A/N: I own neither Percy Jackson nor the Avengers.

Today is the one year anniversary of my joining fanfiction. To celebrate that I have decided to post this story I have had in my head for a while now.

I plan to have it stretch out at least into Age of Ultron and maybe join some solo films. I have a rough idea of what I want to do but your suggestions are always appreciated. My plan is to mix the comics into this too so it won't be exactly like the movies. Enjoy!

Marvel's Percy Jackson

Volume One – Avengers

Chapter One – Changes

The Fridge, SHIELD's most secure facility and prison. The place where they kept the most dangerous people and acquired objects in the entire world. It had one hundred floors – not counting the basement, which almost no one was actually supposed to know about – and only one entrance and exit, located on the roof.

Strangely enough, it was not the weirdest place Percy Jackson had ever been in his life.

Percy Jackson. The first demigod son of Poseidon in decades, savior of Olympus, et cetera, et cetera. He hadn't really been in touch with the godly world for a few years. Hardly at all since his very nasty and public break up with Annabeth.

She had found a boy-toy to play with and thus didn't need Percy anymore. That bastard son of Aphrodite had ruined everything.

Although, Percy had gotten a pretty sweet revenge. Besides beating the idiot up, that is. Aphrodite had, of course, known about the break up the second it happened and had wanted to apologize to Percy about her son.

Let it never be said that the love goddess doesn't know how to apologize.

After a godly and very hands-on-pants-off sex-ed, Percy had gotten Hecate to repay him the favor she owed him after pardoning her after the second Titan war by removing his damn demigod smell.

Then he decided to just leave and go to the mortal world for a while. What a splendid idea that turned out to be.

His mother, Sally Jackson, the most amazing person in the entire world, had gotten the same kind of cancer that took her uncle's life. She and Paul Blofis, her husband, weren't very well off so the treatment was too expensive for them.

Percy was trouble wherever he went so there was little help in him. He just barely graduated high-school and couldn't hold a job if his life depended on it.

But he did have a very particular set of skills.

Against his better judgement, Percy started doing some things for money. It was nothing much and nothing illegal, not very illegal, anyway, just some jobs for some private agencies.

People in some particular businesses started taking notice of him and wanted him to do some jobs for them. He didn't really want to but he was very good at it and it paid the bills for his mother, so he continued.

He created a special suit he always wore to his missions, partly because it was very good for his missions and partly because it looked cool.

It couldn't be just cloth, though, so he called upon a very hyperactive son of Hephaestus and had him and his sorceress of a girlfriend make it for him.

The suit was all-black. It consisted of cargo pants and combat boots in a similar fashion to those worn by soldiers, gloves and a form-fitting tunic with a high collar. All of that was shock-resistant, bullet-proof and fire-proof. Go team Leo.

Before long he was very well known and his services became increasingly sought-after and some were very illegal.

The illegal ones were, however, the ones that paid the most so he decided to abandon his morals just once or twice.

But when he crossed that line, he couldn't turn back.

He started carrying two high-power handguns in holsters on his torso and a combat knife in a sheath on his thigh. The final step was when he had Riptide altered into a celestial bronze/tempered steel mix like Kronos's scythe.

Percy couldn't be just Percy Jackson so he created an alter ego of sorts. For years he had been the mercenary known only as Perseus. The destroyer.

That's how he found himself in the Fridge. He hadn't been caught or anything, no, he was much too good for that. He was on a mission for a very wealthy client and was expecting the payout to be bigger than anything he had been paid for a single mission previously. But that was because of what kind of mission it was.

It was a high-profile assassination.

It seemed that this client of his knew of an inmate there that had caused them some grief in the past and needed to be taken out. It was not going to be easy, that much had been obvious from the start.

The target was a woman named Eliza Hunt and apparently she had oneirokinesis, the power to manipulate dreams. She was probably as much of a pain in the ass as that idiot kid of Morpheus that had come to camp six years before and was always messing with people, could even be his sister.

The guards must have had her power subdued somehow though, so it shouldn't be too hard, although Perseus was not going to underestimate her.

To get into the prison, Percy had to do a lot of mist manipulation. Y'know, after he kidnapped a guard so he could pretend to be him.

What people saw when he walked past them was a medium height, somewhat pudgy-looking man with red hair and blue eyes and a face that looked like it hadn't lost all its baby fat.

He was kind of like a shorter, American Frank with red hair before all his child-of-Mars body changes.

Perseus walked down a hall in the Fridge that led to his target's cell. It was finally time after nearly a month of planning. But then, of course, everything changed.

"Agent Hendricks, report to holding cell 94," came a female voice from Percy's earpiece as he walked. "Agent Hendricks, I repeat, report to holding cell 94." Percy started when he suddenly realized that he was supposed to be agent Hendricks and put a hand on his comm.

"Copy that. On my way now," he said to the agent on the other side. "Damn it. Why now?" Percy cursed under his breath as he made his way to the holding cell that was on a whole other damn floor.

Five minutes later he entered holding cell 94 and immediately stood at attention. "Director Fury," he said to the dark-skinned, one-eyed man standing in the middle of the room.

"Agent Hendricks," Fury started. "Was found this morning in an abandoned warehouse just outside of Ohio. He was so out of it that he barely knew his own name, but there were no drugs in his system." Percy's eyes widened and he inwardly cursed himself for his sloppy work, they should never have been able to find that damn agent.

"So you can probably imagine our surprise when we saw that he had checked himself into work at the Fridge today," Fury's gaze was boring into Percy at this point. "I'll only ask this once. Who are you?"

Percy looked at Fury for a few seconds to gauge if he had any chance at lying his way out of that one, but he found no possible way and relaxed his posture. "Not agent Hendricks, it appears," he said coolly." Fury's glare sharpened.

"That's not the question," he said.

"But it's what I'm answering," Percy fired back. "Now tell me why you're here. If you were going to kill or imprison me, I doubt you'd actually bother to show up yourself. Not for just another agent, anyway." Fury glared for a few more seconds before speaking.

"No one has ever infiltrated the Fridge before," Fury stated. "And I've never seen such an accurate disguise before either. You seem to be a man of many talents." Percy raised his eyebrow.

"So they say," he said.

"They?" Fury inquired.

"It's just an expression," Percy said, trying to cover up his slip. It seemed that this mission just couldn't get worse. Fury hummed after staring at Percy for a few moments.

"I want to make you an offer," Fury said, catching Percy completely off guard.

"What?" He asked stupidly.

"You heard me."

"What kind of an offer?" Percy questioned, wary of the man before him.

"Come work for me," Fury said. "What kind of work you get, depends on you."

"You've got to be kidding me," Percy stated.

"I assure you, the offer is not a joke," Fury told him.

"You don't know who I am," Percy remarked.

"Well, I can safely say that you are not agent Hendricks," Fury said. Percy snorted.

"I'll think about it," he finally told the director.

"That's not how this works," Fury said forcefully. "You either accept and come work for me or you stay in this cell for the rest of your life." Percy frowned and stepped closer to Fury, whose hand went instinctively to his gun at his hip.

Percy snapped his fingers. The sound was sharp and clear. "I am going to think about your offer. You were just about to walk out of here and let me go my own way until I contact you," he said to the director of SHIELD.

Fury's eyes unfocused for a second before they focused again and he nodded. "Of course. We will talk later," Then he walked past Percy and left the room. Percy shook his head.

"Mortals are too easy," he muttered with a small smile on the borrowed face as he moved to his target's cell once again.

Percy went through all the necessary precautions to enter the inmate's cell. Finger print scanners, retinal scanners, DNA sample scanners, just about every scanner ever created. Since Percy technically was agent Hendricks it was no problem getting through SHIELD's security.

When it was all done he walked into the cell. It was a grey and boring room with only a bed, toilet, sink and a couple of books in the corner.

In the aforementioned bed sat a rather attractive woman staring at Percy. She had black, short hair and blue eyes. The woman looked to be around thirty two and seemed taller than average. On her neck was a metal collar with a red light, an inhibitor collar.

"Why are you here, agent Hendricks?" she asked with a British accent. "It's hardly time for dinner already?"

Percy didn't say anything but snapped his fingers and let his mist disguise disappear. Eliza Hunt's eyes widened and she stood up from the bed in a battle stance as she stared into the cold, sea green eyes of Perseus.

"Who are you?" she demanded with narrowed eyes.

"Perseus," he told her and her eyes widened again at the sound of his name. Her arms dropped from their ready position.

"You here to get me out?" she questioned, a little hope seeping into her sapphire eyes. Percy hated to do this to her but he couldn't fail. Not now.

"No," he told her. Her whole body seemed to deflate at his denial.

"So that's it then?" she asked morosely. "You're going to kill me now?" A part of Percy ached as he heard those words. His name, the name that had belonged to of one of the great heroes of ancient Greece before him, was now associated only with murder and assassination.

He steeled himself and looked her right in the eye, although she couldn't see it. "Yes," he said. His target sighed.

"Well, just make it quick, yeah?" she pleaded. Perseus nodded and pulled out a pistol. Without hesitation, he pulled the trigger and put a bullet right between Eliza Hunt's eyes.

She stood for a second, with eyes full of pain but also acceptance. She had truly made peace with the fact that she was going to die. Then her limp body fell to the ground with a thump.

Perseus closed his eyes and took a deep breath. He hated assassinations. He wasn't as squeamish about killing as he had been in the wars, ironic as that was, and if someone tried to kill him or stood in the way of his completing a mission he would easily take them out.

But assassinations were different. Well, some assassinations. Like that one. People died for nothing. It was simply killing for the sake of killing.

Then why did he do it? He could lie to himself and say that it was for his mother's hospital bills but he knew that he didn't need to take all jobs that came his way for that.

Maybe he secretly enjoyed it. That feeling of control, of power. To know that he held in his hand the difference between a person's life and death.

No that wasn't it, the mere thought of it sickened him, he had never craved power. Then what was it?

He didn't know.

But Percy was going to change it, starting with Nick Fury and his offer to join SHIELD. He was not going to actually join SHIELD, though, not a chance. He'd just be a freelance for them or something. They were the good guys and Percy wasn't anymore. But didn't mean he didn't want to be.

He snapped his fingers and manipulated the mist to make it look like the only person that had been in there that day besides Eliza Hunt was agent Hendricks.

Then he just walked out with determination in his eyes. He was going to stop killing people for money, people that didn't deserve it, anyway. After he got paid for that last one, of course.

X

Two days after his infiltration of the Fridge, Perseus was sitting in director Nick Fury's comfortable office chair. He had snuck in completely undetected. The agents were so sure that no one would dare infiltrate their main headquarters in the Triskelion that they hardly even bothered to use their training to see if there was someone breaking in.

Arrogant, stupid. It'll be their downfall. He thought. Nobody is infallible, that much he knew.

When Perseus reached Nick Fury's office, he decided to forgo any stealth tactics and just walked in. The office was pretty large with huge floor-to-ceiling windows.

Perseus walked into the office and sat in Fury's desk chair – which was, by the way, super comfortable – and twirled around like the idiotic ADHD kid he was until he got dizzy. Then he sat by himself, facing the windows and tapping his fingers on the armrests impatiently as he waited for the director of SHIELD to arrive.

After waiting for what seemed like hours – though it were only a few agonizing minutes – he heard someone enter and opened his eyes. No he hadn't been falling asleep. Not at all. He was only . . . resting his eyes. Yeah, that's it.

Director Fury had frozen completely as soon as he saw Perseus before he swiftly pulled out his gun.

"What do you want?" Fury asked.

Percy tried to imagine what Fury was thinking right then. A known mercenary sitting in his office chair with his feet on his desk and his hands behind his head. Probably a strange sight.

"Answer me," Fury demanded. "What. Do. You. Want?" Percy stayed silent and stared at Fury for a few seconds before he set his feet back on the ground and stood up, making Fury tense even more.

"Don't worry director, I'm not here to harm you. So put your gun down," Percy told him.

"That's not going to happen," Fury said. "And I asked what you wanted, not what you weren't going to do."

"Do you remember speaking with me a couple of days ago?" Percy asked the director whose eyebrows furrowed in thought.

"You and I have never talked before," Fury stated. Percy smirked.

"Sure we have, you just didn't know who you were speaking to," Fury's eyes widened as he realized what the mercenary was talking about.

"Agent Hendricks?" he asked, obviously shocked, though he made a valiant effort to hide it.

"Agent Hendricks," Percy confirmed. Fury stayed silent for a bit, seemingly deep in thought.

"What's your answer?" Fury asked. Percy didn't realize what he was talking about until he remembered why he was actually there.

"Yes," he told Fury.

"Good," Fury said, holstering his gun. "Have a seat. On the right side of the desk this time." Percy walked around the desk and sat down opposite the director, who was sitting in his chair.

"So, Fury, how do you want to do this?" Percy asked him.

"What I am about to tell you is highly classified information. Reveal any of this to anyone and you will regret it," Fury warned.

"Then I won't tell anyone," Percy said flippantly.

Fury took a thick file out of his desk and dropped it in front of Percy where it landed with a thump and he mentally groaned. He had been practicing reading for a few years and had gotten much better at it but it was still not the easiest thing he did. "What is this?" he asked, trying to avoid actually having to read it.

"This," Fury started before pausing slightly, probably for dramatic effect, Percy mused. "Is the Avengers Initiative."

A/N: Well, that's something. I hope.

I also wanted to see a Percy Jackson/Avengers story where Percy isn't an actual agent or the subject of a nationwide manhunt (again), so this story was born. Hope you like it.

I know, I know, I broke up Percabeth (again) and you may hate me for it. I just didn't know how else to justify his leaving camp and changing his life up so much.

Have a nice day, everyone, whether you're celebrating Christmas or not.

Follow, favorite, review, all that stuff. Thank you.

'Till next time

Manimal