Harry Potter, son of the big three: The invisible boy beneath the mask

Prolongue

Disclaimer: I don't own Harry Potter or Percy Jackson.

Prologue

Zeus walked the halls of Olympus thinking of his brothers and the agreement they made. They had been fighting so much it got to the point where their mother had interfered. He still couldn't believe they had all agreed to her idea. He didn't mind however. He loved his new son and since he was immortal he could spend all the time he wanted doting on him. Walking into nursery he looked around the room at the pasty white walls and the crib made of clouds. Taking strides towards it, he spotted the child that held his thoughts. Zeus gently ran a finger down his little boy's cheek and smiled. The baby was the picture of innocence with his messy tuffs of black hair and the scrunched up expression he made when he was sleeping. Chuckling softly, he cautiously picked the child up and cradled him in his arms but froze and turned around as he felt another presence in the room. 

Turning around he found Athena looking at him and his son with curiosity. Feeling the power rolling of the child in waves she looked concerned.

"Are you sure it is wise having a kid like him?" she questioned intrigued. She had heard about the new prince of Olympus and his power and decided she had to check for herself.

"Don't question me and my brothers judgement." Zeus growled. There were many things he trusted Athena with but his new born son wasn't one of them. At times she could be quite reckless and could hold grudges as long as Hades if she wanted. If she believed something was a threat she would choose to eliminate it beforehand. He wasn't about to let her do that to his new son especially since he knew just how much power the baby held. He wasn't that surprised, it was expected considering who his fathers were. 

Athena nodded softly and moved closer to the crib getting a better look at the baby in the king of Olympus's hands who had started to stir.

"I do not recollect Amphitrite, Persephone or Hera being pregnant let alone birthing a son. How was this child made father?" she inquired softly. 

"No. None of our wives were pregnant. The child was forged with me and my brothers blood. We mixed blood with the intent on creating a child." Zeus replied still gazing at his child.

Athena frowned in confusion. Why didn't they just get one of their wives pregnant? They wouldn't have to share their son. Shaking her head, her eyes softened as the baby opened his eyes revealing entrancing emerald orbs that seemed to be the colour of vivid emerald. Before she could say anything Zeus sighed.

"I wish I could do this with my demigod children... I know some of them are just flings and mean nothing but I really do love them." he spoke in a wistful voice.

Athena let out a harsh laugh and bit out "Don't we all! But we know why the old laws were placed. Its so when the child dies we don't get to attached and so the godly parent doesn't rule with emotion and mayhem."

"I know why the laws were placed Athena." Zeus snapped. "Or are you forgetting I was there when they were created."

Athena focused her attention back on the baby in Zeus's arms as he cooed at her a soft smile played on her lips and asked in a quite voice.

"What is his name?"

"Hadrian.. We call him Harry." came the answer.

                                                                        -------time skip---------

Harry was now turning 2 and on Olympus it was a day of celebrations. For once the big three weren't fighting, well not too badly, and focused all their attention on the party. In the middle of the throne room was a small throne for the birthday boy and was placed in between presents that lay scattered on the floor while confetti and streamers fell from the ceiling. Poseidon, Zeus and Hades were all preparing for Harry's birthday but it wasn't completely peaceful.

"I can't believe you fell of the wagon. OH WAIT! Yes I can." Hades shouted.

Poseidon glared and yelled back "Oh shut up! Zeus was the one who fell off first so the agreements broken!" 

Zeus looked between them and knew they were getting nowhere. "Both of you be quite! Harry is trying to sleep in the other room. Hades we can figure everything out later and figure out how Poseidon managed to keep it a secret for so long." he screamed.

Hera walked in with all the Gods behind and looked at the mess and shook her head confused on why they were fighting again. When they asked why the only reply they got was "So we can get all the anger out of the way."

"Where is the birthday boy anyway?" Amphitrite questioned. After Harry was born all the big three wives got on better terms with their husbands and fell in love with Harry. I mean who couldn't. From his messy black hair and emerald eyes he was adorable. They from then on named themselves Harry's mother figures and intended on helping raise him.

Hades got up and walked to the nursery with an eager Poseidon following as they left Zeus to hastily clean up the mess they made. They entered the nursery devastated only to find the crib empty and Harry missing. 

Hades burst back into throne room slamming the door open with a bang his eyes blazing with anger and a devastated and equally angry Poseidon following.

"Harrys gone....SOMEONE KIDNAPPED HARRY!" Hades growled out 

In an instant the happy occasion turned to chaos as Zeus and all the Gods shook with anger and started searching the entire of Olympus for him but it was too late Harry was no where to be found.

                                                           ------When Harry was kidnapped----

Harry was sleeping peacefully when he was woken by a sudden move. A goddess that he didn't recognise picked him up and carried him off Olympus handing him to a man with a long grey beard and cold blue eyes.

 Before the Gods could even notice Harry was gone he was taken to England where no one would find him.

 Nemesis the goddess smiled cruelly as Dumbledore disappeared.

"Sorry Zeus but the world needs balance.  I want revenge. You have to pay for what you did to my children." she whispered.

 Dumbledore soon decided what to do with him and handed him to the Potters claiming he was an orphan whose parents died in the war and watched with glee as Hadrian the son of the big three was blood adopted, his godly scent masked and turned into Harry Potter. His saviour. The malleable golden boy that he had been looking for to be his pawn on the chess board. On Halloween night he watched his plans fall into action as he dropped Harry off to the Dursleys after he led Lily and James to their demise. Everything was going as planned.

In Olympus however all the gods mourned their loss and never lost hope that their missing family member would turn up soon.  They turned every single stone on Earth and Olympus to find him and always silently berated themselves for perking up when they heard the name Harry or even Hadrian. They all kept their eyes out desperately wanting him to come back and ordered every spirit and deity to keep an eye out. They all fell apart and all the relationships they forged slowly cracked. Hades stayed in the Underworld while Poseidon spent his time in the sea as Zeus stayed above. They only ever came together on the winter solstice and even then they argued day and night. 

Hestia watched sorrowfully as the gods ripped themselves apart in guilt, anger and sadness. She silently sat by the hearth and mourned the sweet green eyed boy who would sit and play with her keeping her company. Harry was the one thing that had brought peace to them all. Olympus was never the same.