A/N: Adelaide is my new obsession and this story kind of just popped into my head out of nowhere. This is a Peter Parker x OC fanfic, but it's a little more than that because Adelaide will have a relationship with other Avengers too. Anyways, so Peter will appear around chapter 7, 8, or 9. Not sure yet because I don't plan, I just write as it comes to me. Which is also why I still need to plan how Peter's timeline coincides with Adelaide's.

The story is set well after Iron Man 3 and about a little less than a year before Age of Ultron. My goal is to continue the story into Infinity War and Avengers 4, but the MCU timeline is a mess so we'll have to see how I work around that. For certain, the story will go Infinity War and Avengers 4. Just FYI, since it's been a while since Infinity War came out, there might be some spoilers in the A/N, but I'll try to warn you before they come.

I will say that this first chapter is kind of like the 'pilot' and shorter than usual, but hopefully the rest will be a bit longer. I'll try to update regularly since it's summer vacation right now, but no promises.

Also, this story has a trailer and it would be amazing if you checked it out because I worked super hard on it and I personally think it's very fitting. Here's the link, tell me how it is!

watch?v=OapBMts_H6U

I won't drag this out any longer, so here it is!

"…I've always wanted a

strange teenager to show

up at my doorstep,

half dead."

When Adelaide Rivers woke up in the Stark Tower, she had no idea how she got there or why her head felt as if it was being repeatedly hit with a hammer. No, she didn't know why Tony Stark's head of security, Happy Hogan, was pacing in front of her, talking on the phone in a hushed manner. No, she didn't have any recollection of anything before she opened her eyes. No, she couldn't figure out why Happy looked so worried when she began to stand up. And no, she didn't know why she felt so dizzy. There was a loud ringing in her ears that she couldn't shake off and it seemed to block all other sounds. Her vision was blurry, yet she couldn't clear it up no matter how many times she blinked or shook her head.

At first, it was quiet. Then it got louder and louder until, all at once, her vision and hearing cleared immediately. She could then clearly see Happy forcing her to sit down as her dizziness began to fade away and the room turned right side up.

"Hey, hey, kid you alright?" She rubbed her forehead, begging it to stop pounding. It seemed to be screaming at her.

"I – what? Where am I?" she asked, dazed. Happy paused for a heartbeat, contemplating.

"The Stark Tower," he answered. She looked at him in dismay.

"What?"

"Look, kid. I don't know you, you don't know me, okay? So let's start with me. I'm Happy Hogan, Tony Stark's head of security." Adelaide could do nothing more than blink at him, causing him to release a heavy sigh.

"…And this would be the part where you tell me who you are," he said slowly. She blinked once again.

"I –" Suddenly, the ringing in her ears hit her again. She pressed her hands against her ears, trying to get it to stop, when the dizziness started once again. Adelaide felt her stomach tying itself into a tight knot and suddenly, her vision went dark.

When Adelaide woke up again, it was a similar situation, but an entirely different room. This time, Tony Stark himself was in the room, yet he failed to look even slightly stressed or worried that there was an unknown teenager sleeping on his couch. The ringing in Adelaide's ears had ceased, yet her head was pounding faster than her heart. She felt the dizziness once again as she began to stand up. Tony turned around, noticing.

"Hey kid, you alright? I'm Tony, by the way," he said, extending his hand out for a formal handshake. The girl looked at him like that was obvious. He retracted his hand, clearing his throat. "Right. You probably already knew that."

He turned around and began walking back to his desk.

"So what brings you here?" he asked, glancing back, "Other than a very tired Happy Hogan." Adelaide looked around the room, trying to get familiar with her surroundings. She was in a basement of some sorts. She noticed the display of the Iron Man suits along the wall and the huge workspace in the middle of the room. Tony was still talking, she realized.

"…I've always wanted a strange teenager to show up at my doorstep, half dead. I – what's your name again, kid?"

"Adelaide," she answered, feeling a little fazed.

"Uh, yeah, no. Too long. Can I call you Adie? I'm gonna call you Adie. So, Adie, how do you like your juice?" he asked, walking away, "Orange? Apple? Orange and apple? Iced? Iced with orange and..." His voice faded away as he went into another room. All those questions made her head ache even more. Her gaze fell on the desk Tony was working on and she walked to it. There was an arm from the famous Iron Man suit. It was open, revealing the mess of tangled wires and complex parts inside. Her eyes wandered over to a picture frame of a ginger-haired woman in the middle of a laugh with her eyes crinkled at the corners; she seemed as if she'd never hurt a fly. Adelaide recognized her from the news as Pepper Potts, Tony Stark's girlfriend and CEO of Stark Industries.

Suddenly, she felt a tap on her shoulder. Adelaide swung around and twisted his arm behind his back, making him cry out in pain before she realized it was Tony.

"It's just me," he said, his voice strained. She dropped his arm, embarrassed. Where had she learned that?

Tony turned around, stretching his arm in pain.

"What the hell was that?" he asked, surprised that a fragile teenager like her could take him so easily.

"Self-defense," she answered with a subtle underlying tone of humor.

"Right," he said sarcastically, rolling his shoulder, "Anyway, I was out of juice so I got you a Coke." He picked the can up from the desk and handed it to her.

Adelaide took it and carefully brought it up to her lips which, she realized, were dry and bleeding. They stung as the cool liquid touched them, yet she was grateful to have something in her stomach. The girl couldn't remember the last time she'd eaten. Tony watched her as the teenager seemingly swallowed the whole can in seconds.

"Do you –" he glanced back into the kitchen, "– Do you want something to eat?"

She glanced into the kitchen behind Tony.

"No," she said, but then her stomach growled and Tony gave her an incredulous look, leading her into the kitchen.

"Pizza sound good?" he asked. She nodded. He heated it up and tossed her another Coke which she caught with ease, without looking up, too meddled in her thoughts. This seemed unsettling to Tony. He wondered if the girl was a shapeshifter who was actually a combat-trained criminal instead of the tiny teenager who sat before him. Tony convinced himself that she had just caught him off guard, that's all. He could've taken her if he wanted to. He was Tony Stark. He had defeated many villains and this was just a teenager.

The billionaire put the pizza in front of Adelaide, but snatched it away before she could grab it.

"Yeah, yeah, call me mean, but I'll only give you this if you talk. Deal?" he said. Adelaide tried to consider it, but her stomach growled once again.

"Fine," she mumbled. He carefully slid the plate back to her and she began gobbling it down in seconds.

"вкусно," Adelaide mumbled. The word had just slipped out of her mouth. Tony heard it, even though she had mumbled it with her mouth full. He pulled a chair and sat down in front of her.

"I heard that. That sounded like Russian. Was that Russian? What did you say? Do you speak Russian? Adie, do you speak Russian?" He threw the questions at her so quickly, her head began aching again, a dull throbbing that seemed impossible to ignore. Yet, Adelaide had the same questions as Tony. How did she know Russian?

"I-I don't know," she answered, "I think?"

"Alright kid, now I know my Russian's a little rusty so just stick with English for now, okay? So tell me your name," the billionaire asked, "Your whole name."

"Adelaide Maxwell Rivers," she answered, the name just rolling off her tongue.

"Too many syllables. I'm still calling you Adie," he said and waved the topic away. Adelaide tried not to roll her eyes. "Next question. Where're you from?"

She hesitated. The truth was, she had no idea. She had no memory of anything before she had opened her eyes. Yet, for some reason, something in the back of her mind told her she was supposed to be here. Adelaide felt as if she was in the right place.

"I don't know," she said, "I can't remember."

Tony eyed the teenager carefully.

"So you're telling me, that you passed all the security on your way into the Tower, woke up at the Tower, and have no idea how you got here?" he asked. "And I thought I was having trouble remembering where I put my keys," he mumbled to himself.

"I don't remember anything before that, either," she pointed out.

"Yeah, I got that," he said, looking deep in thought. He looked up. "Tell me something else. Anything that pops into mind."

"I'm 13," Adelaide said. Tony was reminded of how she had his arm twisted behind his back before he even had the chance to react. He made a mental note to program JARVIS for combat lessons.

"I can speak English, Russian…German, and Ukrainian. Oh, and Spanish. But only a little."

"Yeah, not important," he said, "Who're your parents?"

"I…" Adelaide didn't know. The teenager had no idea who her parents were. She didn't even know what they looked like, let alone their names. She had no image of them in her mind.

"Let me guess," the billionaire said, "you don't know. That's starting to become more and more annoying, you know that?"

He was right, Adelaide thought. Her lack of memory was bothering her. Why didn't she know? What had happened before she opened her eyes? Where would she find the answers? But the real question was, would she be able to handle them?