Before we start I wanted to say this is my first fanfic, and I would love for you to tell me your thoughts on it! Now, let's see, who in the Hades is this kid?

Who is this kid?

-P.O.V. Harry Potter-

Potions was almost over, then I'd have Quidditch Practice. But still, Snape made it hard for me to focus on later when he was so evil now. "Potter!" he shouted.

"Yeah?" I replied, rather rudely I must say, but after not being allowed to go to Hogsmeade, and the beetle-eyed idiot known as Trelawney predicting my death in a bunch of soggy tea leaves, I wasn't in a good mood. The Gryffindors looked shocked, and the Slytherins were smirking. Big fat surprise, Draco was chatting and laughing to Crabbe and Goyle right under Snape's abnormally large nose and he wasn't even batting an eyelid. "Yes, sir, for future reference Potter. Now, can you read instruction four on the board, Potter?" Drat. It said stir counterclockwise four times, the clockwise, once. I knew I did it wrong now, counterclockwise 5 times. It was no wonder my potion was a vomit-green, not the lime shade it described in the book. Should have asked Hermione, I thought to myself. Just when I thought I'd be scrubbing the Trophy Room all night (but hey, I was used to manual chores because of the Dursleys), a fifteen-year-old boy with dark hair and sea-green eyes stepped into the cold, dark dungeon. "Hey, sorry to interrupt sir, it seems like a really nice lesson in here, but can I borrow a, wait, hang on a sec." He took about 50% of the lesson trying to read the parchment in his hand, and then I heard Hermione mutter something – an incantation. "Oh yeah! Can I please have a Mr Harry James Potter? Sorry, couldn't read it for a second," He looked at our confused faces, "I'm dyslexic." Right. That explained it. I stood up, about to go with this 5th year kid (at least, I assumed he was 5th year) when Snape asked him "I was just about to ask Potter a question. Who are you and why do you need to take Potter away?"

"Perseus Jackson, son of – wait, that's irrelevant. 7th year Gryffindor

. Professor Dumbledore want to see him sir, he says it's very urgent." He replied. So he was 7th year. Small for his age, then. "And he'll be needing his bag." I picked up my bag and followed Perseus out into the unknown. Well, Dumbledore's office wasn't unknown, but I've never seen this kid before in the Gryffindor common room. And I wonder what he meant by 'son of – wait, that's irrelevant'. I wondered what awaited me beyond the door of the classroom… probably just the familiar corridor, but still. After the Chamber of Secrets, and what Voldemort used to be like, I knew that looks could be decieving.

-P.O.V. Percy Jackson-

Damn, was that teacher mean! Not even Mrs Dodds… wait, yes Mrs Dodds was worse. That teacher hadn't tried to kill me, in fact, no one had so far today! My luck was getting better. But no, I could see a murderous baby cyclops from a mile away. And in that class, there were two, laughing with this blonde kid who looked like he thought he owned the world. The Fates were being kind of cruel to me like: You've been to Tartarus and back, experienced so much trauma you're scarred for life! Here you go, more reasons to be looking over your shoulder for eternity. The kid next to me looked about 13. I don't know why Chiron needed to see him, but from the look on his face, it was big. Hopefully not as big as the Great Prophecies. I didn't want this kid to be more famous than me, if I do say so myself. "Should I call you Percy, or Perseus?" The kid asked.

"Percy, please. And why was that teacher so cruel to you?" I asked. The kid looked at me like I was insane. Jeez, just trying to ask a question. "If you were really a Gryffindor, especially one who'd been here for 7 years, you'd know. Just look back to literally any potions lesson you've ever had and you'll get it. Unless somehow your memory has been wiped." He said rudely. I wanted to say many things to him, mostly been there, done that and hey! I'm the sassy one here! They don't call me 'Persassy' for nothing. I took the time to inspect the kid. Hey, I was bored, the kid had clearly closed the conversation, and my ADHD brain was running out of things to stare in awe at. The paintings talked, ghosts wandered through walls (my good friend Nico di Angelo would love that), and I swear on the Styx that the staircases moved. The kid had jet-black hair, and startling green eyes. His were like emeralds, where mine was like the ocean. Also, he had a scar, the lightning bolt of Zeus. I'd kept this a secret, but when I first came to Camp Chiron asked me if I had a scar of a skull, a lightning bolt, or a trident. Maybe this kid was why. "Hey, Dumbledore's office is that way." He said, pointing in another direction. I turned that way, only to find a guy holding my nose and screaming "GOT YOUR CONK!" and the kid started laughing like crazy as the guy flew? away, just to stop when he realised I wasn't shocked, or angry. "Let's go to Chiron and Dumbledore now." I said, completely unamused.

When we arrived, after walking down long hallways, with suits of armour that moved, and a cat that the kid said he wanted to kick, Chiron wasn't in his centaur disguise. "Chiron, what? There are mortals here!" I shouted. What was he thinking prancing around (pun intended) without looking like an old man. "Percy, there are two reasons for this. One, it seems even Hephaestus's electric doesn't work here."

"Yes, Perseus," an old man said, "unfortunately muggle – I mean, mortal electrics do not work here because there is too much magic." The guy looked like a thin, wiry Father Christmas with a beard and hair longer than Rapunzel's. Chiron continued "And, they have centaurs here in the forest. They are, er, less crazy, I think is the right word, than the Greek centaurs, but are more bloodthirsty too."

"Hey, Firenze isn't bloodthirsty! He saved my life!" Harry interjected.

"But, like all things, there are some exceptions." Chiron continued, "Harry, Percy, you are probably wondering what is going on. Well, for one, Harry is a half-blood.

"Sorry to interrupt, but I think we all know of Harry's blood status." Thin Santa said.

"No, no, Dumbledore, it's quite alright. What I mean is a demigod. Half Greek God, and it seems half wizard. Harry, your father is a God, and judging from a prophecy I heard ages ago, and that scar on your head, I know just who your father is." Chiron said.

I hope you like it! Can you guess who Harry's father really is? And if it's a God, then why does he look so much like James? And what is this prophecy that Chiron mentioned? Find out all this and more, next time I'm not lazy enough to post this!

So I made up this prophecy in the shower (please don't judge) and Chiron heard it from the God Apollo centuries ago. This is set during the Prisoner of Azkaban, and after the Heroes of Olympus. I know the entire Harry Potter series is set before the Percy Jackson series, but to make this crossover better, I set it during this. Please be sure to follow, favourite and review for more!