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

Story: Divided Soul

AN: This story is my take on the Son of Neptune and following books. This series will cover Percy's loss of memory, how this will impact his personality, some discussion of his training with Mars, his appearance at the Roman camp, his adventures as a Roman and his eventual reunion with his Greek friends. The main premise of this story is that Mars and Hera were both missing from Olympus, but only Hera was held captive. Mars was following his mother's orders by training Percy, now known as Scipio Marcellus (meaning: Staff of the Sea). Scipio has no memory of his past, except for his fighting abilities. Mars and Hera had to make up a new past for him, including a back story that will be discussed in later chapters. The main premise of the story as the title implies is the impact that the loss of Percy's link to the mortal world (his memories and especially Annabeth – Divided Soul) has on him; expect him to be a lot different from the boy in the PJO series. I won't go into more detail, except that he will be Roman and very OOC. The Roman camp is named Castra Semideus (translation Camp Demigod).

Chapter 1: Staff of the Sea

Somewhere in Hawaii – five weeks after the events of the Lost Hero

Third Person POV

A tall man stood on the edge of a black sandy beach where large ocean waves were beating the shore mercilessly, like the ocean itself was angry. The man looked to be in his early to mid thirties. He had coal black hair and wore dark sunglasses. He stood watching a young man clad in golden armor fight with a group of zombielike soldiers. The young man's head was covered with a gold Roman helmet with a red plume. He wielded a golden gladius expertly against the undead soldiers, his moves fluid and tireless. He fought as if the battle was a dance.

The older man smiled slightly at the sight before him. He looked almost like a proud father who was finally seeing his son ride a bike without the training wheels for the first time. The fighting stopped as the young warrior pulled his sword out of the chest of the last undead soldier before the creature melted into the black sand.

"Very good Scipio," the older man said. "You have improved much over the past few weeks." Scipio walked back up to the older man, and then he kneeled on one knee and bowed his head.

"Thank you Lord Mars," Scipio said firmly. The older man's smile grew at the adoration of the young warrior.

"Now let us continue your lessons, somewhere less hazardous," Mars said, as he looked at the large waves that continued to beat the shoreline. Scipio followed Mars into a small beach house that was tucked far away from the ocean waves. The modern looking house was made of concrete, steel and glass. It seemed out of place near the rugged shoreline. The two entered the house and walked to the kitchen. Mars took a water bottle out of the refrigerator and handed it to the young man.

"Thank you sir," Scipio said before downing the entire contents of the bottle in one gulp. The two men sat at the bar top kitchen counter, as Mars snapped his fingers and a book appeared on the counter top. Mars frowned at the book, but then he opened it roughly, as he scanned its contents. The two began to converse in Latin before they continued to discuss Roman history, culture and battle strategy. After three hours of study, Mars ordered the young man to his room to rest. The boy looked tired from his long day. He obediently nodded, before walking to his room.

Mars sat at the table, until a bright golden light appeared in the kitchen. The light faded into a dark haired woman with deep brown eyes. She wore a white Greek chiton and a gold crown on her head. Mars stood immediately before he smiled at the goddess before him.

"Mother, you are safe. I prayed you would be," Mars said. "But why are you in your Greek form?" Hera gave her son a small smile before it turned into a stern glare.

"I think this form suits me better considering the boy you house in the next room. How goes the training?" she asked.

"Per… I mean Scipio, has done well. I believe he is ready to go to camp." Hera's smile brightened.

"Does he remember anything about his past?"

"No, he remembers what we wanted him to. He remembered how to fight and now he even knows the ways of the Romans, but he remembers nothing of his past, including his real name."

"Very good. Does he know about the Achilles Curse and his weak point?"

"Yes, he does, plus he wears the special armor we made for him."

"I saw on the beach that he uses the gladius and the shield that Vulcan made for him," Hera said. Mars smirked at her knowingly.

"Yes, his old sword is well hidden." Hera nodded as she looked out the window of the kitchen toward the rough ocean waves.

"Good. You will need to bring him to camp tomorrow. I may be free, but our enemies are regrouping. They wish to destroy Castra Semideus." Mars followed her gaze out the window.

"What about Neptune? The seas have been getting rougher every day." Hera sighed, as she looked at the tiled floor solemnly.

"My brother loves that boy dearly. I guess for a demigod, he's not bad." Mars gave his mother a sly smile.

"Actually, as Scipio, he's a damn good kid. I can't say the same for the Seaweed Brain." Hera's eyes flashed with anger.

"Do not say that name. It may be derogatory to most, but that daughter of Athena gave him that name. He must never know of her existence and we cannot afford for him to remember his past." Mars bowed his head at his mother.

"Forgive me mother. I meant no harm." Hera smiled as she placed her hand on her son's shoulder.

"You're forgiven. Do your duty as a good son and we all might live through this crisis." Hera began to glow before disappearing into a golden light.

"So dramatic, just like father." Mars shook his head in amusement.

One day later – Castra Semideus

Third Person POV

Two demigods, both around fifteen years old, sat on an old log overlooking the ocean before them. Waves crashed along the shoreline as they watched dark clouds appear along the horizon.

"It looks like a storm's rolling in," the blonde haired, grey eyed girl said as she took her eyes away from the sea to look at the boy beside her. They looked almost identical.

"Reyna, I know you're still worried about Jason, but he can take care of himself," the boy said. Reyna gave her brother a stern look before responding.

"I'm not worried about him, Bobby. But he knows a lot about our defenses. What if someone was trying to use him to attack us?" Reyna said. Bobby looked at his sister skeptically.

"Jason would never betray us. Besides, we're twins, I know you too well Rey."

"I'm Praetor of the first legion now; I cannot afford to have emotional ties, especially to someone who abandoned us." Bobby stood up angrily as he glared at his sister.

"Jason did not abandon us. I can't believe you would say that. He's your best friend. What's happened to you?" Bobby asked. Reyna stood up and glared at her brother.

"Are you questioning my authority, legionnaire?" Bobby's face paled at the accusation. He stood straight as a tree and stared toward the horizon stiffly.

"No Praetor, I would never do that. Please excuse my rash behavior." Reyna sighed as she placed her hand on her brother's shoulder.

"You are forgiven this time Bobby, but don't let it happen again." Bobby exhaled at his sister's words.

Suddenly, a loud noise seemed to move down the beach, followed by yelling. Reyna and Bobby turned toward the sounds. Down the beach, barely visible to the two demigods, was a female demigod, her golden hair shining in the morning light. The girl was on the other side of the camp border, but that wasn't the shocking part.

Between the girl and the border stood a giant, at least four times the height of the girl and three times as wide. The creature had grey skin like stone and smoke came out of its nose. Bobby and Reyna unsheathed their imperial gold swords and ran down the beach toward the lone demigod. As they approached they realized that the giant had knocked the girl to the ground and was preparing to kill her.

"Hey ugly, leave her alone," Bobby yelled, as he and Reyna tried to get the attention of the giant. The monster turned and glared at them. Its eyes were red like a bonfire and seemed to flare with anger. Suddenly, a plume of flame poured from the giant's open mouth. Reyna and Bobby split apart as the flames scorched the sand where they once stood. The scorched sand turned to glass under the heat of the flames.

Reyna ran to the girl. "Gwen, what happened?" Reyna asked, as she pulled the demigod away from the giant. The blonde haired, blue eyed girl looked at her friend as she winced in pain.

"I was on border patrol around the camp boundary when this thing came out nowhere," Gwen said, as she cradled her broken left arm.

"We need to get you out of the way. You can't fight with a broken arm," Reyna said. Gwen shook her head.

"Reyna, I can still help," Gwen said, as she pulled out a small compact crossbow from behind her back. Reyna gave the girl an approving nod. Reyna helped Gwen to her feet and the two looked towards the battle. Bobby was dodging random plumes of flames.

"I could use some help, Reyna," Bobby yelled as he dove out of the way of a large boulder the giant threw him. Gwen shot her crossbow and the arrows struck the monster in the chest, but it barely penetrated the rocklike skin of the monster. The shot gave Reyna and Bobby enough time to charge the monster. Reyna swiped her sword at the ankle of the monster, but it only scratched the stone surface of the giant's ankle. Bobby tried to do the same with the creature's calf, but again its skin was too tough.

"How can we kill this thing?" Bobby asked. Reyna just stared at the creature. If the twins of Minerva couldn't figure it out, who could?

Suddenly, as if in answer to her brother's question, the ocean erupted from behind them. The twins turned to see a large wave about twenty feet high moving toward the beach. Bobby and Reyna ran toward Gwen to try and shield her from the massive wave. The monster shot a stream of fire at the wave, but the water snuffed out the flames easily. The giant was frozen in fear as the wave hit the creature head on. The monster was driven hard into the wet sand of the beach.

The three demigods stood up, but froze at the sight before them. A lone figure stepped out of the ocean. He was clad in imperial gold armor that covered his torso, legs and arms. He wore a gold Roman helmet with a red plume on top. The young man was six feet tall and seemed well built considering it was hard to see with his body hidden under the armor. Jet black hair stuck out from the sides of the armor and the demigod had sea green eyes that seemed to glow with power. The boy's tanned skin seemed to shine with an ethereal light, like he was lit from the inside. The three demigods just stood there in shock as the armored warrior walked toward the giant. The giant had finally stood up, but when it saw the warrior it stopped and stared at the boy in wonder.

The giant finally snapped out of its surprise by sending a plume of fire toward the demigod. The boy charged and ran straight through the flames. The fire seemed to move around the boy as it engulfed him. The armored warrior charged the surprised giant, and then he pulled out a golden gladius at the last moment.

The warrior swung the sword with such power and speed that it seemed like a blur. The blade hit the ankle of the giant, shattering the bone with the power of the blow. The giant stumbled forward and would have crushed the warrior if he hadn't jumped out of the way. The giant hit the ground with an earth shattering crash. The three demigods were knocked off their feet by the impact. However, the armored warrior seemed unfazed by the shaking ground. The demigod ran forward and slashed his sword across the giant's throat, cracking the creature's neck like a piece of chalk.

The giant turned to dust before the three demigod's eyes. They turned their gaze toward the armored warrior. The warrior gave them a slight nod before walking toward them. Suddenly, the dust that was once the giant began to move and the now four demigods stared at the circling dust as the monster began to reform before their eyes.

The armored demigod stretched out his hand toward the sea and a giant wave swept forward and seemed to encase the swirling mass of dust. The wave soaked up the dust, and then pulled the mass of dust and water back into the sea like a giant water spout. The column of water swirled and spat as it entered the sea. The water spout moved until it was about a football field distance away from shore, and then sunk beneath the churning surface of the ocean.

The three demigods again turned to look at the armored warrior that had saved their lives. Reyna stepped forward with her sword still in her hand.

"I am Reyna Cato, daughter of Minerva and Praetor of the first legion. Who are you?" Reyna asked. The warrior gave her a slight nod as he took off his gold helmet. His black hair blew in the breeze and obscured his eyes for a moment before he brushed the unruly locks aside.

"My name is Scipio Marcellus," he said. "Son of Neptune."

AN: I hope you enjoyed this first chapter. I hope this beginning chapter and the initial author's note helped answer some questions. I may be late in updating this and other stories as I'm off for vacation, but I will do my best to update. A big thank you to Starlit Reader my Beta for her great work and advice on this new series.