Hello there! So you found my story! Before you start reading, here are some things you might want to know:

The crossover: This is mainly a crossover between Harry Potter and the Originals, but I took the liberty of also including Stefan and Caroline for the sake of the plot.

About the timeline of the story: It takes place 15 years after the end of season 2 of the Originals and at the start of Harry's 5th schoolyear. Obviously that creates a bit of a problem for the timeline. To keep things as easy as possible, I will keep any dates given in Flashbacks of TVD or TO, but will also stick with the timeline from the Harry Potter wikia. And let's just pretend they had whatever technology we (or the originals) use now, back in the 90s. Also, for the flow of the story, I will be merging Harry's 5th and 6th year at Hogwarts. I hope this won't be too confusing, I will be mentioning important events briefly.

What I knew when I started writing: I planned the whole story before the start of the 3rd season of the Originals, so my background story doesn't take into account whatever we might learn from Flashbacks there. I also haven't watched Fantastic beasts yet and even when I do, the American wizarding community will be ignored completely!

My beta-readers: I'm very grateful to ElejahMikaelson, who beta-read the first 14 chapters and now really excited to work with Aerlinniel722, who took over after chapter 15!

Reviews: I always love to hear your opinion and will also try to answer all of them! If you leave a guest review, I sadly can't do this, but know that I am very grateful anyway and appriciate you taking the time!

The rating: rated M for the references to violence and quite dark themes with character deaths.

Disclaimer: Sadly I own neither Originals nor Harry Potter.

And now: Enjoy the story!

Chapter 1: A mysterious guest

Grimmauld Place number 12 - Tuesday, 24th of August, 1995

Hermione:

"Oh, Ron, come on, hurry up! I don't want to stand here all evening!" I told him, annoyed, when he and Harry started another water-splashing fight, the dishes completely forgotten.

We've been staying at number 12 Grimmauld Place for some weeks, but now the summer holidays were nearing their end and we only had one week left.

Since Harry's hearing, things have become about as quiet as it can ever be at the headquarters of a secret organization. Members of the order came and went, meetings were being held and plans were made for fighting Voldemort. But Harry, Ron and I weren't involved in any of that and Mrs. Weasley kept us busy, cleaning up the house, which was always interrupted by Fred and George playing pranks on every victim they could find.

Overall, I was still quite happy that I'd chosen to spend the summer here with my friends instead of sitting in our house near London alone all day, while my parents are at work.

At the moment, Harry, Ron and I were cleaning up the kitchen after dinner, while the adults were preparing the sitting room for the big order meeting, which will take place later this evening.

"What is so special about today's meeting anyway? We were cleaning the house the whole day long!" Ron complained, for the 100th time.

"Maybe they found a new lead concerning the weapon? You know, the one Voldemort is after. I mean, surely they have to make some progress." Harry mentioned his favorite theory again. I just sighed and went back to washing the dishes. Oh how I miss dishwashers!

"Yeah, but mom was like super stressed to get that one room ready, do you think someone will stay here overnight?"

"Seems so, but that must be someone very important for your mom to make such a fuss about it. Normally the guys from the order just take the small guest room on the second floor. Must be someone really special, considering that we had to spend the last three days cleaning and decorating that big room next to Sirius'..."

At that moment, we heard the front door open and the distant voices of Moody and Dumbledore talking to the others.

Molly entered the kitchen, looking around critically. "You aren't even finished yet? What were you doing all that time? And how did you manage to get everything so wet?! Doesn't matter, I'll do the rest with magic. You can go up to your rooms now. AND STAY UP THERE, do you hear me? No sneaking around this time, trying to eavesdrop. That goes for you too!" She shouted to where Fred was just coming into the kitchen, looking for something.

"But mom, I'm already of age and I don't understand why you won't tell us anything." He started protesting, instantly.

"NO FRED, I MEAN IT, NO LEAVING YOUR ROOMS! And now go, I have to finish cleaning this up, before the rest of the guests arrive." She shooed us out of the room, suddenly looking nervous. She tried to do a cleaning spell, which only made the dishes drop in the sink, splattering water everywhere. "Oh gosh, why does that have to happen now? Oh well, no one will enter the kitchen anyway... Why are you still standing here? Go!" She ordered us again and went to greet Prof. McGonagall, who just came through the front door.

Quickly, we climbed the stairs and sat down in Fred and George's room, where Ginny and George were already waiting.

"What's the matter with her? She seems so nervous and stressed today." I voiced my thoughts. Mrs. Weasley had spent the entire day running around, double checking every room; nearly burning down the kitchen when she tried to make dinner.

"Yeah, I know, must be some really special guests here today... What a shame we won't see them..." George replied, with a mischievous glint in his eyes, looking at us.

Suddenly everyone looked expectantly at me, waiting for me to decide.

"Oh…well, one look won't kill us, I guess, but after that we'll come right back here." I was curious too, after all.

Ten minutes later, we were standing, hidden, on the first floor, looking down on the entrance hall. Apparently the whole order was here today. They all went into the sitting room, which Molly and Sirius had prepared.

Suddenly the doorbell rang. And of course Mrs. Black started screaming at once about bloodtraitors and mudbloods being in her house. Sirius and Prof. Lupin went and tried to close the curtains again, while Prof. Dumbledore went to answer the door, Prof. McGonagall trailing behind him, waiting at the other end of the room, looking slightly weary. Some of the others also peeked out of the sitting room curiously, all wanting to catch a glimpse of the newcomer. Ron leaned forward a bit more, nearly falling, but Fred caught him at the last moment.

Dumbledore opened the door and everyone seemed to hold their breath. The only thing that could be heard were the (very loud) screams of Mrs. Black. ("ALL THESE THIVES AND SCUM YOU DISGRACE FOR A SON LET RUN AROUND IN OUR HOUSE!")

Outside stood a good looking man in his late twenties, wearing a black muggle suit.

His eyes scanned the room quickly and after a long glance at Prof. Lupin his gaze settled directly on us. A shiver ran down my spine. Something about that gaze made me want to run far away in the other direction. After a long moment, he turned his attention to Prof. Dumbledore and politely offered his hand.

"Professor Dumbledore, I would imagine. I'm very pleased to meet you. I have heard quite a lot of stories about you."

"Welcome, Mr. Mikaelson. Those stories can't even come close to those they tell about you." Prof. Dumbledore chuckled and gestured for the man to follow him into the sitting room, where the other order members quickly hurried off to. Only Prof. McGonagall had remained.

The man looked slightly annoyed and didn't even try to enter the room. "Who is the owner of this house? I'm afraid I need to be invited in." He explained to Dumbledore, apologetically.

"Oh of course, I'm sorry, I forgot. Sirius? Would you be so nice?" Sirius gave up trying to shut up his mother and went to the door.

He seemed to be confused for a moment, but then his face lit up in understanding.

"Oh yeah, sure, come in." He offered, smiling.

Suddenly there was silence. Mrs. Black had shut up all of a sudden. Everyone looked puzzled and turned to see her. Did Prof. Lupin manage to close the curtains alone?

But there she was, curtains still open. But she no longer looked angry and disgusted but instead she was white as a ghost looking horror-struck at Mr. Mikaelson, then at Sirius.

"What have you done? Do you want us all to d..." Her voice was only a whisper now and Prof. Lupin used it to his advantage and shut the curtains.

Mr Mikaelson seemed unimpressed and entered the entrance hall, going to stand before Prof. McGonagall. Suddenly a small smile broke out on his face.

"Hello, Minerva. It's good to see you again. You look absolutely stunning in that robe." He complimented her green dress robe, took her hand and placed a small kiss on her knuckles.

Prof. McGonagall laughed and...was that a blush on her cheeks?

"Still the gentleman, I see. You have no idea how glad I am that you're here. You really don't look a day older than the last time. And I like your hair." She smiled back at him and then turned to lead him to the meeting. Before he entered the sitting room, he turned around one last time, looking back at us, his eyebrow raised disapprovingly, then he was gone.

We quickly left our hiding spot and went back to Fred and George's room.

Once the door was closed, the questions started.

"Who do you think that was?" Ron started, excited. "Did he see us? Do you think he'll tell mom? And where does he know McGonagall from? What's his name again? Mickysen?"

"He's called MIKAELSON, Ron. Honestly, how can you not remember that?" I answered, a bit annoyed. But, somehow, that name rang some bell.

"Oh, I'm sorry, but I was a little bit distracted!" He replied sarcastically. "Didn't you notice how creepy he was? How Mrs. Black reacted to him?! What kind of name is that anyway? Mikaelson?"

"I think it's Nordic, but I've also heard it somewhere before, I just don't know where!" I told him, frustrated at being unable to remember.

"You've heard it before? Maybe he's some kind of celebrity or working for the ministry. Maybe he's an auror like Moody?" Harry speculated, eagerly.

"No, I don't think so, he was wearing muggle clothes. Do you think he's a muggle?" Ginny asked thoughtfully.

"I don't think he's either, or Mrs. Black wouldn't have reacted like that. That was scary!" Fred argued, immediately George joined in.

"I know what you mean, she even insults Dumbledore and McGonagall whenever she gets the chance. Judging by her reaction, he must be powerful!"

"Nah, she probably just had a heart attack that Sirius let a muggle into the house."

"You think he's a muggle?"

"Well, the fuss everyone made, you could think he is the minister himself, but no one of us has ever heard the name. So he must be muggle celebrity. That's where Hermione has heard the name." Everyone was looking at me questioningly now. I closed my eyes and tried to remember where I've heard the name before, but came up with nothing.

"But then where would he know McGonagall from? Did you see how they looked at each other? I mean he's really hot and all, but isn't she like twice his age at least?" Ginny added without thinking and then blushed when she saw Fred and George smirking. "What? It's true, he looks great! I'm sure Hermione agrees!" She defended herself. I just nodded, still lost in thought.

We were interrupted by footsteps coming up the stairs.

"That's mom, let's go in our room." Ginny whispered and tugged me along.

We spent the rest of the night speculating about the mysterious man, before we finally decided to go to sleep.

xxx

The next morning I woke when Ginny pulled away my covers.

"Come on Hermione, you've slept enough, let's go get breakfast!" She urged me on, already fully dressed. She seemed to nearly explode with excitement.

"What's the matter with you?" I asked her, still half asleep.

"Well, seeing as we spent days renovating another room, I think that guy from yesterday might have stayed overnight. Come on, hurry up, I want to meet him, maybe he'll answer some of our questions!"

I quickly rose and dressed, then let myself be pulled down the stairs by Ginny. It was still early, so none of the boys were awake yet.

As we entered the kitchen, we saw Mrs. Weasley was busy preparing breakfast, while Sirius was sitting next to Prof. Lupin at the kitchen counter, reading the prophet. Prof. Lupin just stared at Mr. Mikaelson suspiciously, looking as if he could be attacked at any time. Mr. Mikaelson was leaning elegantly against the kitchen wall, a Whiskey glass with a strange red liquid in his left hand. Was that beetroot or tomato juice? For breakfast? Urgh. Disgusting. Ah well, it had taken me time to get used to pumpkin juice too. He had turned to us, when he had heard us enter, his gaze was now fixed on me. He noticed me staring at his drink with distaste and smirked amused.

Now Molly saw us standing in the doorway.

"Ah, girls, you're up. Did you sleep well? We have a guest for the next week, until school starts again." She gestured to Mr. Mikaelson, not giving us a chance to answer.

"Hello. I'm Elijah." He introduced himself slowly and thoughtfully. "You are Hermione Granger, aren't you?" He asked, looking directly at me. I was baffled.

"Yeah, that's right. Do we know each other from somewhere?" I asked him curiously.

He smiled and seemed to think about what to say. "Not exactly, no. I used to be very close to your parents. But the last time I saw you, you were still a small baby."

Okay, WHAT?! He was friends with my parents? I knew all their friends. And they were all the same. Normal, muggle, upper middle class people. Ordinary.

Nothing about this guy was ordinary.

He didn't really seem to belong in this chaotic kitchen, with Mrs. Weasley, Sirius and Prof. Lupin. Something about him stood apart. It was not only his expensive suit or his good looks. There seemed to be an air about him, that made something inside me scream that he was dangerous and evil, and Prof. Lupin definitely seemed to feel the same. He looked ready to attack Elijah the second he even looked at us wrong. But another part of me felt like I could trust him completely, the way he looked at me told me that he would never hurt me and protect me with his life. That was strange. Who was he?

No friend of my parents knew about magic and surely none of them would show up at the headquarters of the order... But I've heard the name before, so maybe what he said was true, maybe my parents mentioned him once.

While I tried to figure Elijah out, he had started talking to Ginny. But every now and then he glanced at me out of the corner of his eye.

"... so why are you here?" She questioned him, curiously.

"Ginny! Leave our guest alone. And help me set the table for breakfast." Mrs. Weasley berated her and put a pile of plates into her arms. Ginny mumbled something and went to put the plates on the table. Elijah just took a sip of his drink and smiled.

"Oh, it is quite alright, Mrs. Weasley. I'm an old friend of your Professor McGonagall and, now that Voldemort has returned, she asked me to help protect Hogwarts and fight him. Since Professor Dumbledore couldn't find another - what did he say - 'competent' person, who was willing to take the job, he convinced me to become your new 'Defense Against the Dark Arts' teacher." He explained. Prof. Lupin's suspicious look turned angry.

"They're letting YOU teach? You're kidding right?! It's bad enough that Sirius let you into this house, now they want to let you into a whole castle full of kids? Doesn't he know who you are? Doesn't he know how dangerous that is? How long will it take until you kill someone, huh? And I thought Dumbledore was reckless when he hired me!" He growled at Elijah.

We all stared at him appalled. What was wrong with him? He acted as if Elijah were some kind of monster or something. Sirius put a hand on his shoulder to restrain him. He looked ready to attack Elijah at any moment. Elijah looked at him murderously, his eyes gleaming with an evil I've never seen before. He slowly pushed himself from the wall and made his way over to Lupin, like a predator ready to slaughter his prey. I stood there frozen, unable to move.

"Careful, little werewolf, or it will only take a few seconds and I could crush you with my little finger. I advise you to show a little respect." He was standing very close to Lupin now, staring him down. No sound could be heard in the room. All of us were holding our breaths. When Lupin adverted his gaze, Elijah smirked and put his glass down on the table. "Now, if you would excuse me." He smiled at us pleasantly and left the room without another word. The tension left the room instantly and we all visibly relaxed.

What was all that about? That guy was scary!

The rest of the breakfast went on in silence, until the boys all showed up, but Mrs. Weasley put a stop to any conversation about Elijah, always glancing worriedly at Prof. Lupin.

So I was left to my thoughts about our new teacher, who got more mysterious every second. How had he figured out Prof. Lupin was a werewolf? Had someone told him? And why did Lupin look as if he really hated the guy? Was he really that dangerous? Something told me that he was. He really had looked ready to kill Lupin. But still, he was a member of the Order, wasn't he? If Dumbledore trusted him, I would too.

But he also said he's a friend of my parents. And teaching at Hogwarts? So he couldn't be a muggle. Did my parents know that? No, they would have told me I think. MY PARENTS! Of course! I would just write them and ask them what they knew about him.

I wolfed down the rest of my breakfast, asked Harry if I could borrow Hedwig and sprinted upstairs to send the letter.

After I sent the letter, I went downstairs to help the others clean another room of this horrible house.

While we were cleaning I told the boys what had happened at breakfast.

"He fought with Lupin? And he's going to be the new teacher? Isn't he a bit young for that? Well I suppose he can't be any worse than Lockhart." Ron said, cheerfully.

"And he's even better looking than him." Ginny added and we all started laughing.

"Maybe you should go and ask him for a date while he isn't our teacher yet." Fred playfully suggested and Ginny threw her sponge across the room, with a splash it landed in his face. We others all started laughing even harder.

"Okay, well, up until now, we've had a guy with You-know-who on his head, a fraud, a werewolf and a deatheater as our teachers. What's next? A vampire? Or maybe a merman?" George joked.

"Oh come on, not even Dumbledore would do that!" I replied to his suggestions.

Absolutely ridiculous.