A/N: The idea to this story popped into my head some time ago. Because Minerva McGonagall is my favourite HP character and I truly enjoyed the "Highlander" spin-off about Amanda. I have no beta-reader therefore all remaining mistakes are mine alone.

Let me know if you interested in more about this unusual pairing! Please, enjoy!

My Immortal

Chapter 1

This was not at all going like she had hoped or anticipated. Her assignment had been clear but no way had she thought she would end up here in the middle of muggle London of all places. She was afraid her presence and what she had to do would cause more damage than do good. Albus had been very clear that they needed to find out what was going on within Voldemort's followers for the past few months same very strange things had happened to a few members of the Order. Minerva had been careful when she followed the Death Eater through some kind of portal and was surprised to find herself in the middle of Piccadilly Square in a crowd of muggle heading either towards the theatres on Shaftesbury Avenue or the cinemas on Leicester Square. She was turning on her axis trying to catch a glimpse of her target and was relieved when nobody took particular interest in her. At the second turn she finally found what she was looking for and started her pursuit anew. Careful to not get detected by the man she was swallowed by the crowd grateful for her height so she wouldn't lose sight of him by the hustle and bustle on the streets. He walked with determination towards Piccadilly Street and suddenly disappeared into an alley. Minerva was following undetected and her surprise nearly led to her detection when she saw him deep in conversation with a broad shouldered man who seemed to be a muggle. Slowly she crept nearer to their position to hear what they were talking about when on the fire escape above them another dark figure appeared calling the muggle by his name.

"Marcus!"

The man whipped his head in direction of the voice and he roared in fury at the woman above him. Minerva was quite certain it was a woman judging by the sound of her voice. She saw the Death Eater slip into the dark; he clearly decided to wait until the muggles had finished their argument. Minerva decided to do the same and resigned herself to wait for the time being. The woman jumped gracefully down and with the catlike moves of a trained fighter she neared the man she had called Marcus.

Before Minerva knew what was going on they both had drawn swords and were fighting causing sparks to fly each time their swords met forcefully. The commotion caused the Death Eater to step out from his hiding place and grab the briefcase that still lay open and forgotten on one of the waste bins in front of him. Whatever it was that it contained Minerva knew she had to get it before he did. It could be the end of the Order or even worse the end of their world as she knew it if she didn't. So she stepped from her place in the dark and pointed her wand at the briefcase while she caught it with her other hand as it flew in her direction. The Death Eater spun in her direction and his face contorted in fury when he recognised her.

"You! You interfering dried up old bitch! Give me back that briefcase!"

"I am sorry but I am afraid I cannot oblige." Minerva readied her wand just like the muggles their fight started in earnest.

Fiona had been on Marcus's tracks for weeks. Ever since their confrontation on Tower Bridge two month ago she knew something fishy was going on. She had been out on a stroll for it was a rather pleasant evening in June when she had sensed the presence of another immortal on the bridge. Hoping against hope it was rather a friend than a foe she was soon disappointed when Marcus Barnes came walking her way. With her hand in her light summer coat she had advanced and only drawn her sword at the last moment. What should have been a fight to the death turned out to be nothing more than a little skirmish because Marcus as it seemed was otherwise occupied and disappeared into the night as soon as she was preoccupied for just a moment. This was completely out of character for him and she wondered what he was up to. Nothing good she was certain about that. It took her quite an amount of time and money before she was on his tracks again. So when she found out that he was selling the newest weapon technology on the black market she knew she had to stop him. Fiona had found out that tonight was the night when he would meet with his client and she made sure to stay out of close range. She had taken up her observation post on the roof in safe distance to her target and didn't have to wait long before Marcus met his client. From her spot on the roof she saw another figure entering the alley but Fiona wasn't sure if it was a man or a woman for this person made sure to stay as much as possible in the shadows, to remain undetected by the two men in front of her. Fiona was afraid this would complicate things but it couldn't be helped now. She couldn't allow Marcus to sell this technology to some unstable country which would use it against their own people. Fiona left her safe place on the roof and as soon as she stepped nearer Marcus knew they weren't alone.

They fought with all their might, Marcus was already bleeding heavily and so was Fiona. Neither of them ready to yield. From the corner of her eyes she had seen that another fight was going on behind their backs. Damn it, now she had not only Marcus to think off but also the woman, for as it turned out it was indeed a woman who was engaged in battle with Marcus's client. She was in possession of the briefcase and for a moment her concentration slipped and Marcus, who had realised that as well, was approaching them. The woman had her back to him and wasn't aware of the danger she was in. Her opponent saw Marcus coming their way and they exchanged a brief glance of understanding. He turned on his heels and fled from the alley leaving his stunned opponent behind. Marcus was advancing but Fiona had dogged to her right and was running and jumping over boxes. She did a summersault and landed just behind the woman with her sword over her head blocking Marcus' strike to behead the woman.

Minerva only wasted the briefest of thought why those muggles were fighting against each other with swords before she was fully engaged herself in battle against the Death Eater. They were fighting tooth and nail; all the while Minerva had an eye on the others in case the woman needed help. She was more than surprised when her own opponent suddenly tucked tail and left the alley. She nearly paid her distraction with her life when the woman in the long coat came to her feet behind her back startling her and nearly knocking her over. Her saviour was preventing the mountain of a man from severing her head from her shoulders. Minerva could see the strain it took to ward off his blow and she felt her warm breath on her cheek when she whispered her order, "Go!"

But Minerva was rooted to the spot at the woman's effort to keep the sword from her neck and finally succeeded in pushing him away back into the alley. Minerva pocketed her wand and clutched the briefcase she still held in her hand against her chest. She observed their fight with keen eyes and one of her hands flew to her mouth to cover the shout that was trying to escape when the woman ducked under the onslaught of blows at her body. One of the blows though hit its target when she saw the woman fall to her knees in pain. Minerva simply couldn't believe that everything should be over so soon that her saviour should lose her life in a back alley in London by the hands of a mere criminal. What happened she wouldn't have expected in her wildest dreams. Just as the man was raising his sword over his head, ready to deliver the final blow the woman pushed her own sword into the man's chest and holed herself to her feet with the momentum. She withdrew the weapon and as the man lowered his hands and looked disbelievingly down on his wound she swung her sword and severed his head from his shoulders.

Minerva saw as the woman fell to her knees again in exhaustion, her hand still firmly clutching her weapon when suddenly a wind took up in the alley and flashes of light shattered all the windows but finding their target mainly in the woman on the ground. She had her arms raised as if to welcome the powerful energy of the flashes before she finally fell on her back after the sudden thunderstorm was over.

Minerva was still in a daze from what she had just witnessed and took a tentative step towards her saviour. She took up her long dark green robes in her hand and kneeled down next to the fallen woman to make sure she was still breathing. With a shaking hand she reached out when she heard the distinct voice of Bellatrix Lestrange in the opening of the alley. Minerva knew she couldn't waste another minute more, so she simply put her hand on the woman's shoulder and apparated back to the hospital wing at Hogwarts.

Poppy Pomfrey had just finished her last report after the last Quidditch game when her old friend and comrade suddenly appeared in the middle of her infirmary. Minerva McGonagall decidedly not looked like her usual put together self. Her usually immaculate robes were torn, loose strands of hair were hanging into her face and there were bloody scrapes on her knuckles. But most peculiar of all was the fact that she was kneeling beside an unconscious stranger who was holding a sword in her hand and blood was staining the floor underneath her lanky body.

"Minerva, what happened?" It was Albus Dumbledore's deep voice that brought her to the present. She stood and pushed some hair from her sweaty brow with the back of her hand before she turned her emerald eyes to her friend.

"Something we hadn't anticipated, I am afraid." She held out the briefcase which Albus took and only then did he cast a glance at the form on the floor. He swept down and brushed the hair from the fallen woman's face. It took only one look at the woman on the floor and he nearly fell back in surprise. This wasn't what he had expected at all. If he didn't know better he would have sworn the calendar had been turned back to 1944 in this instant. Albus looked at Minerva and realised she had no idea who this woman was. Now was neither the place nor the time though and he stood with a concerned look on his face.

"Why did you bring her here? It is only two days before the inspector from the Ministry is going to arrive."

"I know Albus", Minerva said with a strain in her voice. Only now did she realise how tired she was. "If there had been another way to handle this situation I would have."

"Of course, I am sorry Minerva. I didn't mean to question your judgement."

The gentle clearing of a throat made them slightly jump and both turned with a guilty look on their faces. Madame Pompfrey was glaring at them incredulously for keeping her from her patient.

"Oh, yes, sorry", Albus mumbled, "why don't we let Madame Pomfrey take care of our patient and you tell me what happened?"

"Albus, this will have to wait", Minerva stopped him with a raised hand when he started to object. "I want to make sure our guest is all right first."

"Minerva..."

"She saved my life, Albus. If it weren't for her there would be nothing to talk about."

"Well, right. I will see you later then."

It wasn't a question and Minerva knew it. So she merely nodded and handed him the briefcase she was still holding. At the questioning raise of his eyebrow she only shrugged.

"Maybe our guest knows more about this." Minerva suggest weakly. She had been there after all, which couldn't have been an accident.

"All right."

After Albus had left Minerva turned to Poppy to find her already busy with her patient. She was cleaning her wounds, making sure she was comfortable.

"How is she, Poppy?" Minerva asked as she stepped closer to the bed the woman was lying on.

"Not good, my friend. She has lost too much blood. I fear she will not survive the night." Poppy answered truthfully. There was no point in lying to Minerva for she would have known the moment she told the lie. The nurse put a hand on her friend's shoulder before she returned to her office. Minerva sank heavily down on the chair next to the bed feeling as old as she was. Each and every year weighing heavily on her shoulders. She leaned back in the chair and closed her eyes to rest only for a few minutes. Before she knew it she was fast asleep.

A/N: Would you like to read more? Or should I just forget about this story? Let me know!