Avengers-Sakura - Shinobi Themes Challenge #1: My way as a ninja

I love the MCU and DC comics (not the movies except Wonder Woman) and I love Sakura + non-cannon pairings and I thought, let's mash 'em together with the 50 shinobi theme challenge!

Hope you enjoy, please let me know if there are any pairings you want to see. I have a few mapped out but suggestions are always welcome.

Sakura heard the screams before she noticed anything wrong. Looking up from her sandwich, her eyes darted around for the threat but didn't see anything out of the ordinary in the cafe. A few other patrons were also perking up in their seats as conversations turned silent.

As most of the commotion was coming outside, she left her half eaten lunch, grabbed her backpack, and followed some of the others to the street.

There was chaos everywhere, people running, cars crashing, and humanoid creatures flying around. From the past few months she'd been stranded in this weird universe, there had been nothing to suggest this was normal.

People bumped into her as Sakura walked towards the blue light emanating from one of the buildings.

Stark Tower. Iron Man.

The creatures started firing and more screams erupted as everyone in the streets scrambled to find cover.

The injuries and casualties could already be in the hundreds.

The medic in her demanded she help in any way she could. The more rational side of her told her to lay low. Sakura couldn't afford to be exposed when she didn't know this world and what they would do to her. She was even wearing shorts and a red tee in an effort to fit in.

Based on what she had seen so far, no one used chakra. They were all civilians to her.

More reason to help.

Her team would come for her, she knew it and this place felt real. She knew it wasn't some figment of her imagination. The damage these creatures could do would be real.

There were explosions in the sky as Iron Man flew up, attempting to reduce the number of the aliens who came through the portal but he couldn't take the invaders and protect civilians.

Sakura began sprinting towards Stark Tower, knowing that the people in the area would be the most unsafe and in need of assistance.

"Get away!" She yelled to those frozen in the street, watching the danger come towards them. Very few paid any attention to her above the chaos.

When one of the creatures dropped down in front of cars stopped in the street, Sakura forced chakra to her feet and leapt over the terrified bystanders.

"Shannaro!"

Sakura felt the metal plate on its chest crumple under her fist as people screamed in alarm.

"Get out of here!" Sakura yelled again. Listening to her now, the civilians scrambled away, abandoning their vehicles and their belongings.

Dust and smoke permeated the air as the creatures shot beams of light at buildings and cars, causing as much destruction as they could.

Sakura damned the fact she wasn't dressed for this. Her hand tightened on the pack carelessly slung over her shoulder and she ran into the closest building. Sakura pushed past people fleeing the lobby and found an empty room. There was a building alarm going off, drowning out most of the sounds from outside.

Taking out a scroll, she summoned her belongings and weapons and changed quickly, foregoing her forehead protector. Sakura drew her gloves on and tightened her hands into a fist.

The building seemed to shake and the ground trembled as more screams and panic ensued. Taking a deep, fortifying breath, Sakura walked outside and discarded her pack before rushing towards Stark tower.

People barely noticed her in their haste and car sirens blared continuously.

The streets were emptying.

Good.

Those who were fleeing past her were covered in dirt, debris, and minor injuries but were otherwise fine. As she got closer to Stark Tower, the number of people running away decreased which hopefully meant they had been able to get away. But there were probably more people hiding in the buildings, too scared to run.

There was a metallic groan as a plane fell from the sky. At the sound of a deafening roar, Sakura's eyes darted to the portal and watched as something else came through. It was massive, easily as large as Katsuyu, maybe even larger.

And there was more than one.

A blast rang out and Sakura was forced to summersault backwards to avoid injury. She darted forwards, throwing shrunken at the alien. The blades ricocheted off its breastplate. Luckily, it didn't seem that adept at hand to hand and Sakura easily brought it down with a single punch, knocking it into the side of a building ten feet away.

If she wanted to summon Katsuyu and heal those with injuries, she had to get closer to the epicenter.

Sakura took down as many as she could as she fought her way forward and she noticed others in the air and on the ground capable enough to fight.

Hearing a cry coming from an overturned car, Sakura crouched down and saw two passengers pinned down by the crumpled dashboard.

"Hold on." She ripped one of the doors off and slowly lifted the vehicle for the two to crawl out. They supported each other to stand and one leaned heavily on his. friend.

"Can you run?" One of them nodded while the other shook his head and pointed to his leg.

Sakura wasn't close enough to summon Katsuyu yet but she couldn't just leave them to limp away. They would be sitting ducks. She took a step forward and cautiously brought a green glow to her hand. Sensing their apprehension, Sakura reassured them she wasn't going to hurt them.

The man released a breath when her hand touched his injury, providing some pain relief. Thankfully the bone had only cracked and wouldn't require much time to heal.

"Thank you."

Sakura smiled.

"Get to safety."

"Cap," Clint called a bit hesitantly. "You're not going to believe this."

"What is it Barton?" His voice was strained with effort as Steve fought off three of the chitauri and caught his shield as it bounced off the hood of a car.

"There's a giant slug with a woman standing on it. A woman with pink hair."

"I see her." Tony informed as he flew past and watched her take out an alien with her bare hands. "She's not on Loki's side. Anyone know where she came from?"

There were a series of negatives from the other members of the team.

"Ugh. Gross. The slug just broke up into more slugs." Tony cried as he contemplated shooting them.

They were surprisingly fast, crawling into buildings and down the street.

"Hey! What are these and who are you?" Tony asked as he hovered above her in case one of the slugs attached itself to him.

Her green eyes and pink hair were shocking enough but the lines that ran down her face and onto her arms rendered him almost speechless. He held up his repulsor, ready to shoot if she did anything shifty.

"My name is Haruno Sakura, I'm here to help." That wasn't much to go off of but it was enough for Tony to de-power his arm.

"And the pests?" He asked, gesturing to the side with a tilt of his head.

"Lady Katsuyu will be able to heal those with injuries. Please do not shoot her." Her tone was clinical and the warning was very clear.

Clint, listening in on the conversation through Tony's mic was skeptical at best but when one crawled on Nat, he was torn between shooting it with an arrow and risk the projectile going through the animal to clip Nat or leave it be.

"Please do not worry." A feminine voice that definitely wasn't Nat's rang through the coms.

"Was that-?"

"They're polite slugs." Natasha remarked as her panting ceased and the cut on her forehead closed. "I think she's legit. My wounds are healing and I'm not as winded."

The smirk 'Sakura' sent Tony was enough to have him narrow his eyes at her though she wouldn't be able to see it. He lowered his arm, willing to take any help they could get.

"We'll talk about this after this battle." The girl nodded then jumped a good forty feet into the air and felled one of the Chitauri worms with a drop kick. There was a crash then a prolonged silence as Tony tried to calculate just how her small body could handle such massive power.

Okay.

This really wasn't the time for this, but Tony had to ask. Because they were fighting a war together and he wanted to know if she could be trusted not to stab them in the back. "Why are you helping us?" He asked as soon as she landed a bit ungracefully on the street.

"Because, there are people who are injured and helping them is my way as a ninja."

"Did she just say ninja?" Clint's incredulous voice would have been funny if the girl in front of him wasn't deadly serious.

Super solider, couple of master assassins, the god of thunder, a Hulk, Iron Man, and a ninja against an army of aliens and the god of thunder's adopted brother.

Cool.

Let me know what you think! The next ones will be relationship oriented with Sakura and people from Marvel and DC.