Y/N and the Multiverse

but you have to

"Look, you're all over the news!", your boss exclaimed happily and switched between channels, all of them showing the news of the exploded building. "Good job."
You just nodded and headed to your room since it wasn't allowed to be somewhere else without an order. Waiting for dinner you decided to do one of your workouts to stay fit. If you didn't and were worse than the others, you got put back to your treatment.

"There is someone you have to pick up and get here to this room. Can you do that?"
You nodded.
"If someone sees you, kill them", your boss ordered and you nodded again.
Getting the coordinates, you traveled to a hospital room and saw a man sleeping in his bed. Luckily he wasn't getting monitored, so you pulled away his blanket and wanted to pick him up when a little girl entered the room.
She hadn't seen you yet because her gaze was on the floor when she said: "Hi, Dad, I made something for you. Mom will be here soon."
But her gaze shot up and you rushed to her, pressed your hand on her mouth, and closed the door. She tried to free herself but was too weak. Your hand around her throat ended her life.
She dropped to the floor and you headed to your target, grabbed him, and traveled back to your boss.
"Great", your boss said smiling, "did someone see you?"
You nodded.
"Who?"
You didn't want to talk so your boss slapped you across the face.
"I asked you something!"
"His daughter", you answered and he nodded.
"Go back to your room now", he ordered and you complied.

You dreamt something, which was the first time you could remember. It was about a man with a metal arm and you both seemed close. Who was he?

It was cloudy when you lay on a rooftop and watched a young man with his friends. You got ordered to get the information he had and kill him right after.
They were walking to a coffee shop and came out two hours later, saying goodbye. Finally.
You got down and tried to not get noticed but he was always looking around, he must have known he got followed.
You walked past him, your hair covering the side of your face, and hid between the mass of people. You knew where he wanted to go so you chose a dark alley and waited for him. When he reached it, you pulled him into the alley and hid behind the building.
"Leave me alone!", he yelled, "help! Help!"
You punched him in the face and he fell to the floor. Grabbing a rope, you shoved him to the fence and tied him to it.
"I didn't-... y/n?"
You punched him again and he groaned in pain.
"You don't have to do this", he said, "just... let me free and we can go to the tower."
You searched through his stuff and found his phone. Opening the latest messages, you found a few to 'Mr. Stark' and wrote one yourself.
"What was the password again? I forgot it."
"What are you doing there?", the boy asked.
"You mean the one to my workshop?", was the reply.
"Yeah", you wrote and waited.
"72974"
"We can help you, please let me go", the boy begged but you shook your head.
You wrote "Are you Spiderman?" and showed it to him, he swallowed.
"I'm just a boy going to school and hanging out with friends, please let me go."
"Don't lie to me Peter Parker, who is Spiderman?", you wrote and showed him.
"I don't know, okay? I don't know!" He was panicky but when he looked up he relaxed a little so you looked up as well.
"I don't care on which side you are, if you hurt him, I'll kill you", Ironman said flying down.
You grinned and shot Peter without even looking at him.
"Your choice", Stark said and began his attack. You dodged and shot at him but his suit was bulletproof. You freed Peter and used him as a living shield, pointing your gun at his head.
"Mr. Stark, am I going to die now?", Peter asked panicky.
"No. You'll have a long life and I'll make sure of it", Stark said angrily.
"What do you want?!", Stark asked but you didn't reply.
"She can't talk", Peter told him and Stark furrowed his brows.
"What did they do to you?", Stark asked, the first time you heard a hint of empathy in his voice.
You closed your eyes and Stark yelled "No!" but you pushed Peter away from you before you traveled.
"Is Spiderman dead?", your boss asked and you nodded though it was a lie. He left the room, came back a few minutes later, and slapped you. "Doc!", he yelled. He knew you were lying.