Disclaimer: I do not own Percy Jackson or the Heroes of Olympus Series

A/N: First off I would like to thank all of you who previously read my story Shades of Gray the one shot I wrote a few years ago based off a pairing I was extremely into at the time. So this will be my first attempt at a long fanfiction after lurking on this site and reading fanfics for so long. Prior to me reading The Son of Neptune I had a great imagination for the Heroes of Olympus series, and was inspired greatly by many fanfics of this nature. I decided I wanted to write my own version of it to the best of my ability. The main premise is Athena was working with Hera when swapping Percy and Jason, and it causes an entirely new series of events to occur. AU of course and I apologize in advance if I get some facts wrong and since its AU some of the characters are obviously gonna be OC.

Chapter 1: Blank Slate

Olympus Hera's Palace

3 Months Before the Events of the Lost Hero

December 13, 2009

Third Person POV

"Athena, everything is going according to plan correct?" asked Hera.

"Yes, Jason son of Jupiter, and Perseus son of Poseidon, will be swapped with Perseus being sent to Camp Jupiter and Jason being sent to Camp Half-Blood" answered Athena.

The two Greek goddesses were currently discussing how to unite the two camps, Camp Jupiter and Camp Half-Blood in order to combat the upcoming threat of Gaia. Both the goddesses decided that taking matters into their own hands would be better than trying to get the entire council to agree on there way of approaching things,

"Mother do you really think that Jason and Perseus will be able to bring the two camps together?" the Goddess of wisdom inquired.

Hera turned slightly and faced Athena giving her a serious expression. Both Goddesses were extremely beautiful wearing white Greek togas outlined with gold, Athena with long flowing black hair reaching her mid back, and Hera with lush, wavy black hair and donning a tiara on her head only emphasized her role as Queen of Olympus.

"Of course, Jason and Perseus both defeated titans of their respective caliber, Krios and Kronos, I believe that they can solve another impossible task such as uniting the Greeks and Romans" Hera said firmly.

"Why do you put so much faith in Jason and Perseus, did you forget Jason is an offspring from one of your husband's affairs with a mortal?" Athena asked inquisitively.

Hera glared at her step-daughter slightly before replying, "Of course I remember, for the goddess of wisdom, did you forget that I myself am the goddess of marriage which allows me to see every time a mortal cheats, which also includes my dear husband?"

"Yes, I am aware of that Hera, but I thought you weren't particularly fond of demigods especially Perseus"

"I have full faith in Jason to lead the Greeks he may have inherited his father's powers, but he doesn't have the arrogance his father has so I trust his judgment. As for Perseus, I have to admit that he is without a doubt a great hero, so leading the Romans should be easy for him, even if they are more volatile than the Greeks" Hera stated.

The goddess of wisdom sighed softly and sat down on a nearby couch growing weary of this conversation between herself and her stepmother.

"I don't think it's wise to leave the fate of the entire world to a roll of a dice that Percy and Jason will be able to get along with their respective camps, especially since their memories will be wiped" Athena said in deep thought.

"I'll be able to restore their memories in time, but for now those two need to focus on the challenges ahead, and not be distracted by the reminiscence of the past. Especially Perseus, his feelings for your daughter developed further after the defeat of Kronos, Athena" Hera said smiling.

"So? I still don't approve that seaweed brain's son romancing with Annabeth, nonetheless when Poseidon finds out about his son being swapped and losing his memories he will be angry without a doubt" Athena responded carefully.

"Father won't be as mad because Jason gets to reunite with Thalia, but Poseidon values Perseus greatly, even more so than when Theseus was alive and Theseus was his favorite son"

"I will deal with Poseidon when the time comes, as long as everything goes according to plan then we won't have any issues, thank you for the insight though daughter" Hera said thankfully as she walked toward her personal quarters to continue her work. Athena flashed herself out of Hera's palace and into her own, quickly throwing a drachma into a nearby fountain.

"O, Iris, Goddess of the Rainbow, accept my offering and show me Perseus Jackson." the mist quickly shifted into an image of cabin three at Camp Half-Blood, with Perseus asleep. Athena knew that with the current swap of Perseus and Jason, there still might not be a chance that the Greeks and Romans would be fully united, Percy was too unpredictable and so she decided that permanently wiping his memory would be the answer. His fatal flaw was personal loyalty after all, if Percy knew about this friends on the other side of the United States were in peril or danger, it would only cause unnecessary distractions for him.

Athena knew deep down that Annabeth would kill her if she ever found out she was the one who single-handedly destroyed her relationship with Percy, especially considering how much they had gone through together. She got to work on Percy's memories not once regretting it as she knew that this was all for the fate of the world.

"The fate of the world…" Athena said to herself quietly.

6 Months Later June 1st 2010

"I swear this shit always happens to me" Percy said as he ran around a few trees and stopped to catch his breath. It had been a week since he had been on the run. He was constantly attacked by monsters and he didn't have any weapons to defend himself. Strangely, when the monsters attacked him, they didn't leave a scratch. He never felt pain, but the continuous stream of monsters was agitating. As hard as he tried, he couldn't remember anything from before the week. The only thing he could remember was his name and a dream from a few nights ago.

Flashback

Percy awoke in his sleeping bag late at night, startled by a weird sinking feeling in his stomach. It was strange as he tried to remember where he was exactly but couldn't name it as if it was on the tip of his tongue, but it just falls off like a piece of dust on the corner of a table.

Suddenly there was a brief flash of light, and as Percy blinked out the dizziness in his eyes he opened them to see one of the last goddesses to ever visit him in his dreams. The goddess in front of him was wearing elegant style roman-like robes with an owl on her shoulder. She glanced at Percy as he regained his bearings watching as he quickly stood up and began to bow in front of her.

"Lady Athena it is an honor…"

"It's Minerva, Perseus, Athena is my Greek form, Minerva is my Roman form" Minerva said slowly.

"Minerva? You mean the Gods have other forms?" Percy asked his eyes widening slightly.

"Not forms, but aspects, ever since the center of the world changed from Greece to Rome, Rome wanted its own version of things, sculptures, monuments, cities, and even the gods themselves. Gods aren't just created Perseus, and with the heart of civilization moving from Greece to Rome back then, that is exactly what we did. It's what caused most Gods today to have two aspects a Greek and Roman one" Minerva explained.

"I'd assume Lady Minerva, the Gods are able to swap between aspects at will?"

There was a brief glow of light and Minerva disappeared replaced by Athena wearing Greek style robes, but with a spear sheathed on her back and the gray of her eyes much more prominent in this form.

"Yes, however keep in mind that we Gods are not the only ones with different aspects, so do the titans, like Kronos who goes by Saturn, or Crius whose Greek name is Krios.

Athena crossed her arms and continued, "There is a camp in California for roman demigods, Camp Jupiter, you'll meet others like you there, but first you have to go the wolf house and meet Lupa, she has to deem you worthy before you can go to the camp"

Percy nodded his head as he recalled himself being a demigod, but struggled to remember who his godly parent was.

"Lady Athena, my godly parent who is it?"

Athena knew she had to choose her words carefully here, as this was crucial for Percy to understand in order to be able to properly lead the Roman demigods. She knew she had to keep the Greek Camp and everything along with it low key, or all the work she had done will be for naught.

"Neptune, the God of Earthquakes, Storms, Hurricanes, Horses, and the Seas is your father Perseus, and before you ask yes there is a Greek version of the Roman camp, but as a Roman your goal will be to reach Camp Jupiter"

Athena proceeded to send Perseus an image of where the wolf house was and who Lupa was, an ancient wolf who was there since Rome was born, as she mothered Romulus and Remus.

"Remember Perseus, that the Roman demigod's Godly parents are the roman versions, calling them sons and daughters of their Greek aspects would not be the wisest thing to do" she warned.

Percy nodded "Why me though, is it because of the prophecy?"

"Yes the prophecy requires seven half-bloods and whether they be all Roman or all Greek is a mystery to even us, but we think you might be one of the seven so it is important that you reach the Roman camp"

Percy nodded once more.

"Good luck, Perseus"

And with that everything faded to black as Percy's dream ended.

*Flashback End*

"Well what do we have here? a beautiful male just ripe for the taking" a silky voice hissed from behind.

Percy glanced behind him and counted three empousa, all wearing ripped cheerleader's uniform with typical pale skin, a donkey leg, a fake leg, and glowing red eyes.

"Shit, if only I had a weapon this would be over quick" Percy muttered as he tensed his legs preparing to run.

"Now, now, honey don't you think it would be rude to turn your back on three beautiful women such as ourselves?" one of the empousa asked her voice laced with charm speak.

Percy began to slowly walk toward the empousa as they grinned happily at such a delicious meal. As he got within melee range of the first one he grabbed her and quickly shoved her towards the other two making them stumble backwards and began to run.

"Oh shit, I pray to the gods I can get out of this one" Percy swore as he ran around some trees to break line of sight and kept running straight, he knew the wolf house was around here somewhere and if he could get there maybe Lupa could help him. Percy stopped suddenly as a knife suddenly landed in front of his foot, a steel knife. He looked behind him and realized the empousa were gaining ground on him and throwing knives to try and slow him down.

10 minutes later he finally saw the Wolf House, and began to approach it as silently as he could. Percy lost the empousa a while back and didn't want to face any more monsters at least without a weapon.

"Alright I think this is the place, hopefully Lupa is here just as Athena said" Percy said to himself as he took a swig of water feeling a bit more energized. Being a son of Neptune had its perks than just attracting monsters within a 100 mile radius.

The wolf house was much different than Percy thought, it looked ruined as if an explosion happened with bricks and timber all over the place. He approached it with caution and stepped through one of the arches into the building which led to a large circular room with grass and an open ceiling. It was hardly a room because of the damage done to the building, and was more open than enclosed.

Suddenly wolves appeared from the entrances in front of him, with one looking far larger than the rest. All the wolves had startling snow white fur except for the biggest one who Percy judged as the Alpha. Unlike the others who had yellow eyes, the alpha had scarlet red fur with silver eyes not as cold as Athena's but more misty like, as if it had seen countless demigods prior to him.

Percy heard growling from behind him and realized there were also wolves coming from the entrance he just came through. The wolves advanced toward him from behind slowly as he was forced into the center where the wolves enclosed him with the alpha never taking it's eyes off him. In total Percy counted 8 wolves including the alpha 4 in front of him and 4 behind him in a circle. Suddenly the alpha in front of him emitted a bright light causing Percy to turn away and in response a woman appeared donning a silver hunter's outfit and was tall, standing five or so inches above Percy just judging from estimation.

"Who dares enter the sacred wolf house?" she asked angrily her hands tensing.

"It doesn't look so sacred looking like this" Percy muttered.

Lupa narrowed its eyes hearing every word Percy said and took a step closer toward Percy which caused the other wolves to slowly enclose the circle around Percy.

"In retrospect I shouldn't have said that" Percy thought, before the alpha repeated its question again.

"Perseus Jackson, Son of Neptune I was told to come here before I could go to Camp Jupiter by Lady Minerva"

"A Son of Neptune? And sent by Lady Minerva? Boy you better not be lying or your death will be swift" Lupa warned as she materialized a bow in her hand, not loaded yet with an arrow.

"There are few demigods who have the honor of being sent by the goddess Minerva and even fewer are males, and you are the first Son of Neptune I have ever encountered"

Percy grimaced as the wolves behind him began to growl. He really did not want to fight, hoping that Lupa wouldn't be so irrational to order him to be killed so easily. As if his prayer was heard a holographic symbol of an owl suddenly appeared above Percy's head, which caused Lupa to widen her eyes and told the wolves to back off as they retreated back out of the wolf house.

Lupa approached Perseus and slowly walked around him analyzing his stature.

"It seems Lady Minerva truly did send you, but understand that I hardly take every demigod that walks into the wolf house" Lupa spoke.

"Rome only takes the strong, the weak-minded and weak-willed wouldn't last a day in our camp, much less monsters in the real world"

Percy nodded slowly and allowed Lupa to continue.

"I can tell that you've made it far to get here, so I think you should be able to take care of yourself on your own, but for now I need to know if you can fight" Lupa stated.

"Do you have a weapon?"

"No, I don't" Percy responded.

The air in front of Lupa suddenly shimmered and in her hand she held a gold sword about 32 inches in length and held it out pommel first to Percy.

He gripped it tightly and took a few swings around him, surprised at how balanced it was. It had no cross guard but it was light, meaning that it could be used in tandem with his excellent reaction time and fighting style.

"You'll be fighting me by the way" Lupa said as she grinned at his shocked expression.

"Shit, do you fight every demigod to see if they are worthy?" Percy swore as he backed up a few feet and began to circle Lupa.

"No, but Minerva has vouched for your words, and although she is a goddess, Minerva isn't a war goddess in Rome" she spoke as she materialized a silver sword and began to circle Percy in the opposite direction.

"Consider this your initiation"

Percy's legs tensed as he suddenly shot forward deciding to take the first move, arching his sword forward in a diagonal slash aiming at Lupa's left shoulder who quickly sidestepped to the right and thrusted at Percy's midsection which he batted away before backing up and regaining space again. This time Lupa took the advantage and began raining down strikes on Percy's left and right forcing him to parry each strike without time to counter. The constant strikes on the opposite side of his body forced Percy to turn his hips every time, which lowered his chances of an offensive strike.

Finally, Percy managed to catch her blade close to the hilt of his, and Lupa's eyes widened as her blade clipped Percy's fingers but watched as they bounced off as if his finger's were made of steel. Percy took advantage and smacked his pommel on Lupa's face causing her to growl in pain and pivoted attempting a slash at her head. Lupa quickly recovered by using her dexterity to bend back causing Percy's blade to go over her, and swept Percy's legs out from under him.

Percy was surprised and almost lost his grip on his sword as he fell to the ground. Lupa quickly stepped on Percy's right foot preventing him from standing up and gripping her sword with both hands attempted a downward slash aimed at bisecting Percy as he raised his sword preventing it from cutting him. His arms quivered as Lupa had the advantage being able to use gravity to emphasize her strike with her strength.

"Yield, pup there is no way you can win now" Lupa growled pissed off at getting a pommel to the face.

Percy grunted as he tried to keep Lupa's sword at bay, but suddenly thought of something as he lowered his sword suddenly which caused Lupa's blade to come dangerously close to his body. Using the water bottle in his pocket he forced the water to come out and splashed Lupa in the eyes causing her to take a half-step back which was enough for Percy to bat away her sword and to quickly stand up resetting the battle.

Lupa wiped away the water in her eyes and glared at Perseus before nodding her head and snapped her fingers causing her sword to vanish.

"You fight very strangely, Son of Neptune, but you know how to fight without getting killed" Lupa said smiling showing her sharp teeth.

Percy smiled, and lowered his guard as he responded.

"Thank you Lady Lupa"

"Still it seemed you were hiding some things from me, as to why your fingers did not come off when you tried to catch my blade on your pommel?" Lupa inquired.

Percy stopped to think for a second before shaking his head. "I honestly do not know that's the first time something like that has happened and even I was surprised that I don't have fewer fingers"

Lupa herself tried to come up with her own answer and decided to put it off till later realizing it was getting dark.

"Keep the sword, you're going to need your own weapon when going to that camp, and I rather you have something you're comfortable with than a random sword one of the legionnaire's will give you"

Percy nodded as Lupa handed him a sheath and Percy quickly put it on his back.

"Since you have proven adept in traveling I'll teleport you a few miles from where Camp Jupiter is located" Lupa spoke.

She sent Percy an image of a bridge and close to it a tunnel signaling that was the entrance to the Camp.

"Now go and do us Romans proud, Perseus, Son of Neptune" Lupa said as she held out her hand preparing to teleport Percy.

"Wait Lady Lupa, this sword what is it called?" Percy asked as he spun it with his right hand.

Lupa blinked once before responding.

"It's a Gladius," she said before teleporting Percy away.

A/N: I hope you guys liked the first chapter, some questions I see being asked are Percy's memories. Since they were tampered by Athena, for the most part he remembers how to fight the gods/goddesses etc. Athena just felt the need his friends and any other information that could distract Percy in his task to lead the Romans and eventually lead both the Romans and Greeks vs Gaia were useless and were wiped. Finals are coming up so the next update might be really slow, but summer is coming and I'll update more frequently.