PallaPalla-Chan
Rated PG13
Disclaimer - No, I do not own Sailor Moon or Harry Potter, they belong to their respective owners.

I'm sure that this chapter is unexpected, I plan on finishing all of my fanfiction at some point, but I finally figured out where this is going. Took me a long time... anyhow, eight pages for you guys. Please enjoy!

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Serenity was just finishing up another butter beer when Setsuna walked into the three broomsticks. Setsuna took a seat at the barstool next to her princess and gave her a smile. "How are you doing hime?"

Serenity gave Setsuna an annoyed glare before she looked down at her empty butter beer. "I'm feeling old now. I went into the Hogs Head to see what it was and they offered me fire whiskey!"

Setsuna took Serenity's hand in hers and gave it a friendly squeeze. "Don't worry, Professor Snape will have that potion ready by tomorrow afternoon."

"Tomorrow afternoon! I'm going to have to wait that long!" Serenity's shrieking caused Madam Rosemerta to give her a 'quiet down' glare which calmed Serenity considerably.

"I'm sorry Serenity, but it's the best that he can do. Just be happy that he's making the potion. That man seems a nasty sort. I'm surprised he agreed to make the potion at all." Serenity listened to Setsuna's words and suddenly felt guilty. Her teachers were being forced to cover up for her. She'd have to thank Professor Snape for his kindness. Kindness she didn't think he possessed after her run in with him in his classroom. She heaved a great sigh and spoke, "Would you mind if we went to the inn, I'd like to get some sleep. I've already eaten." She lied about eating. She didn't have an appetite after all that had happened that day and didn't want to have Setsuna guilt her into staying in the Three Broomsticks any longer. Especially with the look of disapproval she was still getting from Rosemerita for her outburst that had just occurred.

"That sounds just fine." Setsuna stood and paid Rosemerita before the two walked back to their inn in the growing dark.

The two went to their separate rooms and Setsuna bid Serenity goodnight giving Setsuna a depressed nod in reply. She was tired, and upset by the days events and sleep seemed the only solution at the moment. She collapsed onto her bed as soon as she'd entered the room. The soft bed felt wonderful, warm and inviting but she sat up and let herself give a weary look around the room before she moved to a small suitcase that Setsuna and her had packed before they had left. She grabbed a white silk night gown from it and she quickly changed from her robes into her selected nightwear. She then pulled back the covers and turned off the lamp next to her bed before she crawled into bed for her night of much needed sleep.

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Usagi awoke to the sounds of loud barking. She groaned loudly but looked around her room in annoyance, searching for the source of the noise.

She slowly awoke a bit more as she observed that the noise was coming from her open window not her room as her sleepy body had initially thought. She slowly made her way to the window and saw down below a large dog being fed by one of the shops' cooks. The dog had been barking in happiness it seemed. She was just about to go back inside to lay back down in her crisp white sheets when she did a double take. Wasn't that the dog that she'd seen Harry and company with? The large one they said they were getting out of the castle before they were caught? She was certain it was!

She quickly went and grabbed some robes and pulled them on and she barely had her socks and shoes on before she was out the door and downstairs. She walked briskly across the street and saw the large animal swallowing a piece of bread. The shop owner seemed to be talking to another person about the dog but Serenity couldn't really hear the conversation, nor did she care to. She just stooped down in front of the large black beast and pet its dirty coat.

"Well, well, well. We meet again. I guess Harry got you out of the castle and into the streets." She cooed.

The dog seemed to observe her before wagging his tail. "Well, at least you recognize me like this." Serenity stood up and patted her leg. "Come for a walk for me Snuffles?" The dog seemed to look toward the shop in hopes it might get another scrap before he walked up next to her and nuzzled her leg before the two began to make their way down the street.

They walked up to a nearby bakery and Serenity told Snuffles to stay before she walked in and bought two pastries. One for herself and one for her new animal friend. She walked out and held it out for her friend who took it gratefully.

Serenity looked to her right, wondering where to go next when she saw a bench. She quickly headed over to it and sat down to enjoy her pastry. Snuffles padded along behind her and sat down at her feet.

Serenity finished her pastry and was still at a loss as to what to do. She could go back and see Setsuna and ask her about the potion, but she knew the time guardian would just find her. She decided to just stay put and watch her new friend. He seemed antsy like he was waiting for something to happen. He wasn't very dog like at all. When she had given him his pastry he didn't want her to put it on the ground for him. She wondered why Harry had wanted to get rid of a dog like this. Why not keep it as a pet? Then a brilliant idea formed. She'd ask Setsuna to let HER keep the furry animal! She grinned ear to ear at this fabulous thought and leaned down and hugged the startled creature before she stood up and began to walk toward the inn.

"Come on Snuffles! Lets get you cleaned up so we can take you up to Hogwarts. I bet Dumbledore wouldn't mind me keeping a dog up at the castle instead of a silly owl or a cat." Snuffles seemed hesitant but then began to follow her reluctantly.

Once back in her room Serenity drew a bath and opened the door for the animal. "Bath time!" Serenity looked down at her clean robes before she decided it best to change into some pants and a t-shirt. She quickly changed, not noticing the dog turning his head as not to watch her undress before she lead Snuffles into the bathroom. Remembering how much Luna hated baths and she had sense to close the door before she looked down at her victim. "Now, are we going to do this the easy way, or the hard way?" She said looking at the tub to the dog.

Snuffles looked at her then at the steaming bath. The dog seemed to contemplate wither he wanted them to both get wet in the process of him getting in or if he wanted to go in willingly. A very un-dog like action. But Serenity figured most wizard dogs were like this. After all Hermione's animal Crookshanks was smarter than your average cat.

Snuffles decided against the extra work and jumped willingly into the tub, sloshing only a bit of water over the side of the over filled tub.

Serenity smiled and grabbed a tiny complementary shampoo and flicked her wand at it and let the washing commence. She'd learned this trick from her mother when she was a young girl.

Snuffles was washed in no time, with little fuss. The only part Serenity washed herself was his face to make sure that nothing got into his large gray eyes. "There we are!" Serenity said as she unplugged the tub and let the water drain out, leaving Snuffles rather tiny looking now that all his fur clung to his skeleton like body.

Tears came to Serenity's eyes. "Oh Snuffles, you're so thin." She quickly began drying the animal and he looked much cleaner and healthier.

"We'll have to get you some decent food." Serenity said certainly. "And make sure Setsuna approves of you so she'll talk to Dumbledore."

"Approves of what?" Serenity's head snapped up. She heard Setsuna outside the bathroom and Serenity used a quick charm to finish of Snuffles' drying and she opened the door a crack to not allow her friend to see the dog she'd acquired. "Well, I found something." She started. Setsuna nodded and motioned for Serenity to open the door all the way.

Serenity did so in uncertainty and revealed her new pet. "He's very well behaved!" She started before Setsuna looked down at the dog with cat like eyes before she turned to her princess. "You may keep him until the end of the year." She stated firmly.

Serenity grinned. "Thank you! I miss Luna so! It'll ne nice to have an animal to talk to... or sort of talk to. I don't think Dumbledore will mind him at all." She rambled on, leaning down to scratch his ears.

Setsuna nodded before speaking again. "The potion is ready. You can take some and we may head back to school. The professor is in my room." Setsuna said quietly. All the while starring at the black dog.

"We? Won't you be going back to the time gates?" Serenity inquired.

"Iie, I shall be returning to the school with you. Dumbledore has asked me to become your defense against the dark arts teacher. I do believe you haven't had that class yet." She said with a mischievous grin.

"You were keeping this from me weren't you?" Was Serenity's agitated reply.

"Of course." Setsuna said smiling at her princess and leading her out of the bathroom. "Now get changed to go back to the school and change into the clothes you wore before, if they're too large you'll look silly."

Serenity nodded and waited for Setsuna to exit the room before she changed into her tighter school robes. "Arg, I can barely breath in this." Serenity said to Snuffles once he had come out of the bathroom (he hid in there until after she'd changed). "I can't believe my age caught up with me like this, it's such a hassle. But I guess it's better than telling everyone I'm actually a 1,009 year old Moon Princess eh Snuffles?" The dog seemed a bit confused before she left the room, leaving him locked up inside.

Inside the room Snuffles, otherwise known as the escape convict Sirius Black, was wrestling with himself. Should he try to leave or go with this Serenity girl? Harry and spoke about her fondly but when he had seen her before she was a sixteen year old girl! Now she was a woman in her mid twenties! He decided it was best to go with her and keep an eye on Harry, after all he was his godfather... well that and the thrill of going back to hogwarts for a year and getting fed regularly sounded pretty good.

A minute passed and Serenity returned this time with the potions master he was handing her a small pink water bottle. "Drink from it at every meal." His voice was demanding and full of authority but Serenity just rolled her eyes. "You told me that when I first took a drink." She said.

Snuffles noticed that her tight clothes now fit her rather nice, her womanly shaped face was now girlish and rounder but her hair was still striking silver. She's de-aged herself with the potions masters help. Very odd indeed.

Serenity patted her leg and called Snuffles. "Come on Snuffles, lets go to Hogwarts." Snuffles quickly went to her side and growled at Snape as he passed. Serenity smiled down at the dog in approval and glared at the Potions master as she passed as well and she stepped into stride next to Setsuna, "So, do I go ask Dumbledore about Snuffles? Or should I let you do it?" Serenity asked as they made their way down the stairs and into the streets of Hogsmade.

"I think I'll talk to the headmaster. I have some things to discuss with him anyway. You may want come with me. I believe he has something to tell you himself." Setsuna replied.

The trio made their way up to Hogwarts castle in silence after that. Classes seemed to have let out for the day and everyone was going heading toward the great hall for dinner. Serenity realized how hungry she was when her stomach growled loudly. Setsuna gave her am amused glance and Serenity blushed in embarrassment. "We'll get you something to eat after we talk to Dumbledore." She said as they came upon the stone gargoyle.

"If you please?" Setsuna asked motioning toward the gargoyle. Snuffles sat at the stone creatures feet looking up at Serenity as if asking what she was supposed to do or say to make the gargoyle move. Serenity, pet the gargoyle and it shifted moving into a long spiral stairway and the three went up to the headmasters office.

Setsuna didn't bother to knock once at the headmasters threshold, and instead walked in. "Why Setsuna, I'm surprised you didn't knock." Albus Dumbldore said with a look of humor. "Although, I suppose your keen sense of time probably tells you that I wasn't with anyone at the moment." He continued with a chuckle.

"Quite sorry." Setsuna started, beckoning Serenity to sit. Snuffles sat at the princess's feet and licked her hand affectionately as if trying to convince everyone he was a good dog. "We just wanted to see you before we sent Serenity back off."

"Yes, I'm glad you're back to normal Serenity. You've been in tight corners before, I'm sure you'll manage to bamboozle the student body that you're still their age. Setsuna once told me a very funny story about you when you turned 1,041,." Setsuna glared as if to warn him not to reveal too much but the old man continued, with a twinkle in his eye, "you'll did a very silly thing for your birthday party that would be considered very un-adult like!"

Serenity gave a look of loathing to Setsuna. "You really need to stop telling people about a future, I don't even know about yet!"

Setsuna ignored her. "So is there anything else I need to know before I go back to the time gates for the night? I need to devise a lesson plan for the week."

"Yes, but first I need to talk to Serenity, then she can go off to the great hall and we'll have a private conversation." Dumbldore said turning toward Serenity. "Now, my dear, I'm afraid due to your... condition, we're going to have to give you a private courters. We can't have you waking up in the middle of the night just to take more of your potion so you don't wake up an adult again."

Serenity nodded. The thought of waking up in her adult body and frightening other students wouldn't be a pleasant way to start the day.

"I've taken the liberty of decorating your mothers old room, at the top of Gryfindor Tower. It should be to your liking. " Dumbldore said with a slight smile. "The other students will have no recollection of your rooming with them, just that we were short of beds and you were a late en-roller, hence your own room." Dumbldore explained. Serenity nodded in acknowledgment. "I'm afraid I didn't know of your guest however." Dumbldore said, peering over his desk and finally acknowledging the large beast at Serenity's feet.

"Oh, I forgot to tell you about Snuffles!" Serenity said looping her pale arms around the animal. "He's quite tame, I found him skinny and begging in Hogsmead! May I keep him instead of a cat? He can stay in my room!" Serenity pleaded her case with watery eyes, afraid of what the headmaster might say.

"Well, Setsuna and I must have a talk with him first." Dumbledore said with a knowing smile. Serenity looked at him questioningly and he replied. "Give him proper vaccination spells and such, only precautionary of course." Dumbledore explained smoothly.

Serenity nodded and Setsuna, seeing that she was satisfied with Dumbledore's answer motioned for her to step outside. "I'll show you to your room after you've eaten, go down to the great hall and get some food and meet me back here. I'm going to speak with Albus alone while he vaccinated Snuffles for you." Setsuna said gently.

Serenity stepped up and walked outside the door and Setsuna closed it quickly behind her. "Sirius Black." Dumbldore addressed the shaggy dog still sitting by the seat Serenity had just occupied. A few seconds later Sirius Black stood where the dog had been before.

"Professor Dumbldore." Sirius said with a mocking bow. "I'm glad to see you again." He said with a boyish grin.

"Sirius, you do realize that you were in the company of a moon princess, do you not?" Setsuna said turning to the escaped convict.

"I truthfully was a bit confused by it," Sirius admitted, "hence why I followed her to the castle. I was told about her by Harry, he spoke fondly of her... but she said some things while I was in her presence that made me think she might be dangerous. I didn't know she was a moon princess."

"I'm sure if you had payed attention in history of magic you would have known about the legend." Setsuna said examining her perfectly sculpted nails.

Sirius shot her a dirty look before replying disdainfully, "Then why don't you explain it to me?"

Setsuna looked up at the scruffy man and smiled wanly. "Of course I was planning to. Please take a seat." Sirius looked at her scrupulously before setting himself down behind Dumbledore's desk, all the while Dumbldore sat watching the scene unfold.

"Would you care to know the legend first? Or the explanation for her age changes?" Setsuna asked softly. Sirius shrugged.

"The legend first, please Setsuna." Dumbldore interrupted the two. Setsuna turned to the headmaster and nodded curtly before beginning the tale. "Long ago, there was a kingdom on the moon. It was serene, beautiful and the ruling planet in the universe, not a satellite of the Earth, which was a neutral planet at the time and not aware of the Moon's reign." Sirius listened intently as Setsuna sat down beside him to continue the legend.

"It was always ruled by one named Serenity and our Serenity, was the 15th in a generation of thousands of years of ruler-ship. I suppose they usually died around the age of 16,000, so you can imagine the longevity of their reign. I have been around for them all, for I'm the ruler of time, I shall live forever." Setsuna explained. "I'm expected to know all of the details I suppose..." She trailed of before continuing again, not before making sure Sirius was listening to all she had to tell him.

"Serenity's mother was the favorite out of all the descendants of Serenity, and her daughter, was the most beautiful and considered (although it was hard to believe) even more fair in her politics than her mother. She was expected to outdo her mother and be the best ruler of the silver alliance... But she never got the chance." Setsuna choked on her words, the thoughts still pained her of that day.

"Serenity's betrothed, who is now dead and buried, and the rest of the silver alliance royalty were murdered brutally by a dark creature. Queen Beryl, an evil witch, maybe more evil than Voldemort." Sirius flinched at the dark lords name but Setsuna took no notice and concluded the legend. "Serenity's mother, used the last of her power to send her daughter and her court to the future... they have died many lives at the hands of the witch queen, but Serenity, our Serenity had been reborn each time from the love and devotion of her mothers final wish. She will be reborn until she finishes off Beryl I suppose... until she finally is able to live her life completely and rule the universe again. She is after all, it's rightful ruler." Setsuna finished.

Sirius sat and digested the information before speaking, not just to Setsuna, but to everyone in the room. "So, the age change has something to do with her living so many lives?" He concluded.

"Exactly!" Dumbldore said looking at Setsuna. "Anything else will have to wait for another time, Setsuna must show her majesty to her room, and you must turn back into your other form. I'm going to allow you to stay, but you must watch out for not only your godson but your new charge as well. Serenity will need you to watch over her. Do not reveal yourself unless need be, it's probably better she didn't know of you just yet." Dumbldore said standing and ushering Setsuna and Sirius toward the the door.

"Oh, before we don't get the chance to speak again," Dumbldore began turning back to Sirius. "Come give me little updates on her highness when you can, she's bound to get into some type of trouble and it will help to know what she's up to. Setsuna will understand I'm sure." He said giving her a little wink. "Now, pad off to bed!" He said as Sirius took on his dog form. "I'll explain to Harry tonight about your... mission, he'll be sure not to tell anyone, especially her highness that he knows of her status." He said with a steely glance at the now dog figure of Sirius Black, as if to say 'Don't you tell her either!'

"Well, goodnight Albus." Setsuna said opening the door to reveal Serenity in conversation with the young Harry Potter outside the door. Sirius concealed himself behind Setsuna as best he could as Dumbldore ushered the young boy in and shut the door behind them. Best not to have Harry ask questions so soon the dog thought as he padded behind the silver haired girl and her guardian.

They reached Gryfindor tower quickly and Setsuna left Sirius and Serenity at the portrait hole. The two stepped into the dim common room, no one was about but a few seventh years, too deep in their books to pay any attention to her and her beastly friend.

They walked up to the top of the spiraling staircase until Serenity found the last door at the top of the stairs. "This must be it Snuffles." Serenity said looking down at the dog who wagged his tail in some sort of happy way, knowing he could sleep for the night.

She turned the tarnished knob and stepped into her heaven. The room was much like a palace chamber, she found she had her own bathrooms and a large canopy bed, all decorated in the Gryfindor colors. She was glad he didn't go for silver, this was Hogwarts after all and she loved her house already.

She quickly plopped onto the cushiony bed and settled in, clothes and all. It was much nicer that her bed in the dormitory below, she had to admit. She closed her eyes for a moment and then looked over toward the door where Snuffles sat patiently looking around at his surroundings. She giggled at his un-doggish behavior before heading to the bathroom to change into her night clothes.

Upon returning she found her doggish friend laying down on the carpet beside her bed. She quickly walked across the cool floor in her bare feet and jumped under her covers. She snuggled in for a moment before leaning off the bed and scratching Snuffles under his chin. "It's so nice to have you here. It's lonely keeping secrets to yourself... but you know my biggest one now, so I'm not really alone now am I?" She said with a whimsical smile before patting the bed beside her. "Up boy!" She said with a commanding happy voice.

Snuffles looked at her for a moment and down at the ground as if deciding what would be better before jumping up beside her, leaving quite a bit of room between him and the silver haired girl. She however rectified this by scooting close to her furry friend and putting a creamy arm over his thin body, and laying her head upon her pillow for the night. Snuffles, if he had been Sirius would have shrugged, but being he was a dog he didn't and cuddled in for the night.

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Thanks for reading! Comments encouraged, although I already know the pairings so you can request, but it won't do any good. Sorry!