I sat in the library reading at Grimmauld place. The war had just ended a few weeks ago although it only felt like a few hours that it finishd. Through the war she lost everybody that she cared about, Sirius, Remus, Ginny and not to mention Harry just to name a few. I was trying to find a way to reverse the changes, to go back in time till just before Voldemort attacked the school. After hours of reading I came across a book that I had never seen before. The book was called A time travellers guide to the unknown. I flipped to the first few pages till I saw the chapter entitled How to arrive at your destination. on page 130. I flipped through the page mentioned and started reading silently.

As most wizards know, awful things happen to people that try to meddle with time. Only the desperate travel through time for their own reasons. There can be unforseen consequences that can result and you could end up changing things for worse instead of better. If you find you need to travel through time there is a simple incantation that is needed to send you back to where you want to go.

I looked at the incantation and read it allowed. "Accipe me quo ego maxime necessaria praeterita mutare melius."

I felt a strange feeling inside me. I looked around slightly panicked, wondering what was going on. I closed my eyes tightly until the feeling stopped. I slowly opened my eyes and looked around dissapointed. I was still in the same place I started at in the library in the house of Black.

"I should have known it was too good to be true." I said to myself, getting up and putting the book back on the shelf.

I left the library and grabbed my cloak and left the house for a walk, it had just started getting dark and it was a full moon. I had barely got halfway down the street when I heard something behind me. I quickly turned around as I was pulling out my wand.

"Well, well. If it isn't Potter's little mudblood."

"Death Eater scum." I said to them, looking at the two death eaters in their cloaks and masks, with what looked like a dog standing in front of them.

"Now, now, mudblood, it would pay for you to behave yourself unless you want to be on the wrong end of our little friend Greyback here, now that wouldn't be good now would it."

It only took a few seconds for me to act as soon as they said that and I did the only thing I could think of doing against a werewolf. I ran. I ran as fast as I could, but I could here Greyback catching up to me. All of a sudden I felt a sharp pain in my leg, falling to the ground in pain I screamed. I grasped at my leg only to feel the same feeling I did back in the library. I closed my eyes, feeling dizzy, knowing I wouldn't be going anywhere, I fell backwards and hit my head on the pavement making me feel like I would throw up. It was a shock when I opened my eyes.

I looked around and saw I was in Hogwarts. I tried standing up but my leg was too sore. I looked around frantically, hoping to find some help. I saw someone a corridor up.

"Hello, hello, please help me." I called out.

"Who's there?" They called out coming closer to me.

"Please help me." I said again.

They walked right up to me, their wand lit. They saw my state and looked shocked but snapped out of it quickly and helped me up. They took me to the infirmary slowly and helped me into a bed before going into the office and getting Madam Pomfrey.

"Oh my dear. What happened to you?" Madam Pomfrey asked.

"I need to speak to Professor Dumbledore."

"Not right now you wont. First your sleeping, you can speak to the Professor in the morning." She said sternly, sending the prefect on his way and walking off to get a potion and making me drink it. The sleeping draught put me to sleep straight away.

When I woke up it was morning. I slowly opened my eyes and sat up slowly.

"Ah, your awake now I see." said a voice I recognised from beside me. I looked around quickly and saw Dumbledore looking at me quite sadly.

"Professor, what is going on here?"

"What happened to you dear girl, what do you know?"

"I was running, I was being chased by Fenrir Greyback and the next thing I know, I'm here."

"How did you end up here?"

"I cast a spell sir."

"What did the spell do?"

"I cast a spell to take me back to help put everything back to where it should be, but I don't think I can say anything else here sir. I don't want anyone overhearing us."

Dumbledore flicked his wand to put up a silencing spell. "There, now no one can hear us. Please continue."

I told Dumbledore all that I knew about the war and what happened up till the point of my appearing in the corridor in hogwarts. "What year is it sir?"

"1978."

"What! I was only meant to go back a few weeks, not twenty years."

"What year are you from?"

"1998."

"Ah, I see your surprise. You would have been in seventh year is that right?"

"Yes, sir."

"Then you can continue to be in that year and do your studies. You will be sorted tonight at dinner."

"Sir, will I ever be able to go back home?"

"I'm sorry dear, but yoou never belonged in that time. In fact your right where you belong. You were never meant to be in that time."

"What do you mean by that?"

"Your parents thought you were a squib so they sent you away to live with muggles, using a spell to try and prevent you from ever finding your relatives, to not know your heritage. It sent you forward in time."

"Then if I belong here, who am I related to?"

Dumbledore conjured a mirror and hovered it at the end of the bed. "Why don't you tell me."

I looked at myself in the mirror. I couldn't believe what I saw. My hair was black, trailing almost half way down my back in curls and I had grey eyes that made me think I could only be related to one family. "I'm related to the Blacks."

"Yes indeed my dear. You are in fact the twin sister of Sirius Black and your name is Rasalas Cassiopian Black."

"What?" I was struggling to take all the information in.

"How did I get back here if I wasn't meant to find any of my family?"

"There is only one way it would work Miss Black and that would be if all remaining members of that line are dead." He said sadly looking at me.

"Maybe it would be best for you to stay in here till dinner. I will send someone in the collect you when it is almost time."

I nodded, not able to say much else.

I was lying in bed and must have fallen asleep as next thing I knew I was being awoken by a prefect.

"Hey, wake up. Get moving or we will be late to the great hall."

I look up and see the prefect that found me last night. I took a good look at him as I sat up. He had light brown hair and blue eyes, quite tall and muscular by the looks of him.

"Alright, I'm coming." I grumble as I sit up and pull myself off the bed.

"Are you new here?"

"Yes I am. Can I ask your name?"

"Call me Avery. Why don't you tell me your name?" He asked as we walked out of the infirmary and down to the great hall.

"Call me Black." I said smirking as I pushed the doors open. Silence filled the great hall as I pushed it open, every turned to look at me.

"Ah, just who we were waiting for, please make your way to the front." I started walking up as Dumbledore continued talking. "I am pleased to welcome someone here who should have been here years ago, but unfortunately could only come here now." He grabbed the sorting hat from the podium and waited for me to come up to the front. "Now we will see where our new student will go, please come and put the sorting hat on Miss Black and we will see where you belong."

At being called Miss Black I heard everybody start talking around me. Dumbledore called for silence and out the hat on my head.

Ah, if it isn't a Black, if I am correct Sirius Blacks sister. Well, I think there is only one place to put you from what I read in your mind. "GRYFFINDOR."

Dumbledore took the hat and I slowly made my way to the Gryffindor table and sat down at the end of the table.

"I'm sure you will all help Miss Black to settle in here at Hogwarts for this year. Now lets eat."

I didn't really feel hungry and I felt all eyes on me and hear all the whispering going about. I was staring at my plate when I heard someone clear their throat behind me. I turned around and saw someone standing there with red hair and green eyes.

"Hi, I'm Lily Evans, head girl here at Hogwarts." She said holding out her hand. I shook her hand politely. "Do you mind if I sit?"

"Go ahead." I said quietly.

"So what made you come here to Hogwarts?" Lily asked kindly.

"I actually came to find my brother."

"Does he go to school here? Or are the Blacks here cousins of yours?"

"I couldn't tell you if I tried. I couldn't have a clue, can you introduce me to the Blacks here? Maybe they might be?" I said, not wanting to sound like I know anything.

"Sure come on, do you know your brother's name?"

"Yeah but I think I should ask them first before I say anything, I don't want false hope." I said as Lily lead me down the table to where the Maurarders sat.

"Black." Lily called as we got to them, looking disgusted. "Stop shoving your face for a second and say hi to the new student."

"Hi." He said smiling. "So how close are we? First cousins or second?" He said with a friendly grin.

"If you are who I think you are, that would be neither."

"What do you mean?" He asked, his smile fading.

"Would you happen to be Sirius Black?" I asked, knowing full well who it was.

"Yes I am Sirius, thanks for asking." He said laughing.

"Well, in that case. Hi Sirius Black, my name Is Rasalas Cassiopian Black. Your long lost twin sister."

All the maurarders dropped what they were doing, Sirius' mouth hanging opened before opening and closing it, looking like a fish.

"No, you can't be." He said shaking his head. "My sister died at birth."

"Well as you can see I'm very much alive and sitting right here."

"No you can't be."

"Maybe we should go up and talk to Dumbledore then?"

Sirius nodded, still in shock and walked up to the head table with me.

"Dumbledore, may we talk to you for a quick minute?" I asked.

"Excuse me Minerva, I'll be back in a tick." He said, getting up and leading us into a side room.

"I guess it is a bit of a shock for you Mr Black, seeing your sister after all this time."

"No, she died."

"Sit down Mr Black and I will explain a bit about what happened." He said as he conjured a couple of comfy chairs.

Dumbledore told Sirius all that he told me in the infirmary. Sirius sat there taking it all in.

"So, it is true?"

"Yes, it's true."

Sirius got up and threw his arms around me, pulling me close into a hug. "I can't believe it, my sister." He said, breaking into tears as he pulled me into a tight hug. I couldn't help but break into tears as well. I always wished I had a sibling. I hated growing up an only child. Now that I found out I had a twin, expecially someone that I was close to, it was so overwhelming for me.

"You may go back to your seat in the great hall if you wish Mr Black. I need to speak with Miss Black for a minute."

Sirius nodded and walked out of the room, with tears still glistening in his eyes. Dumbledore waited till Sirius was gone before he spoke.

"Are you going to tell them about Greyback?" He asked kindly.

"Not quite yet, I think I would prefer to wait a bit before telling them."

"Alright you may go."

I go back and sit at the table beside my twin brother and see James and Peter staring at me.

"So it is true." James said quietly. "Padfoot has his little sister back."

"I'm not his little sister. I'm the same age as him." I said rolling my eyes.

"Well come on. Lets go to the Gryffindor tower. I think I need to sleep." Sirius said. "Been a long day." He looked like he was about to start to cry again, the fact of finding me was slightly overwhelming for him.

James and Peter nodded and we silently walked up to the tower together and walked into the common room after telling the fat lady the password.

"I'm going to go see my friend in the infirmary tomorrow morning. Would you like to come with me and meet him?"

"I would love to." I said smiling.

I gave my brother a hug and walked up to the girls rooms and fell asleep the second my head hit the pillow.