Chapter 1:

Tonks was told that she would be arriving at Kings Cross station with a couple of the other Auror's playing her parents. So there she was dressed up like a thirteen year old witch, with Proudfoot and Eva by her side, playing her parents. As she rounded the corner she saw the Weasley family. Knowing that Ron, the youngest Weasley son was best friends with Harry, she ran straight into one of the older boys who were stood next to their mother, intending to get introduce her cover to Molly, who incidentally she already knew through Charlie and Bill, Her eldest sons.

"Oh gosh. I'm so sorry. I didn't mean to run at you. I'm such a klutz." She apologized to the boy.

"Oh don't worry about it. He's fine." Mrs Weasley grinned down at her. "Aren't you Fred?"

"I'm George, but yeah I'm fine. Don't worry about it." He grinned at her.

"Are you lost dear?" Mrs Weasley asked caringly.

"Oh my parents are here somewhere." Tonks looked around innocently. "Oh there they are." She pointed to Eva and Proudfoot.

"There you are Kaye, Darling." Eva smiled maternally at her. "Oh you've made some friends."

"Hello. I'm Molly Weasley. Your daughter tripped into one of my sons here. I was just making sure she was okay." She introduced herself kindly.

"I'm Eva Adamson and this is my husband John. I have no idea where she gets her clumsiness from sometimes. Well anyway thank you. It's our Kaye's first time at Hogwarts, although she'll be in her third year."

"Oh. I have a son in third year. I'm sure you'll get on just fine with him and his friends." Molly smiled at Tonks. "Well we best be off. It was nice to meet you."

The Auror's waited for the large group of witches and wizards to pass through the barrier.

"Good thinking Tonks. Introducing yourself early on. Anyway we best be off. Got lots to do. You better get yourself through the barrier. See ya." Proudfoot turned away.

"I'll miss you, you know Tonks." Eva told her. "What'll the office be without your cheerful entrance in the mornings? Just don't do anything stupid yeah?" The two witches said their goodbyes and Tonks ran at the barrier.

Tonks loaded up her trunk on the train and headed off to find the potter kid and his friends. The train was quite busy as it was, which would serve as an excuse to introduce herself. Soon enough, the train was heaving with Hogwarts students finding their friends and a place to sit. Tonks decided to wait with the luggage until the train started moving to find her place.

As she walked down the train, Tonks smiled at her memories of her time at Hogwarts and the amount of time she spent in the headmaster's office for her inability to behave herself, as Professor Sprout, her head of hous, had said.

Eventually she found the compartment the trio were sat in. She took a deep breath as she slid open the doors. They looked as though they were coming to the end of a very serious chat.

"Urm hi... Sorry but everywhere else is full. Do you mind if I sit in here?" Tonks asked in her practiced shy 13 year old voice.

"Oh hi. Yeah of course you can." The bushy haired girl replied with a grin. "Can't she?"

"Oh yeah. Come on in." The boys agreed grudgingly.

"Oh who's that?" Tonks wondered out loud, looking at the mysterious looking man in the corner, then at his trunk. "Oh R J Lupin. What does he teach?" She asked the others.

"Probably Defence against the Dark Arts." Hermione replied cheerfully.

"So how come you're in first year robes? You look our age." Harry looked at her curiously.

"Oh yeah. Sorry I forgot I didn't introduce myself did I?" She laughed casually. "I'm Kaye Adamson. I've transferred from another wizarding school. I'm a third year but I've gotta be sorted with the first years apparently. It's in front of everyone isn't it?"

"Yep. But it's not so bad." Ron smiled at her. "Oh. I'm Ron Weasley by the way. That's Hermione Granger." He said pointing to the bushy haired girl. "I bet you don't need introducing to Harry do ya?"

Tonks thought the poor kid had probably been gushed over by many kids and adults alike. "Sorry. Am I meant to know who you are?" She feigned ignorance.

"You mean you don't know who Harry is? That's a first innit?" Ron laughed. "He's Harry Potter. Ya know the Boy who lived?" Ron looked at her expectantly.

"Oh yeah. I think I've heard of you. Sorry. My family aren't wizards. They don't know much about our world. I'm the only witch in the family."

"It's not a big deal. Really. He's only the one that got rid of you-know-who as a baby!" Ron went on. "I mean really… not knowing that…"

"Oh yeah don't you have a scar on your forehead?" Tonks asked, hoping to see it.

Harry smiled at her sheepishly and lifted his fringe, showing her the famous scar.

"Bet you wouldn't mind hiding that scar sometimes, eh?" She smiled knowingly at Harry and screwed up her eyes and wiggled her nose. One second later she had the copy of Harry's scar on her forehead and his shaggy unkempt hair atop her head.

"Wow. How'd you do that?"

"Yeah I wouldn't mind it. Can I learn to do that?"

"You're a metamorphmagus?! They're so rare!"

Tonks always got a thrill from people's reactions to finding out about her special abilities. But never had anyone so young know what she was. She was quite surprised.

"Hermione got it right I'm a metamorphmagus. So you can imagine the shock to my parents when I popped out with changing hair colours. I think my father actually fainted." She laughed. "And no sorry Harry you can't learn to be one. Metamorphmagus' are born not taught."

"I can't believe it. I never thought I'd get to meet one…" Hermione babbled.

"Sorry. She's a bit of a swot. So can you change into anything?"

The next couple of hours passed with the morph requests that Tonks was so used to by now and getting to know each other. Well that was until the train slowed to a stop.

"We can't be here yet." Hermione concluded.

All the lamps went out and the compartment was plunged into darkness. Harry got up and looked out of the door, but was shoved back in his seat as the train jolted. Ron's hand went to the glass.

"I think people are boarding the train." Ron squeaked as the glass fogged over. The door slid open and another student fell in.

"Guys, do you know what's going on?"

"Hi Neville. No idea. Sit down." Harry said.

"I'm going to ask the driver what's going..." Hermione spoke as she got up, but was pushed back down by the train jolting once again. The compartment door slide open, this time there stood was a cloaked figure known as a Dementor. A scabby, slimy hand came towards Harry.

Not thinking of her cover, she stood up and pointed her wand at the creature and whispered the incantation, thinking of her father chasing her around the garden when she was younger, with her mother looking on fondly. A shiny white light with a Jack Rabbit came flying out of her wand and started pushing the foul creature out. Not five seconds later, she became aware of another patronus working alongside her own, a Wolf. Soon after the Dementor was gone and all the lights were back on. Tonks flopped back in her seat and looked around the compartment to find everyone's eyes on her, including the previously sleeping professor. Harry was now lying on the floor with Hermione and Ron helping him up. They were all looking at her in wonder.

"What?"

It was only then that she realized that she was supposed to be a third year, who shouldn't know how to produce a patronus charm. She looked down at herself and her morph had slipped, not completely mind, but enough for them to notice a difference.

"Okay… I can explain." She said to the room of stunned people, thinking at a mile a minute about how to get out of this one. "I was in a slightly more advanced class then my years at my other school and we got taught the patronus. Oh and the dementors have a bad effect on me, so my morph goes haywire." She attempted to explain calmly.

"Well, Miss….." Professor Lupin started.

"T…Adamson." Tonks almost slipped up.

"Miss Adamson. That is a very impressive feat for a third year. Here." He smiled and handed a large piece of chocolate to both Harry and Tonks. "You'll feel better. Harry not too worry, some are more severely affected by the presence of dementors than others. Unfortunately, you seem to be one of them."

Tonks got a good look at the mysterious, shabby looking professor. She noticed that he had many scars covering his face and hands, some more faded than others. He was very thin, looking like he could do with a good meal, or five. Despite all this, there was something that drew Tonks to him, 'maybe it's his smile, it makes him look ten years younger' Tonks thought.

"If you excuse me, I need to discuss something with the driver. Eat." He pointed to the chocolate in her hand and smiled again as he left. The rest of the train journey passed rather uneventfully, apart from the discussion of the dementor, which Tonks blocked out mostly and let her mind drift back to the handsome professor.

When the students arrived, Tonks was separated from Harry and his friends, to take the boats rather than the carriages. Once at the castle, she daydreamed through the speech that Professor McGonagall made every year to the first years. Then before she knew it, she was moving through the great hall double doors and into the magnificent hall. She smiled at Harry, Ron and Hermione as she passed them towards the front, where the sorting hat sat on the very same stool that she was sorted on.

Professor McGonagall stopped all the chat and started the sorting, but not before the famous sorting song by the hat.

"Kaye Adamson, please come forward."

Tonks slowly stepped forward and stumbled a little, causing a fair few sniggers from the crowds of people. 'There's no need to be nervous. You know what house you are going to be in.' she told herself. She sat on the stool and the sorting hat was placed on her head.

'Back for some more are we?' The hat whispered in her head.

'Dumbledore told you why I was back. Right?' She thought.

'Oh yes. He also told me that you were to be sorted into Gryffindor, even though your true house is Hufflepuff. Oh well. Best do what I'm told.'

'Yes please. Only here to do my job.'

'That's right. An Auror now. Very impressive.' It sneered in her head

"Well it'd better be GRYFFINDOR!" The hat roared. Tonks jumped up and skipped over to where the Gryffindor's were sat. Instead of sitting where the new first years usually would, Harry waved her over to sit with them. 'Yes. In the right crowd already' she congratulated herself.

The sorting passed fairly quickly. Then Dumbledore stood up and said a few words of welcome and introduced the new teachers of this year. Lupin, when introduced, stood up and took a very humble bow and nodded at the student body. Whereas Hagrid blushed furiously to the shouting, clapping and cheering he received from all tables except Slytherin. Dumbledore went on to his usual notices about the forbidden forest. But this year, the Dementors of Azkaban would be guarding all entrances of Hogwarts to protect the students against Sirius Black. Once the students had been warned, Dumbledore started the feast. Tonks had forgotten how amazing the food at Hogwarts was and she proceeded to inhale all the glorious food.

"Hey Ron, looks like we found someone who enjoys food as much as you do." Harry laughed good naturedly with Tonks and Ron. Tonks turned to Harry and flipped him off and laughed when he looked stunned. 'Shit I'm meant to be 13 not 22.' Tonks thought to herself.

They had all of Tonks' favourites from when she was here. The Chicken, the Turkey, Chips, Gravy. She hadn't eaten this well since she left home when she was 19. She was a rather shockingly bad cook herself, so she never managed much more than a muggle micro meal. By the time the tables changed to desserts, Tonks was pretty much full and could only manage a slither of the famous Hogwarts Pumpkin Pie.

Tonks was walking towards the exit of the great hall, clutching her stomach like she had a food baby, with Harry, Hermione and Ron when Professor McGonagall called her away from the kids and told her that Professor Dumbledore wishes to speak to her.

"You should remember where that is. If I remember rightly, you were constantly in and out of it. The password in Fudge Flies for now. I have a few matters to attend to, I'll see you tomorrow for Transfiguration, Miss Adamson." McGonagall informed her and swept away quickly. So Tonks made her way, as fast as possible, towards Dumbledore's office.

"Fudge Flies." She spoke to the Phoenix guarding the room, which instantly turned to show her the spiral staircase. Once at the top, Tonks went to knock, when the door swung open.

"Good evening Nymphadora." Professor Dumbledore spoke from within his office.

"Wotcher Professor. Remember, it's Tonks. I would usually threaten anyone who dares call me the N word with a hex of some kind, but I feel that the threat would be inappropriate in this situation." She winked at her old professor, who she got on so well with, despite her mischievous streak.

"I'm sorry Miss Tonks, it's been a while." He smiled at her. "I called you here to ask how the train ride went, I got a rather brief message from one of our new professors informing me that Dementors came aboard, and to brief you further. Oh and whilst you are in here, you may be you and not Kaye Adamson."

Tonks was relieved at that and switched back to her natural form, her face turning to heart shaped, her lips thinning out and her nose growing slightly and of course her hair switched back to her preferred colour, bubble-gum pink. She shot Dumbledore a cheeky wink and a smile, to which he laughed joyfully at.

"Well Sir, it could've gone better. I almost gave myself away many times. The most obvious time being when I produced the patronus charm in front of the kids, to ward of one of the dementors. I didn't even think of my cover. I guess that's what training with Mad Eye does to your instincts." She tried to laugh it off. "In other news, I did manage to sit with the trio, as everyone seems to call them. I should be able to be a part of their inner circle."

"Well, I'm not so sure having instincts that quick is a bad thing. Do they suspect anything?" He inquired.

"I don't think so. I managed to explain it away to them and that new teacher, Lupin is it?"

"Very good Ny…" He saw the look she was shooting him and chuckled. "I'm sorry, Miss Tonks. Well I wanted to give you your timetable early. You will be in every class that harry has chosen this year. I am sure you are aware that you will be stationed here until the threat against Harry has decreased. The main goal is to keep Harry safe whilst at Hogwarts. Your Job would be easier if they did not find out your true identity, as Harry and his friends tend to keep secrets very well between them."

"Okay. Well concealment and disguise is my speciality. I will try as hard as I can." She promised her old headmaster.

"I do not doubt you Miss Tonks." Dumbledore reassured her. "I do understand that what you will be 'learning' is way below your skill level, but I must ask that you don't show your true skill too much. Remember you are playing the part of a 13 year old witch, not a qualified Auror."

"I will try my very hardest not too show off… well too much anywa…" She was cut off by the voice of the new professor coming around the corner.

"I was informed that you wished to speak with me Headmaster."

She quickly morphed back to Kaye Adamson, not aware if she was quick enough.

"I'm sorry for interrupting." He looked strangely at Tonks. "I will come back later, when you have some time for me."

"Nonsense Remus. Come in. I am going to assume that you saw that there was a young, bright haired witch sat where Miss Adamson now sits." Dumbledore spoke.

"Well. Yes. But I wouldn't have said anything." Lupin stuttered.

"Of course not. I thought this lovely woman might want some adult conversation once in a while, so I will explain. Miss Tonks, you can change back if you like."

Tonks laughed at Lupin's confused expression. She screwed up her face and wriggled her nose and once again morphed back to her twenty two year old body. Lupin stood with his mouth hanging open in a state of shock.

"You're… You're a metamorphmagus?" He recovered quickly. "Wait… So you're not a 13 year old that can produce a patronus charm?"

"Ha. No. I wish I had that sort of power at 13." She laughed at his confusion once again. "No, I'm an Auror sent here for extra protection for Harry Potter. When that Dementor came towards him my instincts kicked in." Tonks explained briefly. "Mad Eye better bloody be proud." She added as an afterthought.

"That makes slightly more sense." He smiled at her. "Well since I'm not really your teacher. I better introduce myself properly. I'm Remus Lupin."

Tonks stuck out her hand to shake his. He stopped himself for a second, then shook her hand.

'Wonder why he reacted like that.' Tonks thought, already intrigued. 'A very mysterious man, this Remus Lupin.' Tonks suddenly realised that she hadn't said anything and was still shaking his hand. 'Introduce yourself you stupid witch!'

"Oh right. Sorry. I'm Tonks." She grinned at him, embarrassed and pulled her hand away.

"Just Tonks?" He asked interestedly.

"That's all you get for now. My first name is bloody awful. Anyone who uses gets one of my very inventive hexes." She winked at him.

"Oh yes. You do not want to be on the receiving end of any of Ny… Miss Tonks' hexes. I remember a young boy spending a week in the hospital wing thanks to a very interesting hex to his genitals."

"That. Was for more than using my name." She smiled remembering that particular incident.

"Well that's all I have for you Miss Tonks tonight and Remus, I only wanted to ensure you had settled in well." Dumbledore informed them.

"Very well, Headmaster."

"Well. Thank you. Would you be able to shop Miss Tonks to her common room? As I remember you were very much a Gryffindor."

"Of course."

"Thanks Headmaster. I won't let you down." Tonks reassured him, once again and morphed back to her 13 year old cover.

"Good evening both of you."

The pair walked out of his office.

"So you weren't a Gryffindor? Let me guess… You were a Hufflepuff girl. Weren't you?"

"Bang on there. But I had a boyfriend in Gryffindor, used to sneak in there sometimes." Tonks reminisced.

"Somehow that doesn't surprise me." He smiled at her, almost teasingly.

"Hey! I am an enforcer of the law. You're talking to an Auror here." She mock frowned.

"An Auror with a penchant for mischief. I see right through you Miss Tonks." Lupin replied.

"Just Tonks. You can drop the Miss. God I couldn't deal with being called Miss or Professor. It'd make me feel so old." She grins. Her face fell as she realised what she said. "Of course, not all professors are old. I mean look at you…I just…Urgh." Tonks spluttered and Remus laughed at her. "You know what I mean."

"It's okay MISS Tonks. I am practically ancient compared to you."

"No you can't be any older than early thirties." She looked shocked that he thought he was old. "I don't see you as old!"

"Well thank you. And so you know I am thirty five. So I am a good ten ish years older than you."

"Does that bother you?" Tonks winked at him. "You know I've always preferred older men." Lupin spluttered as they reached their destination. "You know I think I'm going to have to force my company onto you every once in a while, you know so I don't go stir crazy." She smiled at him.

"It would be my pleasure Miss Tonks." Remus told her sincerely, smiling wickedly. "It'll give me more time to work out what the last syllable of your name is. You know apart from Nym…"

She laughed. "Good luck with that. That is a secret I try to keep well hidden from new friends."

"Ahh, but we're surrounded by teachers who knew you as a child and who therefore know your name."

"Who also don't know that I'm Tonks rather than little Kaye Adamson. So good luck at that. Anyway better be going, curfew and everything. I'll see you later, Professor." She threw a wink over her shoulder and moved her hips more than she usually would as she passed through the portrait. Then realising that she was in the body of a little girl and wouldn't have the desired effect on her new friend. She laughed at herself as she went to bed.

AN: Thank you so much for the support from everyone so far, especially the reviewers. *hugs* Anyway, some of JKR dialogue from the PoA has been used. I do not claim ownership of anything you recognise. (If I did, then Tonks and Lupin would both still be living, happily with Teddy and many other werepups/metamorphmagus babies.) Anyway, where was I? Oh yeah. Thanks for the support and everything. I hope you enjoy the first chapter. It's longer than anything else I've ever written, but I'm putting quite a lot of effort into this one. Not sure how often I'll update. So better follow if you're interested ;) ENJOY!