Starring Heroes Of Olympus:

-Percy Jackson (son of Poseidon, God of Sea) - Greek

-Olivia Bailey (daughter of Neptune, God of Sea) - Roman

Thalia Grace (daughter of Zeus, God of Sky) - Greek

Jason Grace (son of Jupiter, God of Sky) - Roman

Nico di Angelo (son of Hades, God of the Underworld) - Greek

Hazel Levesque (daughter of Pluto, God of the Underworld) - Roman

Annabeth Chase (daughter of Athena, Goddess of War & Wisdom) - Greek

Reyna Ramirez-Arellano (daughter of Bellona, Goddess of War) - Roman

Piper McLean (daughter of Aphrodite, Goddess of Love) - Greek

Leo Valdez (son of Hephaestus, God of Fire and Blacksmith) - Greek

Starring Wizards and Witches : (Main)

Harry Potter

Ginny Weasley

Hermione Granger

Ron Weasley

Prologue:

After the Titan and Giant War, and after the war against the Dark Lord, Gods Of Olympus and Hectate, Goddess of Magic Decided that, Demigods and Wizards should become allies. This is because Night ( who lived before Gaia) herself is about to return. She will be accompanied by Titans, Giants , Voldemort (as well as his Death Eaters), and the Mother Earth, Gaea herself. The world now faces THEIR DARKEST HOURS.

Disclaimer : I DO NOT own any of the Percy Jackson and Harry Potter Characters, RICK RIORDAN & J.K ROWLING does. However I Do own the character, 'Olivia Bailey'.

CHAPTER 1 : I MEET MY OLD FRIENDS

PERCY

I was sitting in the beach with Annabeth, my girlfriend, when Nico came out of nowhere, out of breath.

"Hhiii Percyyy" he caught his breath.

"What's up?" I asked him.

"Chiron wants to see us." he replied.

"Why?" I started to ask him, before being cut off by Annabeth.

"It is obviously important or why would he want to see us? Come on, seaweed brain." She said, walking towards Nico.

After a 2 minute walk, we reached the Big House. There I met my friends, some from the Roman camp. However there was a girl I never saw before. She had blondish brown hair, and sea green eyes same as me. I wondered could she be my sister, but I knew it was not possible because the Big Three barely had any children because of the pact they made, so technically, I was an accident. But then I realised someone was talking to me. I sometimes hated having ADHD.

"Percy...Percy,"Annabeth was shaking me. "Chiron is speaking, listen."

"...the Gods never wanted to do this, but they have to sent you to that school because the most dangerous war is yet to come." Chiron was saying.

"Which school is he talkking about?'' I asked Nico.

"Hogwarts School of Witchcraft and Wizardry." He answered

"..the Gods have picked you ten, to learn their way of life. Thalia Grace, Jason Grace, Nico di Angelo, Hazel Levesque, Piper McLean, Leo Valdez, Reyna, Annabeth Chase, Percy Jackson, and finally, Olivia Bailey" Chiron finished off, looking at the new girl.

After they left, I asked Chiron who that girl was. He said, "ooh, She is your half sister."

"She's a daughter of Poseidon?'' I asked in awe.

"No, but she is a daughter of Neptune" He replied.

"So...this wizard school, when do we go there? I said, still thinking about having a sister.

"Percy, I told you already, tomorrow, at noon."

"Okay, bye Chiron" I said going back out side.

The Next Day...

HARRY

I just reached Kings cross station. I was thinking about the advantages and disadvantages about repeating the 7th year, while I was waiting for the Weasleys, and Hermione to arrive.

Advantages:

spend more time with Ginny, my girlfriend.

I will be in the same class as Ginny.

I will also be with Ron and Hermione.

This would be the first year that we would have without worrying about Voldemort.

Disadvantages:

The School reminds me too much of the war, and the people who sacrificed to protect me.

Mad-Eye...Remus...Tonks...Sirius...and a lot of others..

(by the way, Fred is still alive)

After a few minutes I spotted, Ginny, Ron, Hermione, Fred, George and Mrs. Weasley. Ginny came running when she saw me, and we kissed, which her mother pretended to not see. I hugged Ron and Hermione, but Mrs. Weasley was losing her patience.

"C,mon guyz, get a move on", she said in a rush. "The train will leave any minute now."

Harry was very used to platform nine and three-quarters by now (obviously). It was a simple matter of walking though the barrier dividing platform nine and ten, which was apparently solid for the Muggles. However, the most tricky part was doing it in a way, without attracting Muggle attention. We did it in groups today; Ginny and I went first; We leant casually against the barrier, and slid sideways through it...and as we did so, platform nine and three quarters materialised in front of them.

The train journey was calm except when the chocolate toad started messing around. As the train door opened,there was a rumble of thunder overhead.

"Hi, Hagrid!" I yelled, seeing a gigantic silhouette at the end of the platform, which can only be Him.

"Alrigh', Harry?" Hagrid waved. "See yeh at the feast"

Hagrid then took the first years toward the lake. First-years traditionally reached Hogwarts by sailing across the lake with Hagrid.

Ron, Hermione, Ginny, and I got into one of the carriages, carried by thestrals. The thestrals can now be seen by quite a lot of people, since the war against the Dark Lord. We went through the gates, flanked with statues of winged boars, and through the windows I could now see, Hogwarts getting nearer and nearer.

After what seemed like ten minute we reached the Great Hall, where Professor McGonagall was waiting.