So I published this first on A03, where I am allowed to have a longer summary, so here is the actual full summary:

Alyssa thought she would have a peaceful vacation in Johannesburg. And she did, that is, until a green monster started rampaging through the city while fighting none other than Iron Man. The monster is defeated, but only because Alyssa decided to lend a helping hand, thus bringing her to the attention of the Avengers. Steve Rogers on the other hand, is still ailling over his first love, Peggy Carter, but this new woman is intriguing to him and under his watchful gaze, she become invaluable to the Avengers. Will sparks fly between the two? And how will this affect the Avengers and the world?

Prologue

Alyssa stepped out onto the streets, sliding her sunglasses down over her face to block the sun from her eyes. Johannesburg was quite the city and she was glad that she had decided to visit. It had always been a dream of hers to explore the world and to see the various cultures and people that inhabited it. Which was why every summer she took a vacation and picked a place in the world she had never been to. It had been her thing for the past two years, and this summer she had flown to Johannesburg. The day after tomorrow, she would leave for Nairobi and then Cairo.

She felt her stomach growl a bit and knew that it was time for a lunch. But where to? She pulled out a travel brochure and found the section where it recommended various restaurants and shops to eat at. There were so many options, she didn't think she could possibly choose. Maybe something more familiar, and then later at dinner, she could try something new? No, she might as well start now, and she could pick a random place for fun.

Her thoughts were interrupted as a loud roar thundered across the city. People were running and shouting, and Alyssa turned west, which seemed to be where the chaos was coming from. She could sense the danger, but what was happening? Her instincts told her to run, but she took shelter behind a parked car on the street and soon enough, she got her answer as a giant green creature came into view. It looked to be a little over eight feet with oversized muscles and short dark hair. He slammed his huge fists into the ground before hurling a car into the air. Before he could attack again, he was struck and sent flying by what appeared to be Iron Man?

She frowned. Who didn't know the arrogant, self-obsessed, billionaire that was Tony Stark? A man so intelligent that he built a suit that could defend, fly, and shoot with a various range of weapons? And here he was half-way around the world in South Africa of all places. His suit was much bigger though, which she supposed he needed considering the size of the green monster he was fighting.

The sounds of sirens echoed around her and more people ran and stumbled past her, screaming in utter terror. She was going to leave, but against her better judgement, decided to take a closer look at the situation. Alright Alyssa, she thought trying to keep herself calm. Don't do anything stupid or dangerous. The green monster hurled a car in the air like it was a softball, but the Iron Man dodged it. As she got closer, she could see hints of red around the creature's eyes and frowned. Something was troubling him, she could sense it. It only got angrier and angrier, despite the attempts of the Iron Man to calm him down. The Hulk hurled Iron Man through the air into a building and turned back to his rampage.

In that moment, she made a decision and decided to concentrate. She focused on the monster, making sure that it would only affect him. As she desired, her illusion came into being. It was a peaceful place with fresh green grass and a variety of flowers in various shades with trees and birds and the bright yellow shine of the sun. The monster reeled back in confusion at what it was seeing. It whirled around in the opposite direction, but still he only saw the peaceful field that Alyssa wanted him to see. He was distracted and that was all the opening she needed.

With all of her might and concentration, Alyssa shot her fist forward, a great bright blue beam erupting from it. It streaked through the air in a round bolt and struck the green monster as intended. She threw another one, careful to duck back down again, hoping no one would catch her against all hope. Concentrating once again, she searched for his mind and easily found it, that great big, vibrating pulse of chaos. She could already detect the corruption, but she had no interest in healing the creature's frazzled mind. She intended quite the opposite. With every effort, she scrambled it, with the intent of causing such a disarray that he could no longer function. The monster clutched its head and roared, and Alyssa carefully stepped out from behind the car, pulling up the hoodie of her jacket over her head and approached. She felt the power surge in her hands and was about to aim when Iron Man shot down and hurled a great big fist in the monster's head sending him sprawling to the ground with a great boom. It didn't get back up.

The Iron Man turned, and Alyssa held up her burning bright blue hand in warning.

"Who the hell are you?" She heard his voice from the suit and shook her head. She could hear the approaching sirens and knew it was time to go.

Alyssa ignored him and turned on her heel and walked away, quickly picking up her pace. She wanted to get away from the scene as fast as possible. What the hell was she thinking anyways? Interfering like that? Suddenly, she felt very light headed and her body felt weak. She kept walking, but the world started spinning and she felt her legs crumple, and everything went black.

….

The rest of the Avengers had assembled onto the Quinjet where Tony, and Bruce awaited along with a mysterious, unconscious, woman who was strapped against the seat across from Banner.

"Tony, what the hell is going on?" Steve demanded, looking at the young woman Tony had brought aboard. She looked to be in her early twenties with warm brown skin that reminded him of clay, dark brown almost black hair that fell into tight curling springs that framed her face. She had dark brows, full, plump limps, and long lashes. Even though she was sitting down, he could tell she was about a few inches above average height and slender. He had to admit, she was very beautiful, and he had seen plenty of beautiful women in his day and in the present.

"I'll explain Cap, but right now, we need to get the hell out of here right now," Tony said, pointedly as Clint took his seat and began to power up the Quinjet. It took off and everyone got situated. Banner was wrapped in a blanket, breathing heavily, opposite the mysterious woman.

"Well?" Steve prompted impatiently, and Tony sighed.

"That witch screwed with Banner's mind and set him loose on Johannesburg," he said, before he turned and motioned to the woman they were discussing "Even though I dealt the final blow, no offense big guy," he said apologetically to Bruce who grimaced but nodded his understanding. "She took him down, her hands were glowing blue and she could emit some form of energy from them, and she did something else." Steve's narrowed his eyes. Something else?

"The other guy," Bruce said heavily. "He saw something strange, something that wasn't supposed to be there."

"What was it?" Natasha asked, and Steve could hear the concern in her voice. The two of them had nursed soft spots for one another for quite some time.

"It was like a field of some sort," he said with a sigh. "A quiet field with flowers and sunshine."

"How do you know this wasn't a part of the witch's deception?" Thor asked, and Steve found himself agreeing with his line of questioning. It could have been a trick designed to make the Hulk even more erratic in the moment.

"I doubt it, it calmed the other guy down a bit, though he was confused as well," Banner said wearily.

"Another sorceress?" Thor mused, raising a golden eyebrow. "And you defeated her in your suit of iron, Stark?"

Tony snorted. "More like she walked away and then collapsed, probably a result of using whatever powers she has on someone like the Hulk."

Clint turned on the communication monitor and Maria Hill's face appeared on the screen.

"The news is loving you guys," she said wryly. "Nobody else is. There's been no official call for Banner's arrest, but it's in the air."

"We need to lay low for a while," Steve said stoically. "Stay out of the public eye, until the emotions die down." It would give them the needed time to recuperate and to come up with a plan.

"I have a place in mind," Clint said, as he punched a number of buttons.

"And what are we going to do with Stark's guest?" Natasha asked quietly as she took a seat next to Banner.

"I think she can prove useful," Tony answered, glancing at the young woman. "And if she can mess with Banner's mind like that, well then who knows what else she is capable of?"

"And besides, I couldn't just let her run amok after I saw what she was able to do," he continued with a casual shrug. "Didn't know whether she was friendly or not."

"And most likely she won't be friendly with the way you handled the situation," Steve said coldly. Leave it Tony to be so reckless and callous to the consequences.

"I don't about everyone else, but let's try and avoid a battle while we're thousands of feet in the air," Clint said, and Tony smirked.

"I'm sure between me, the Cap, Romanoff, and Lightning Rod over here, she won't stand a chance."

"Well, looks like your about to find out," Banner pointed, and everyone turned to the woman who began to stir in her seat. Steve removed his shield from his back, ready to deflect if somehow, she was able to break free and attack. Thor held up his hammer and Natasha rose, sinking into a fighting stance. The woman stirred some more and suddenly, and deep brown eyes shot open.