Hey you guys this is a Harry Potter Percy Jackson crossover. WARNING: Contains Original Character. Like every other Fanfiction I have written...

Note: this takes place during Harry's first year at Hogwarts.

Extra note: When I say Percy Jackson I include Kane Chronicles and possibly Magnus Chase

Disclaimer: I do not own any of these stories A.K.A anything you recognize is not mine! All rights go to Rick Riordan and J.K Rolling.

Enjoy!

Harry

Harry was really starting to wonder if strange things would ever stop happening to him. It started when she fell out of thin air and ran straight into the wall at Kings Cross Station. She stumbled and fell down groaning.

Her hair seemed to be between red and blondish-brown, she had pale skin, she was wearing a black denim jacket, blue jeans and a dark grey skull T-shirt. Around her neck hung a silver necklace with an Egyptian symbol on it, next to that was a leather band with four clay beads on it. A leather strip was tied around her hand, the other end was connected to a Hogwarts trunk.

She groaned and sat up rubbing her head, she opened her eyes and Harry tried to stifle a gasp. They were shimmering silver with streaks of black in them around the iris was a ring of electric blue. The ring around the iris's was like lightning, it shot through me like my scar had suddenly come to life.

She saw me staring at her and her eyes instantly narrowed. She shook her head and stood up unsteadily. Her eyes seemed to be analyzing everything about me. I was suddenly very self conscious. She snorted humorously and I felt my cheeks redden. She smirked, clearly amused made her way through the crowd to me.

"Hey." She said.

I didn't reply. Her accent was definitely American.

"Hello?" She waved her hand in front of my face. She leaned back, arms crossed. "Guess we've got a mime."

I blinked in confusion

Her face turned into a mask of mock surprise. "He moves!"

I said something real intelligent like, "Errrr….."

She laughed. I couldn't help but realize how wonderful her laugh sounded. "Hi, I'm Willow. Everyone just calls me Will though."

"Um, Hi my name's Harry." I mentally cursed myself for sounding so stupid.

She sighed. "So I take it from your trunk that you were accepted too?"

I nodded.

She sighed in relief and looked like the weight of the world was just lifted off her shoulders, and if possible was even more carefree than before. "So you have any idea where platform nine and three-quarters is?"

I shook my head. "My uncle dropped me off laughing and telling me to have fun." ( I think that was it correct me if I'm wrong.)

She snorted. "Sounds like my grandfather."

Willow glanced at the clock. "Styx! We'd better finbd out about the platform soon we've got six minutes."

I froze, six minutes! My mind went into override, Hagrid must've forgotten to mention something about the train. I glanced at Willow she was busily inspecting her ticket hoping for any clue as how to get onto the platform.

"-packed with muggles of course-"

They swung around the speaker was a plump ginger woman leading several red-head children in her wake. They each pushed a cart like Harry's and also had an owl.

Harry and Willow shared a glance then started after them. They stopped in front of a wall.

"Now, what's the platform number?" said the boys' mother. "Nine and three-quarters!" piped a small girl, also red-headed, who was holding her hand, "Mom, can't Igo... "

"You're not old enough, Ginny, now be quiet. All right, Percy, you go first. "

Willow jumped at the name then realizing that she didn't know him seemed to relax.

What looked like the oldest boy marched toward platforms nine and ten. Harry watched, careful not to blink in case he missed it - but just as the boy reached the dividing barrier between the two platforms, a large crowd of tourists came swarming in front of him and by the time the last backpack had cleared away, the boy had vanished.

"Fred, you next, " the plump woman said to one of her sons.

"He's not Fred I am!" Said another boy who looked like his twin.

The first boy sighed. "Honestly woman you call yourself our mother."

She sighed. "Oh sorry George"

"Only joking, I am Fred, " said the boy, and off he went. His twin called after him to hurry up, and he must have done so, because a second later, he had gone - but how had he done it?

Now the third brother was walking briskly toward the barrier he was almost there - and then, quite suddenly, he wasn't anywhere.

There was nothing else for it. Willow glanced at me and I gestured towards the woman and mouthed, Be Nice. She looked at me, smirking as if asking me if I'd actually just said that.

"Excuse me, " I said to the plump woman.

"Hello, dear, " she said. "First time at Hogwarts? Ron's new, too. "She pointed at the last and youngest of her sons. He was tall, thin, and gangling, with freckles, big hands and feet, and a long nose.

"Yes, " I said . "The thing is - the thing is, I don't know how to - - "

"How to get onto the platform?" she said kindly, and I nodded. "Not to worry, " she said. "All you have to do is walk straight at the barrier between platforms nine and ten. Don't stop and don't be scared you'll crash into it, that's very important. Best do it at a bit of a run if you're nervous. Go on, go now before Ron."

"Er - okay, " I said. I pushed my trolley around and stared at the barrier. It looked very solid. I started to walk toward it. People jostled me on their way to platforms nine and ten. I walked more quickly. I was going to smash right into that barrier and then I'd be in trouble - leaning forward I broke into a run and closed my eyes waiting for impact. It didn't come. I opened my eyes and looked around a scarlet steam engine was waiting next to a platform packed with people. A sign overhead said Hogwarts Express, eleven O'clock. I looked behind me and saw a wrought-iron archway where the barrier had been, with the words Platform Nine and Three-Quarters on it, I had done it. Smoke from the engine drifted over the heads of the chattering crowd, while cats of every color wound here and there between their legs. Owls hooted to one another in a disgruntled sort of way over the babble and the scraping of heavy trunks. The first few carriages were already packed with students, some hanging out of the window to talk to their families, some fighting over seats. Then Willow slammed into me from behind.

"Oh gods! Oh! Are you okay?" She asked helping me up.

I groaned and nodded.

She sighed in relief. "Thank goodness. Come on lets find a seat."

I pushed my cart down the train searching for an empty seat.

Willow sighed. "I'll meet you in a compartment."

Then she was gone. I passed a round-faced boy who was saying, "Gran, I've lost my toad again. "

"Oh, Neville, " I heard the old woman sigh.

A boy with dreadlocks was surrounded by a small crowd.

"Give us a look, Lee, go on. "

The boy lifted the lid of a box in his arms, and the people around him shrieked and yelled as something inside poked out a long, hairy leg. I pressed on through the crowd until I found an empty compartment near the end of the train. I put Hedwig inside first and then started to shove and heave his trunk toward the train door. I tried to lift it up the steps but could hardly raise one end and twice I dropped it painfully on my foot.

"Want a hand?" It was one of the red-haired twins I'd followed through the barrier.

"Yes please." I panted.

"Oy, Fred! C'mere and help!" He yelled over his shoulder.

With the twins' help, my trunk was at last tucked away in a corner of the compartment. "Thanks, " I said, pushing my sweaty hair out of my eyes.

"What's that?" said one of the twins suddenly, pointing at Harry's lightning scar.

"Blimey, " said the other twin. "Are you"

"He is, " said the first twin. "Aren't you?" he added to me.

"What?" I asked.

"Harry Potter, "chorused the twins.

"Oh, him, " I said. "I mean, yes, I am."

The two boys gawked at him, and I felt myself turning red. Then, to my relief, a voice came floating in through the train's open door.

"Fred? George? Are you there?"

"Coming, Mom. "

With a last look at me, the twins hopped off the train. I sat down next to the window where, half hidden, I could watch the red-haired family on the platform and hear what they were saying.

Their mother had just taken out her handkerchief. "Ron, you've got something on your nose. "

The youngest boy tried to jerk out of the way, but she grabbed him and began rubbing the end of his nose.

"Mom - geroff" He wriggled free.

"Aaah, has ickle Ronnie got somefink on his nosie?" said one of the twins.

"Shut up, " said Ron.

"Where's Percy?" said their mother.

"He's coming now. "

The oldest boy came striding into sight. He had already changed into his billowing black Hogwarts robes, and Harry noticed a shiny silver badge on his chest with the letter P on it.

"Can't stay long, Mother, " he said. "I'm up front, the prefects have got two compartments to themselves- - "

"Oh, are you a prefect, Percy?" said one of the twins, with an air of great surprise. "You should have saidsomething, we had no idea. "

"Hang on, I think I remember him saying something about it, " said the other twin.

"Once - - "

"Or twice - - "

"A minute - - "

"All summer - - "

"Oh, shut up, " said Percy the Prefect.

"How come Percy gets new robes, anyway?" said one of the twins.

"Because he's a prefect, " said their mother fondly. "All right, dear, well, have a good term - send me an owl when you get there. "

She kissed Percy on the cheek and he left. Then she turned to the twins.

"Now, you two - this year, you behave yourselves. If I get one more owl telling me you've - you've blown up a toilet or - - "

"Blown up a toilet? We've never blown up a toilet. "

"Great idea though, thanks, Mom. "

"It's not funny. And look after Ron. "

"Don't worry, ickle Ronniekins is safe with us. "

"Shut up, " said Ron again. He was almost as tall as the twins already and his nose was still pink where his mother had rubbed it.

"Hey, Mom, guess what? Guess who we just met on the train?" I leaned back quickly so they couldn't see me looking.

"You know that black-haired boy who was near us in the station? Know who he is?"

"Who?"

"Harry Potter!"

Harry heard the little girl's voice. "Oh, Mom, can I go on the train and see him, Mom, eh please... "

"You've already seen him, Ginny, and the poor boy isn't something you goggle at in a zoo. Is he really, Fred? How do you know?"

"Asked him. Saw his scar. It's really there - like lightning. "

"Poor dear - no wonder he was alone, I wondered. He was ever so polite when he asked how to get onto the platform. And then there was that other girl, like I was royalty or something."

I blinked, Willow was polite?

"Never mind that, do you think he remembers what You-Know-Who looks like?"

Their mother suddenly became very stern.

"I forbid you to ask him, Fred. No, don't you dare. As though he needs reminding of that on his first day at school. "

"All right, keep your hair on. "

A whistle sounded.

"Hurry up!" their mother said, and the three boys clambered onto the train. They leaned out of the window for her to kiss them good-bye, and their younger sister began to cry.

"Don't, Ginny, we'll send you loads of owls. "

"We'll send you a Hogwarts toilet seat. "

"George!"

"Only joking, Mom. "

The train began to move. I saw the boys' mother waving and their sister, half laughing, half crying, running to keep up with the train until it gathered too much speed, then she fell back and waved. I watched the girl and her mother disappear as the train rounded the corner. Houses flashed past the window. I felt a great leap of excitement. I didn't know what I was going to but it had to be better than what I was leaving behind. The door of the compartment slid open and the youngest redheaded boy came in.

"Anyone sitting there?" he asked, pointing at the seat opposite me."Everywhere else is full. "

I shook my head and the boy sat down. He glanced at me and then looked quickly out of the window, pretending he hadn't looked. I saw he still had a black mark on his nose.

"Hey, Ron. "The twins were back.

"Listen, we're going down the middle of the train - Lee Jordan's got a giant tarantula down there. "

"Right, " mumbled Ron.

"Harry, " said the other twin, "did we introduce ourselves? Fred and George Weasley. And this is Ron, our brother. See you later, then.

"Bye, " Ron and I said.

The twins slid the compartment door shut behind them.

"Are you really Harry Potter?" Ron blurted out. I nodded. "Oh -well, I thought it might be one of Fred and George's jokes, " said Ron. "And have you really got -you know... "

He pointed at my forehead. I pulled back my bangs to show the lightning scar.

Ron stared. "So that's where You-Know-Who"

"Yes, " I said, "but I can't remember it. "

"Nothing?" said Ron eagerly.

"Well - I remember a lot of green light, but nothing else. "

"Hi Harry." Willow stood by the door.

"Hey Willow."

She frowned. "It's been a while someone's called me that."

"What?"

"Only my dad calls me Willow and I hardly ever see him."

Thunder rolled.

"Oh shut up you know it's true." Willow muttered under her breath.

"Uhh..."

Willow blinked. "Who's this?"

"I'm Ron Weasley."

She grinned, "Willow Black."

Ron squeaked. "Black?"

Willow tilted her head to the left, "What?"

"Who's your mom?"

She frowned. "I never met her but her name was Bellatrix."

"What!"

HaHa

I got it I have temporarily gotten obsessed with Harry Potter, so Later you guys.

Question: Who do you think Willow's Olympian parent is?