A/N: Hi guys! In the last couple of days, I have read soooooo many crossovers for Fullmetal Alchemist that it isn't even funny. Anyhow… many of them got my interest, and I had an idea for fem!Ed since I didn't find any crossovers at all for that. So that's what this is going be. In the section selector, I opted for Avengers, but there will be characters from other stuff from Marvel too, like Agents of SHIELD especially in the beginning.

Please review, let me know what you think!

This is set in FMAB, when/after Ed gets Al's body back on the Promised Day. As for the Marvel Cinematic Universe… Post Age of Ultron movie but the timeline might get a little hazy with the other films after that for the purposes of the story, for Agents of SHIELD references beginning of season 3 [I know it just started, but I'm obsessed alright? So be warned of spoilers! But this story is AU of what went down in the actual series so many things won't be the same, I'm pretending like a lot of stuff didn't happen in season 2].

Chapter 1: Deals gone wrong

An all too familiar, great, white nothingness enveloped Edeline as she transmuted herself in order to make a deal with Truth to get Al's body back from the Gate. The blinding light was almost disorienting but given this not being her first rodeo so to speak, Ed just blinked twice to adjust as her eyes zoomed in on the outline of God.

"Well if it isn't the little alchemist again!" the faceless being smirked sarcastically at the teenaged girl standing in front of it, enjoying even the anticipation of the infantile tantrum it was going to get to its taunts.

Ed desperately wanted to rant about the comment regarding her height – the words were at the tip of her tongue, ready to burst out – but she held herself back. She didn't want to get on the wrong side of Truth. The State Alchemist had a mission to fulfill, namely getting her precious brother back, whom she saw sitting in a lotus position just behind the ultimate being, finally reunited with his soul. The only outward signs of Ed's rage were the clenching of her fists and a vein popping out on her forehead as she tried to compose herself. Truth's face fell a little in disappointment once it realized that tame reaction was all its provocation was going to elicit.

"What do you want now?" it finally asked flatly.

"My brother," the blond alchemist stated with determination evident in her eyes, pointing right behind Truth at Al with her index finger to emphasize her demand.

"Oohhh! How interesting!" Truth got excited again hearing that news. "And just what might you have to sacrifice for him? This isn't going to be cheap," it mocked her with confidence. Little did it know that she had come ready with a plan.

"My gate," Ed supplied instantly pointing with her thumb over her shoulder at the intricately designed silver-colored door just behind her. Truth's face got serious again.

"Well, well, well. You do realize that means your alchemy, right? You could never access this place ever again," it explained with no mirth in its voice as it stared at Ed with its eyeless face.

"I am fully aware," Ed acknowledged with conviction and even more determination – if that was even possible – as she stared back right at it. Truth remained silent for a while pondering on the offer.

"Well, that just isn't going to cut it for me…" the white being remarked snidely with its evil smile Ed was all too acquainted with. It could mean no good. "Did you really think you would be able to set the price?"

A flash of fear crossed Edeline's features. She hadn't prepared for the possibility that her offer was going to be declined.

"Well then, here is my proposition…" the little white man began as it got up from its lotus position and stood to face the girl who had been giving such enjoyment to it over the years. "In exchange for your brother to return to Amestris, you have to go and live in another world, far, far away from him."

"Noooo!" came the protest from Al who had been sitting silently thus far, just observing. "It's not worth it, Sister!"

"Silence!" Truth bellowed in anger. "You are not the one I am negotiating with."

Ed stood in silence as she mulled over this new deal. The price is always higher than what you are willing to pay, isn't it? – she thought grimly. But in her heart the alchemist knew, there wasn't really a price she wasn't willing to give for her little brother to have his normal life – everything – back. She smiled a sad, apologetic smile at Al then turned to Truth.

"Fine. I will pay the price," she uttered with venom in her voice.

"Oh! Great! Great!" Truth rejoiced in a sort of childish way while Al still objected in the background. "By the way, I will be taking your arm back, but keep your alchemy. Who knows, I might still need you for your talents," the white man smirked slyly as it brought up another gate similar yet entirely different from hers and Al's. Ed didn't even have time to react to this new development when the little black hands started to grab them the both and pull them toward their designated gates.

"No, Sister, don't do this!" Al called out as he was almost swallowed by his gate. Ed just shook her head at him.

"It's fine, Al, please look after Winry for me!" she yelled back as a farewell.

"I will find you!" That was the last thing the younger brother could say as the gate closed behind him just at the same time as Ed's and she was swallowed by darkness.

Agent Coulson and his team were aboard the newly restored Bus as they liked to call it. In reality, it was a high-tech airplane with the most amazing gadgets and weaponry you could imagine. It had been a rather slow day in their line of work of finding gifted individuals or inhumans. That is until all the sensors went haywire, signaling a massive surge of energy in the vicinity of downtown New York.

"What happened?" Coulson asked Fitz-Simmons, as they were in charge of monitoring the devices at present. "Don't tell me it's the Chitauri again."

"I don't think so. The patterns are different, but it does seem like a portal was opened from somewhere," Fitz answered as he studied the different readings frantically. Coulson hit the button for the intercom to the cockpit.

"May, new destination. We are heading for New York," he commanded with a sense of urgency in his voice. An energy spike this big had surely been spotted by H.Y.D.R.A. or other agencies as well, and he wasn't going to take chances with someone else finding the cause before S.H.I.E.L.D.

"Yes, sir," May muttered as she immediately set the plane on the right course.

"Skye…" he began to the agent who just entered the room.

"Daisy," said agent corrected with fond irritation.

"Yeah, right, Daisy," Coulson winced apologetically. It was hard for him to get used to calling his gifted agent by her new – well actually old – name. "You and Hunter are coming with me, something happened in New York that we need to check out."

Bright blue sparks erupted from the asphalt as an elaborate circular array made of light appeared on the ground in a back alley of East Harlem. The strange occurrence passed almost as fast as it started and no one – except for the few mice scurrying away, frightened by the electricity in the air that came without warning – seemed to notice the light nor the slouched form that had appeared right in the middle of said array as the light faded away.

A few minutes had passed before the lump, covered by a bright red coat, twitched as a small groan erupted from within its folds. Ed finally mustered the energy to turn on her back and coughed a little as she took in a shuddering breath.

"That bastard Truth…" she muttered under her breath as she finally sat up, taking in her new surroundings.

She was in some sort of back alley with trash scattered everywhere, that much she could ascertain, but the bright red bricks and style of architecture was nothing like anything she had seen before, even in Central City. These buildings were much higher than the two or three story ones she was used to for a residential area, and Central HQ could hardly count for comparison, it stood on a hill.

Deciding that staying put in one place for too long was too risky wherever here was, she tried to stand up, but her whole body ached and felt unnaturally heavy, with which sensation her yet again two auto-mail limbs did not help one bit.

Using the brick wall for support, she pulled herself up and staggered toward what she assumed to be the exit from the stinky dump she was in, only to fast find herself at a dead end. With a frustrated grunt, she turned around and continued to track the other way, finally succeeding to find a way out after a few corners.

The street she happened upon was bustling with people minding their own business, not even one paying the slightest bit of attention to the disheveled teen leaning against the wall just a few feet from them. Quite fortunate to be honest, since the alchemist was busy trying to make sense of what she was seeing, staring blatantly at the alien structures, and had little capacity to spare to fend off incoming attacks or deal with the unwelcome scrutiny. There were weird looking and – to Ed at least – ridiculously fast cars zooming up and down the street, loudly honking at whatever that might be inclined to get in their way. The blond alchemist's head shot up at a weird noise, only to find a silver-colored metallic train of some sorts running above her head on rails that were held in the air by massive beams of steel.

Of course, she had been reasonably confident from the moment she had woken up that she wasn't in Amestris anymore, but the scenery before her just confirmed the fact further. Hell, she wasn't even in the same world anymore. This place seemed to be technologically way more advanced, and it made Ed wonder whether alchemy was existent here. Whether the fact that Truth hadn't taken her alchemy would be of any help in this place.

She didn't have too much time to ponder on that though because as she was still peering at the weird rails and tall buildings surrounding it, she sensed the atmosphere around her change. People suddenly started running away from where she stood, and the area cleared quickly out. She glanced around and noticed three people approaching her with guns pointed at her head.

Agent Coulson had the area around the alley where the surge of energy originated from evacuated as quickly as possible, and they had blocked the entrance to the road from both sides. As they got closer, they noticed a weird looking kid standing mesmerized at the corner of the back street they were just looking for.

The boy looked young, maybe sixteen, judged from the facial features but was short in stature. His most striking characteristic that Coulson could see was his bright golden hair that had an almost unnatural shade to it. He wore his hair in a loose braid that ended just below his shoulders, his long bangs unrestrained, framing his face with only one small lock sticking up in the middle where his hair was parted in the most bizarre cowlick the agent had ever seen. Looked too styled to be accidental, yet Coulson for the life of him couldn't imagine why anyone would want to intentionally have an antenna on their head. The teenager was dressed in black leather pants, a bright red coat and what seemed like a black shirt underneath that, also white gloves and platform boots that appeared to have the purpose of elevating his height.

Given the teen's strange appearance Phil was reasonably confident that he was the objective of their mission. He gestured to the other agents as the last of the civilians ran past them to the other side of the barricade, and began to approach the boy carefully. Just then the target, who so far had been oblivious to the happenings around him, tensed a bit and glanced around, noticing the three of them.

Scratch that, the hair wasn't the most unusual feature on the boy. Coulson had never seen molten gold irises like this before.

The boy's expression hardened as he assessed the situation and stepped a half pace backward with his left leg, assuming a more balanced fighting stance, bringing up his hands in front of himself protectively, angling his right side toward them. Phil was surprised by this new development but could see that the kid was not a newbie when it came to hand-to-hand combat.

"Don't move and we won't harm you!" Phil ordered in a commanding but soothing tone hoping to avoid confrontation as they didn't know who or what they were up against.

The boy's eyes first widened in surprise then he scowled further not relaxing his stance one bit. Daisy glanced at Coulson for permission then lowered her gun at the slight nod of her superior.

"We are not here to fight you," she tried to persuade the golden-haired teen in a friendly voice as she took a step closer. "We are from an agency called S.H.I.E.L.D."

Ed's first surprise – well besides that she had three guns pointed at her head – was that she could understand what they were saying. The speech sounded foreign and not Amestrian for sure, but the words miraculously made sense to her. At least damned Truth had the decency to give me the language of this world. – she thought to herself as she quickly assessed her options. She still didn't know if alchemy would work, and these people did say they weren't going to hurt her, but she wasn't about to go trust the first people she encountered. Not without proof that they were trustworthy. And besides, even if alchemy did work, did she really want these people finding out about it?

The second surprise was when the brunette started to approach her in a calming manner. Got guts, I see. But then again, they knew nothing about her or her possible abilities, and she looked like a teenager to them. Plus the woman did have the other two for backup.

"Where am I?" Ed decided to try and talk it out first, maybe she could squeeze some much-needed information out of them.

"Manhattan," the lady answered without hesitation, still assuming a friendly demeanor but frowning when she saw the teen blink in confusion.

"And where exactly is that?" Ed tried again.

"New York City… The United States of America…" the unknown female agent continued with hesitation as she saw that no recognition dawned on their target. "Planet Earth…"

When the brunette saw that this wasn't going to go anywhere, she decided to take a different approach.

"My name is Daisy Johnson," she informed sweetly. "What's your name?"

"Ed," the alchemist answered in a clipped tone, still warily glancing between the agents. After all, there were still two guns on her.

"Hi, Ed. Do you have a last name?" Daisy probed further.

Ed thought for a moment about her answer but came to the conclusion that her name wouldn't matter in this world anyway, they wouldn't have any means to learn her true identity through that. Not unless, they knew about the Gate and her world on the other side, and by some sick twist of fate also about the Fullmetal Alchemist too, but she found that highly unlikely. If they did though, then they could give her information on how to get back.

"Elric," she answered finally.

Just then a loud, oscillating sound above her head startled her, making her act on instinct. She clapped her hands together, alchemically bringing up a curved wall of concrete in front of and above of herself – as she was expecting for something to fall on her – and made a run for it in the direction away from the strange men and woman. When Ed finally looked up to find the source of the perceived threat, she saw a weird teardrop shaped metal body with propellers on the top and tail of it fly away high above in the sky. It was too late already though, the agents had witnessed what she had done, and the man who had not spoken to her yet started to fire at her running form, once hitting her, only in the right arm, fortunately. She could also hear a distinct "Damn it." from the other man who seemed to be in charge as they sprinted after her.

"Ed, wait!" the one named Daisy called after her. Ed didn't intend to stop, but unfortunately, the earlier unusual heaviness in her limbs and the effort of the previous transmutation slowed her down considerably, making it possible for the girl to almost catch up to her.

"Daisy, don't go near him, he is dangerous!" the older man warned Daisy, and it barely registered somewhere back in Ed's mind that she was taken for a boy. Again.

Go, figure… – she thought to herself just as she noticed that the lady had stopped chasing her, taking a weird standing stance with legs wide apart and one arm extended in front herself, face scrunched up as if concentrating. Just then the ground shook under Ed's feet – and only under her feet – harmlessly making her stumble and fall due to the unexpected shift. The two male agents arrived by her side, quickly restraining her, making sure to keep her hands separated from each other. She tried to struggle out of their hold, but it was useless. She wondered whether the thing the girl did with the ground was alchemy, though she saw no transmutation circle nor the stance the agent had taken indicated it to Ed that it was alchemy. She made a mental note to herself to ask about it later.

"Ed, please, we are not trying to hurt you!" Daisy tried to calm the teen down after she jogged up to the three of them.

Ed huffed in disagreement but ceased her struggling which earned her the privilege of being released from the two men's hold when Daisy nodded them to.

"I think this guy over here didn't get your memo…" Ed grunted nodding her head to her left where the younger male was.

"Has he shot you somewhere?" Daisy asked with a bit of worry looking for signs of blood.

"My right arm, but it's fine, it's…" she started to explain, but the girl was already tugging down her coat from her right shoulder looking for the wound only to gasp when she saw her auto-mail.

"Like I said, it's fine," she said grudgingly as she yanked the red fabric back over her shoulder.

"We need to move out," the older man on her right warned before Daisy could question the teen further on it though. "I don't know how much longer we will be without company. We can continue this on the Bus," he looked down at the blonde with curiosity shining in his eyes.

Ed rolled her eyes at that but went with the agents without further resistance. It's not like she had the energy to do anything besides that anyway.

After they got into the big black bulgy looking car, the two men were finally introduced to her too.

"My name is Agent Phil Coulson," the older one said then pointed to the other. "And this is Agent Lance Hunter."

"What is this shield you were talking about earlier?" Ed asked. She needed to gather as much information as possible if she were to get around in this world.

"S.H.I.E.L.D. – Strategic Homeland Intervention, Enforcement, and Logistics Division," Coulson explained. "It's a government agency tasked with combined military, scientific research, and espionage activities regarding threats beyond the scope of standard national security agencies."

Ed just sighed in resignation. Yet again she had been found by some weird military, to be recruited she was sure. She also had a feeling that she wouldn't have much choice in the matter either.

They drove into a huge park in the middle of the city and stopped in an empty clearing. The others piled out of the car, so Ed followed their suit.

"And this is the Bus," Coulson announced which confused Ed for a second as she saw absolutely nothing there, but then suddenly the air started to shimmer in a weird way, and soon another piece of technologically advanced vehicle appeared in front of them.

"Come," Daisy gesture to her as Ed stayed rooted in her place, gawking at the thing while the others had already boarded. Ed picked up her pace to catch up to the lady agent, but her eyes never left the machinery.