readied herself, and then looked up, prepared to meet her father's eye, but Sirius wasn't looking at her. He was staring at the person next to her.

'A-Anna?' He stuttered. A look at her mother told Arianna that Anna had silent tears streaming down her face.

'Hello, Sirius.' Anna tried to say the words calmly, but as soon as she finished she broke into desperate sobs and ran forward, burying her face in Sirius' chest. He awkwardly put his arms around her and comforted her until she finally stopped sobbing. She glanced back at Arianna, who was awkwardly standing next to Tonks, not really knowing what she was supposed to do. Anna turned back to Sirius.

'Sirius, this is my,' She paused,' OUR daughter, Arianna.' Sirius' head jerked towards where Arianna was standing.

'What? No – I mean... It's not possible! I mean – Dumbledore said YOU were coming, but he never said anything about – Oh Shit!' Arianna glared at Sirius.

'Well it's obvious you don't want me.' She spat, 'I'm sorry I was ever born if it inconveniences you so much!' She turned to Tonks, 'Can you take me to wherever it is I'm supposed to be staying? I'm obviously not wanted in his majesty's presence.' Tonks looked torn.

'Oh well... Maybe you should just try to talk-' Arianna cut her off.

'Please? I'm really tired! I can talk to him in the morning!' She gave Tonks her best puppy-dog eyes look, and Tonks reluctantly nodded.

'Okay…Come with me. Locomotor trunk.' She led Arianna down the rest of the corridor and through the door, levitating Arianna's trunk in front of her. On the other side of the door was a large room with several doors leading off to one side and a large staircase on the opposite side. Tonks lead Arianna up the stairs to the second floor landing where she paused.

'Okay, all of you, OUT.' She commanded. Arianna shot her a confused look but Tonks ignored her.

'Come on guys, I know you're there! If you come out now, I'll forget to mention it to Molly that you were eavesdropping again.' Almost immediately, six teenagers immerged from various hiding spots along the landing. Even though it was dark, Arianna didn't fail to notice that four of the six had flaming red hair.

Guys,' Tonks addressed the teenagers, 'This is Arianna Black. Arianna, this is Ron Weasley, Ginny Weasley, Fred Weasley, George Weasley, Hermione Granger and Harry Potter.' Arianna gasped. She hadn't heard of the Weasley's or Hermione before, but she definitely knew who Harry Potter was. She was surprised to realise that all six of them were glaring at her. Tonks seemed to be surprised by it as well.

'Well... Uhh… Boys, go back to your rooms. Ginny, Hermione, Arianna will be staying in your room. Can you show her where it is?' The red-headed girl and the girl with the bushy brown hair both nodded, but they didn't move. Finally the brunette stepped forward.

'Hi, Arianna, I'm Hermione. Our room is this way.' She led Arianna down the hall to the door at the very end. Ginny reluctantly trailed behind. Hermione showed Arianna into the room. It was a plain room, with plain stone walls and three beds, two of them unmade with trunks sitting at the ends of them.

'You can sleep in that bed.' Said Hermione, gesturing towards the third bed. Arianna nodded and without a word, went over to the bed and started pulling down the covers. She was just changing into her pyjamas when Ginny spoke.

'Who the hell do you think you are?' She hissed. Arianna turned to look at her.

'What the hell do you –'

'Sirius.' She hissed angrily, 'We heard you from the landing! You just blew up at him! It isn't his fault! He never knew about you, and you just made everything out to be his fault! He doesn't deserve that!'

'You don't have any right to talk to me like that! You don't know anything about me!' Arianna hissed back. Ginny was about to snap back a reply, when Hermione butted in.

'You have to understand, Arianna! He only just found out about you! He just suffered a great shock! He's probably really confused right n-'

'Since when did you become the expert?' Arianna snapped back. Hermione looked hurt and Ginny was looking ready to kill.

'Come on, Hermione, She's a waste of our time. Let's just go to bed.' She then turned on her heal and marched back to her bed. Hermione shot one last pained look at Arianna before following Ginny's lead. Arianna, realising that the fight was over, jumped into her bed and tried to sleep.

A/N: Okay I know this chapter isn't fantastically written, but I wanted to update today and I'm really tired. Please review and tell me what you think! I'm still not getting many reviews! Remember to vote for either option a or option b!