Hello everyone! This is my first fanfic so constructive criticism is gladly accepted. And go easy on me, I'm only 10. I'm hoping to update at least once a week, maybe more. Anyway, to the story. Oh, and almost forgot. All characters belong to Rick Riordan and J.K. Rowling. Please read and review. When I update, I just post what I got, so don't expect cliffhangers or anything. I can try, though. I try to make chapters as long as possible.

Percy POV

Five months after the Giant War, with 2 of them being tortured in Tartarus, I would say I'm doing pretty good. Minus the violent flashbacks and nightmares. But just because I'm better doesn't necessarily mean I can handle another world. And more enemies. Bummer. It all started when I come into my own house to come face to face with strangers. They always say something like 'stranger-danger'. And I should've listened. Because this danger is probably going to be stick waving maniacs who think they can take me down just because they can do magic.

Harry POV

When Professor Dumbledore summoned the Order of Phoenix, I couldn't help but wonder what this was about. But I was caught off guard by one sentence, that changed everything.

"Voldemort has a grandson, by the name of Perseus Achilles Jackson."

~~~~~~~~~TIME SKIP~~~~~~~~~

And so here we are, at the door of my worst enemies grandson, with Dumbledore, Remus, and Sirius. When Remus knocked, it was immediately answered by a woman that looked nothing like Voldemort. For a split second I considered the thought that maybe this Percy wasn't like Voldemort at all. I shook my head at such thoughts. Percy has to be evil. Right?

"Hello", said Dumbledore,"we're looking for a woman by the name of Sally Jackson-"

"Sally Blofis."

"Yes, now, I'm assuming that's you?"

"Yeah, and please come inside. I've been keeping you talking for too long."

When we entered, I could feel an aura from somewhere. Like it's rubbed off on the walls, or something. It was an average apartment, to say the least. Sally's voice interrupted my thoughts.

"Who are you and why are you here?"

After some silence, Sirius answered

"We are looking for your son, Percy Jackson."

About an hour later, we heard the door open and bang close. We heard footsteps down the hall, and a boy about 17-18 entered the room. He had sea green eyes, but something in them seemed, broken. He had black, windswept hair, and a natural tan. One that you can only get under the sun. He was strong, but he was also wary. Like we could stand up at any time and try to kill him. He plopped down on the couch and before he could speak, Remus asked,"Are you Percy Jackson?"

Percy POV

"Yes.", I replied.

The kid that looked like a scrawnier version of me muttered something under his breath. I ignored him and got to the real bugger.

"Who are you and why are you here?

"Well, Percy, we are wizards. I am Sirius, Remus, Dumbledore, and Harry. And we found out from recent records that you have a Grandfather that is a wizard.", Sirius replied

"On which side of my family?" He asked, as if stuff like this happened everyday.

"Your mother's side."

"Oh."

"He was also head boy, and won an award for…", Remus started ranting.

I was starting to think that Percy might not have any relation to Voldemort. That is, until he started convulsing, and then, out of nowhere, started screaming

Percy POV

After Remus started ranting, I zoned off, mainly concentrating on not submitting to the flashback. But it caught me off-guard.

"AAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHH "

I was in Tartarus with Kronos and his scythe, him carving the words, Eternal Pain, as Hyperion whips me as I cry out in protest. I look up to see Annabeth, being whipped by Atlas as she screams.

"Not him! Please not him!"

When I came to my senses, I found the wizards looking at me in utter shock. Before they could start asking questions I replied shakily,"I'll tell you if you swear on the river Styx to not tell anyone unless I give you permission to."

After they all swore, Percy asked," Have you ever heard of the Greek gods?"

"What does that have to do with this." Harry snarled

"You lost somebody.", Percy observed

"Yeah, your f**cking grandfather came and murdered my parents!"

"Listen,- wait, what! He wouldn't do that!"

"Well, he did"

I was just standing there in shock. My grandfather. The one who inspired me to become something to the world.

"Anyway, the Greek gods are real,", Sally continued for her son,"Percy here is a demigod son of Poseidon, the God of the seas. Percy has been through two wars…"

I zoned out after that, thinking about grandpa Tom.

Harry POV

After the explanation from Sally, I began to feel sorry for him. I mean, going through pain for the rest of his life and hell? And I can't believe I never noticed the bandaged arm and the scars!

Once we took him into the Burrow, Ron and Hermione immediately took me over before I could say sorry, and began to ask me questions. Before they could start, however, I interrupted them by saying,"Percy is a good guy and-"

"How do you know? He could kill us in our sleep!"

"Seriously Ron, be reasonable."

"Children, it is time to go to diagon alley", Molly shouted

About 3 hours later, we had all our supplies. Percy got a new wand, a driftwood with a Pegasus feather, because his "old one" broke. The twins have taken a real liking to him and offered to show him the pranksters shop they opened. Percy accepted, and when he came back, he had a huge grin. He muttered something like "making money" and "selling ideas to the stolls"

Percy POV

Tomorrow is September 1st, the day we get to ride the train to Hogwarts. From the rumors I heard, the train ride is 7 hours long. I hope not. Only Annabeth can keep me relaxed for that long.

~~~~~~~~~~~~~~~~~time skip~~~~~~~~~~~~~~~~

Turns out, it is seven hours long.

"Why do you look so disappointed?",asked Hermione.

We were on the train a couple minutes early.

"I'm ADHD"I replied.

Suddenly the door opens and some guy with blond hair and his "bodyguards" stand there just trying to look superior. He smirks at me and extends his hand.

"Draco. Draco Malfoy. I'm the son of one of the richest men in the entire wizarding community."

"I can tell. Saying your name twice and all that."

"You might need new friends. I can help you there", His arm still extended, " stay away from these mudbloods and pure blood traitors , and-"

"What did you call them?"

My voice was quiet, yet very menacing, and my glare wasn't that high on the "seaweed scale", as Leo nicely called it. This is the list of the glares and their rank, with ten being the least, and one being the most, terrifying.

10: when someone, aka Leo, starts annoying me with jokes and after he has coffee or sugar

9: when someone aka Aphrodite, mentions how cute Annabeth and I are together

8: when someone aka Jason or Thalia, say air disasters are better than sea disasters

7: when someone mentions the second Titan war knowing what happened

6: when somebody says that horses should be domestic pets

5: when someone mentions the second giant war, knowing what happened

4: when someone mentions Tartarus, fully knowing what happened there

3: when someone threatens Annabeth or Sally

2: when someone tries to make a move on Annabeth

1: when someone hurts Annabeth or Sally in any way

I gave him a glare at stage nine, and that almost made him pee in his pants and wish he had never been born to say that.

Yep. The level of my glares.

He quickly ran off, but before he could, I judo-flipped him. And now gave him a full 8. And now he was whimpering.

"Leave my friends and I alone."

I socked him in the gut, gave him a bloody nose, and socked him in in the stomach. I gave him a a level 9 glare, and he ran off, saying something like,"My father will hear about this!". I almost laughed, I think Harry did too. My dad was a GOD. And he thinks he can scare me just like that, eh?

When I got back into the compartment, still eyeing the door, when I heard applause. I got out, and found a ton of people that have been watching the fight, clapping, and some people whistling. I took a little bow and retreated back into my compartment, with crys of "he's HOT"and "wonder if he's taken". I scowled. I poked my head out and said"I'm taken". As I was sitting down, I heard Ron say in shock,"Bloody hell…That. Was. Freakin. Awesome."

Meanwhile, Hermione asked me,"When did you learn to judo flip?"

"My girlfriend taught me. Heck, she showed me up close!"

Harry snickered.

"What's so funny?" I demanded playfully

"Nothing."

The rest of the train ride was uneventful. I was just listening to Stressed Out by 21 pilots. I sighed. I wish my life was like this. Suddenly the castle came into view. Annabeth would love it. Annabeth. Oh gods I missed her. I didn't even tell her where I was. She must be worrying like crazy. I decided to IM her when I get the time. Meanwhile, I snapped a shot of Hogwarts on my phone Leo made for each of the 7. It didn't attract monsters, thank god. The train shuddered to a stop. As I made for the exit, my demigod senses went crazy. In the distance, I saw someone staring at me. It was Malfoy. He motioned to his cronies and they proceeded to the castle. Before he could get to the doors, Dumbledore motioned to him to come to him. He asked,"Is it okay to reveal to others that you're a demigod at the feast?"

"Why?"

People have seen your fight with Malfoy,"I hung my head at this,"and they swore they saw their drinks respond to you. When you judo-flipped him, they saw a mini image of some girl judo-flipping what looked like you on the surface of the water. It seemed when you flipped Mr. Malfoy, it triggered a memory, and we need to clear up the confusion.

I smiled at the memory.

"Wait, do I have to do to full titles?"

"Yes."

I sighed in exasperation.

"Fine"

"You will have to wait until the sorting is over until you can enter.

"And now, please welcome our guest from a different world, to help us in the war with Voldemort."

I took this as my cue to enter. To say the least, the great hall was MASSIVE. I walked up the steps and Dumbledore introduced me.

"This is Percy Jackson…"

"Demigod son of Poseidon, returner of the master bolt, defeater of Ares , bringer of the Golden Fleece, defeater of Atlas, survivor of the labyrinth, defeater of Kronos, defeater of Polyphemus, helped defeat Gaea, grandson of Voldemort, two time hero of Olympus, and…"I paused, deciding whether to tell them or not. Before I could, Malfoy called out,"Scared, Jackson?"

"…survivor of Tartarus."I whispered.

It had the immediate attention of everyone. Those who knew what it was looked at me sympathetically.

"This is not possible",screeched a lady that even Aphrodite would be intimidated by her makeup

Suddenly I heard a voice behind me.

This is tots unfair

I'm totally real you know

You know who I am

I smiled to myself. Only one person can make haikus that bad.

"Hello Apollo, or rather cousin"

"Don't you mean dad?"

"You borrowed that from Apollo? You must be out of your mind!"I said, turning around, face to face with Poseidon.

"This is dad. Poseidon."

"Anyway, good luck with your year."

And with that, he was gone.

"You can't expect us to believe that!", the woman spoke again"I'm Umbridge, by the way. And you ranting off like that. You can't control us just because you saved olympia-"

"Olympus",I replied coldly.

"Whatever. And your only 17. It's not like you can be head of the army."

"Age doesn't affect authority."

"Anyway Percy has defeated every single monster, such as-"

"No!"

"The Minotaur, hellhounds, and empousai"

Suddenly, there was a knock on the door. I knew what I was expecting. I gave Dumbledore an "I'll kill you later" glare. I opened the door, and came face to face with the Minotaur.

"Missed me, did ya?"

It charged, but before it could get even close, I uncapped riptide and slashed at its belly while sliding underneath it. Before I could comprehend what happened. I found myself slashing at anything in sight. There were more than I could count. There was the Minotaur, Kelli and her cronies, some harpies, hellhounds, and turns out, Hyperion decided to have a "friendly" duel to the death. Apparently to avenge Kronos. What a day.