This is my first fanfic so please be nice. I've mostly ignored harry Potter canon to make it fit. Set just after The Last Olympian and in the Half-Blood Prince. All original pairings kept the same. No Thalico.

Disclaimer: I do not own Percy Jackson or Harry Potter if I did then… well you know what comes next.

Chapter 1: There's a Magic Train

Harry's POV

I was waiting for Hermione when I saw them. There were four of and all were all very muscular and tanned. One was obviously the leader; I don't know how I knew I just did. He had black hair like mine but his eyes were green like the sea. He had a green hoodie and jeans on. Next to him was a blonde girl. She had a grey t-shirt with an owl on it. She looked like a typical Californian girl but with stormy grey eyes. There was another boy but he was in black with an aviator jacket and shaggy brown hair and an olive complexion. Finally there was a tall girl in a silver parker with spikey black hair and a death to Barbie t-shirt that didn't go with the silver circlet in her hair.

They all looked very nervous. Green boy kept checking his pocket, owl girl kept checking something concealed in her sleeve. The boy in black kept fingering a skull ring and silver girl's hand kept drifting toward a silver bracelet. I wondered vaguely what they were all so worried about. Well except from Voldemort, and the seemingly random items they had wouldn't do much good against him.

They all looked familiar. Then I remembered I had seen them get off their plane. The guy with green eyes had looked incredibly relieved to be on the ground. Who were they? They were dressed too normally to be wizards but there was something about them that told me they weren't muggles either.

Percy's POV

Annabeth, Thalia, Nico and I had been called to the big house and we were waiting in the rec room. Chiron came in but before we could open our mouths he started talking. "Please don't interrupt while I explain." He started "Millennia ago Hecate blessed a few lucky mortals with the gift of magic." He then went on to explain that their magic is weaker and needs wands to use it. After he finished explaining that he started talking about some school, Warthogs or something and the boy who got chosen and some evil guy Mouldywart or something similar.

It took a while and when he was finished, being ADHD, I blurted out 'what's your point'. Then Chiron said the magic words. "You have been issued a quest by the Gods. You are to go to Hogwarts, pretending you are wizards, and try and stay there for as long as possible without revealing what you are. When and if someone figures it out show them. Don't hide anything." Then he sent us back to our cabins, looking pointedly at me when he said to go straight to bed. I still hadn't really paid any attention to the Achilles/rest thing. But he asked Annabeth to say behind.

The next morning we met at the pine tree. Chiron told us that our luggage would meet us there. It was then that I realised something. Warthogs was in England so we would be travelling a long way to get there. "How are we getting there?" I asked.

"Airplane, first class courtesy of Hermes."

"But Zeus-"

"Has given you permission to travel there and back in his domain," finished Chiron.

I didn't let go of the armrest until we hit the ground. Nico had been worried too and 3000ft up wasn't exactly Thalia's idea of fun. So most of us were very happy when we reached solid ground.

We camped out in London until the first September when we went to Kings Cross Station. When we went got there something hit me. "Where's our stuff? We're meant to be there for a year, we only have enough things to last a week." Thalia and Nico looked confused as well but Annabeth said "Chiron gave me some more details when you were gone. Someone will meet us here and give us what we need."

We looked around until we spotted someone who had every inch of skin covered. "Argus!" Annabeth shouted happily. Argus was pushing a trolley with four trunks on. One was green with a trident, another grey with an owl. There was one that was black with a skull and the final one blue with a lightning bolt. We didn't need to guess whose was whose.

Harry's POV

I was at Kings Cross when I saw them again. They were talking to a man with four trunks and clothing covering all his skin. I could tell they were less nervous and something about them made me curious. I drew closer and listened in "Gods Chiron, you might as well write them a letter," the blonde one said. I didn't understand this, but then I spotted Ron and went over to him.

Percy's POV

We had a look at the tickets that Argus had given us. It took us a while to decipher them but then I said "Is it me or does that say platform 9 ¾ ?" No one seemed to be able to explain it so we looked around for some sign of what to do. Nico spotted a bunch of redheads walking towards the barrier between 9 and 10. "Well," Thalia said, "one of us has to go first to check it works." They looked at me. "Oh Fine!" I started walking towards the barrier. "Stupid curse of Achilles… why do I have to be invulnerable…" I walked through and came to a platform filled with smoke and shrieking kids, Annabeth came in behind me and gave me a kiss. Soon Thalia and Nico were there as well. We lifted up our trunks. It didn't seem like anything to us compared to full battle armour but we got strange looks as if we shouldn't be able to do that. "Let's get on the train. We're only going to get stared at," said Annabeth.

We were about to get on and look for an empty compartment but then I realised something. "How are we meant to do magic?" Nico and Thalia looked worried at that too but Annabeth looked untroubled by this question. "Lady Hecate has given us her blessing so we will be able to have the same powers as the wizards. Now are we getting on this train or what?"

Hermione's POV

I met Harry and Ron at the platform and we stood there discussing our summers until we realised that we had about five minutes to get on the train.

We had looked in all the compartments but one. There were voices coming from it but we had no choice. We opened the door and found four kids there. They looked about sixteen and all of them were extremely good looking. They stopped talking when we came in. "Do you mind?" I asked, "Everywhere else is full."

"Sure," said the blonde one. I didn't recognise any of them so I asked them where they had gone before Hogwarts. They looked at me blankly for a minute until one of them answered. I continued to question them, eager to know more about how they were taught. After a while I paused to think of my next question and they suddenly restarted their conversation. "Happy now, Seaweed Brain?" asked the girl with electric blue eyes and black spikey hair. "Shut up Pinecone Face," he said. "Oh come, were you or were you not panicking about how we were getting there?" said the blonde girl. "You'd be too if you'd get blasted out of the sky. I'm surprised Death Boy wasn't more worried." He returned. "He'd never do that with me there!" shouted the black haired girl. "I wouldn't put it past him." He muttered, the sky rumbled. "Okay! Okay! I'm sorry!" he said something under his breath and I caught 'so much for gratitude' they all seemed to find what he said hilarious. "At least I wasn't illegal," said the Boy with brown hair and eyes like black pits. After a while he spoke again. "How long 'til we get there?" he seemed to direct this to the blonde girl. "I'm not sure but at least half and hour."

"Thanks Wise Girl."

"If it's that's long I'm going to sleep," announced the boy with green eyes. He rested his head on the blonde girl's shoulder and was asleep within seconds.

When we reached Hogsmeade we left before the four got off and managed to get a carriage to ourselves.

"The one in blacks a Death Eater," said Ron immediately.

"Ron!" I admonished, "But they do have strange nicknames," I conceded.

"I've seen them before," said Harry quietly.

"Where?" demanded Ron.

"Airport, getting off a plane." Ron looked disappointed that they hadn't been somewhere worse.

Authors Note: Okay what do you think? Sorry if the characters are OOC I didn't do this on purpose. It might be a while before I update again but this is because I'm writing it down then updating. I did this now because I had a bit of writers block and I thought this would help… actually it has. So please review. Even though I've already written it doesn't mean I can't change it to improve it.