A/N: 'Ello, 'ello, and welcome, new and old readers of mine. This is a Percy Jackson/Harry Potter crossover series (well, not really crossovers. The characters don't meet that much and it's more of just a person that lives in two worlds). I've read the Percy Jackson series over the week of Christmas and have myself HOOKED. While it will hint for Apollo/OC, my character's still much too young for that romance, so it'll mostly be Friendship/Adventure. ;)

Just a warning, this is un-BETAed. Please tell me if there are any mistakes you spot. :D

And now, onto the story~

"I… uh… I mean… Well, actually, yeah. That's rude."

I frowned as I looked at the pages of my summer homework. The words just floated off the page, and I couldn't concentrate at all.

It was then at that moment, something came flying through my window. My ADHD kicked in and I jumped out of my seat, landing on my floor with a thud before rolling into a defensive position.

I heard hurried footsteps rush to my room, and my door was thrown open by my older twin brother, Percy. "Penny!" he exclaimed. "Are you okay?!"

"Oh, dear," my mom said, rushing over to me. She helped me stand up and brushed the non-existent dirt off of my clothes. "What happened?"

"I… I was just trying to do homework," I worked out in my head, mind reeling a thousand miles per minute. "Then something went flying towards me through the window so I ducked."

Percy walked over to my desk and looked at whatever landed on there. "Hey… there's a letter to her," he commented, picking up a small, rectangular envelope.

He handed it to my mom, who looked at it for a second before handing it over to me. I blinked and looked at what was addressed to me, and for some odd reason, I could understand it.

Miss P. Jackson
Third Bedroom on the Left
20798 52nd Street
Manhattan, New York, USA

I looked at the envelope wearily, then at my mother and brother. "... It's not gonna explode, is it?" I asked cautiously.

Mom opened her mouth to say something, but she was cut off by a knocking on the door. She got up, kissed both of us on the forehead, before walking out the room to answer whoever was on the other side.

"You probably have a stalker," Percy said, glancing out the window. He walked over to it quickly and closed it, shutting the curtains in the process.

I frowned. "That doesn't sound pleasing."

"Percy! Penny! Could you both come out here, please?" my mom called from the living room. Her voice was a bit shaky, so Percy and I quickly got up to go check her out.

As we got to the living room, I spotted a tall, thin man with long silver hair and an equally long beard, with spectacles that rested on a slightly crooked nose and framed sparkling, blue eyes. He was wearing a set of purple robes, which was really weird, considering it was summer in Manhattan.

"Hello, Perseus, Penelope," the man greeted us kindly. He spotted the letter in my hand and said, "Ah, I see you've gotten your letter. Would you be so kind and read it?"

"It might explode, though," I said bluntly, looking at the man. "Who are you?"

"Professor Albus Dumbledore," the man greeted us.

Percy hid a laugh behind his fist and I elbowed him. "Ow," my brother groaned.

"Professor of what, exactly?" I interrogated. "What are you doing here?"

"Many of your questions will be answered in the letter," Dumbledore said, gesturing to the letter. "If you would be so kind, Miss Jackson."

I looked at the old man and said, "I can't read. I'm dyslexic."

"I believe you'll find this letter simple to read," Dumbledore replied, and gestured to the letter again. I turned to my mother, who nodded at me encouragingly. I nodded back before exhaling deeply and opening the envelope.

When the words didn't float off the page, I realized I could understand it just perfectly:

HOGWARTS SCHOOL
of WITCHCRAFT and WIZARDRY
Headmaster: Albus Dumbledore
(Order of Merlin, First Class, Grand Sorc., Chf. Warlock, Supreme Mugwurmp, International Confed. of Wizards)

Dear Miss Jackson,

We are pleased to inform you that you have been accepted at Hogwarts School of Witchcraft and Wizardry. Please find enclosed a list of all necessary books and equipment.
Term begins on September 1. We await you owl by no later than July 31.

Yours sincerely,
Minerva McGonagall,
Deputy Headmistress

"Hogwarts?" Percy echoed first. "What in the Hades is Hogwarts?"

"It is a school that teaches young wizards and witches of witchcraft and wizardry. In other words, Miss Penelope Jackson," he said, turning to me with twinkling eyes, "you're a witch."

I didn't know what to say, so I said the first thing that popped into my head, "That's not a really nice thing to call someone." Dammit. "I… uh… I mean… Well, actually, yeah. That's rude."

Dumbledore chuckled before saying, "My apologies, but in my world, witches and wizards are very common. It is not a derogatory term of any means."

"But, I'm not a witch," I said cautiously, looking at Dumbledore. "I'm just Penny."

"Well, Penny, have strange things ever happened to you? Besides in water?" Dumbledore inquired. "When you feel intense emotions?"

"The kitchen exploded all on its own!" I countered back. "I didn't do anything!"

"Yes," Dumbledore nodded. "Exactly. That was magic."

I blinked. "So I'm a witch?" Dumbledore nodded. "Cool," I accepted. Hey, if you can't beat 'em, join 'em. "So… what do I do now?"

Dumbledore smiled patiently. He gave Mom a bag and my mother opened it. "Ash?" she inquired.

"That is Floo Powder," Dumbledore informed. "Before September the first, please go to Diagon Alley. You simply take a handful of that powder, and state very clearly where you want to go. In your case, it would be Diagon Alley. I believe there is a shopping list as well as instructions written in there."

"Can I come too?" Percy asked eagerly. "Well, do Diagon Alley at least, since I'm obviously not a wizard." He turned to me, "Man, you're lucky."

"Of course," Dumbledore nodded his head. "But this is a secret. You must not let anyone outside your family know your sister is a witch. It could compromise the magical world and throw the world in an upset of balance. We wouldn't want that to happen, now would we?"

Percy shook his head. "No, we wouldn't."

Dumbledore smiled again. Man, does he ever stop. "Well, Penelope, I look forward to seeing you on your first day of Hogwarts. Have a good day." And right before our very eyes, he vanished.

Silence filled the room, and it made me very jittery, like it always did.

"That really happened, right?" Percy inquired.

"Yes, Percy," Mom said slowly. "It did."

"That's so cool!" Percy exclaimed, hugging me. "My sister's a witch!" He turned to Mom, "Mom! Penny's a witch! She'll probably learn to fly on a broom and everything!" That made my mother crack a smile and she hugged us both.

"We'll go to Diagon Alley in August," my mother informed us. "Gabe will be working that whole day and I'll take a day off."

POSEIDON

"Looks like your daughter's a witch," Hermes commented from beside me.

"So she is," I agreed, nodding my head. As a demigod and a witch, I'm afraid Penny would be in much more danger, even more so because she is my daughter.

"You don't know how much," Apollo commented, walking over and joining us. He let out a low whistle at the image before us.

"She is eleven, Apollo," I turned to my nephew, who just shrugged. I shook my head. Gods. Can't just keep it in their pants. Well, that was rather hypocritical of me, but regardless.

"No harm in looking," Apollo countered. He chuckled again before it abruptly stopped. His eyes glazed over and he stared into nothingness, his eyes glowing a faint white. It was no more than a few seconds before he shook his head, clearing his thoughts.

"Another prophecy?" Hermes inquired. "Which being is it this time?"

Apollo slowly turned his head, to glance at Penny. "Her."

Dread filled through me. "My daughter?" I double-checked.

Apollo nodded. "And me."

"What was it?" I demanded.

"Daughter of the Sea, born as one in two's world,
Lord of the Light, to her he will be hurled,
She will stop a darkness that will arise,
And discover what she will find in the skies."

"Skies?" Hermes cocked his head. "I think Zeus will shoot her down before she even gets a chance." I glared at him. "Sorry," he apologized sheepishly.

A/N: Short intro fic. Think of it as a pilot chapter. :P Thoughts? If you guys like it, leave a review, favorite, or follow it! I'll definitely post the new chapter up next week if I feel like you guys like it! :D