My Iron Giant

-Protect and Serve-

"Eat this."

"Eh?"

A blond man with a tall hulking figure held out a single strand of hair to a very confused green headed teen. These two stood on the beach as the morning sun was rising above the shore. The larger one, the number one hero All Might had taken on a quirkless boy with a hero's heart to raise him to be the next symbol of peace. Right now, he was passing on the ability for the teen to do so.

But eating a strand of hair?

"Yes, well, to inherit my power you have to take in my dna!" All Might began to explain. "This is best, anything else would just be unsanitary."

"Did you was-"

"Of course I washed my hair! I don't want it to be any grosser than it has to be."

"Um, maybe I could-" He began to look for his water bottle, that was until the man grabbed his shoulder.

"Don't worry, I know from experience it's not as bad as it sounds." All Might gave a thumbs up to reassure the boy.

Izuku started to build up the saliva in his throat, preparing himself for the inevitable. With shaky nervous hands he plucked the hair from All Might's fingers and put it in his mouth. Desperately he managed to swallow the hair.

He waited for the new quirk to flood his veins…

"I don't feel any different." Izuku noted out loud.

"It could take an hour for you to digest it. But you should be absolutely ready by the entrance exam later today!" All Might assured the boy with a smack on the back.

"Is that All Might?!"

"Holy crap it is!"

Two beach visitors had spotted them. All Might was slightly annoyed at the interruption but he decided to play along.

"Come young Midoriya! Let us run like hell!"

He started kicking up sand at his speed, but he was holding back quite a bit for Izuku to sprint right behind him. Izuku kept running along the beach, thinking about how hard he had worked to get here, but he had to keep working harder to catch up to the man in front of him. He was given the chance to be a hero, but he was asked to be the best.

He couldn't let All Might down.

[Alert-New genome sequence detected.]

[Analyzing...Identified. Designation: One for All is attempting to link with Subject-Izuku Midoriya-]

[Scanning for viruses…..No virus detected, begin installing One for All update]


Izuku stood before the school of his dreams dressed in his middle school attire. He felt so anxious for the test, but he worked hard, even All Might was backing him! So taking his first step towards his dream, his foot caught on his own ankle sending him falling to the ground.

'My first step towards being a hero student...and this is how it goes.'

The stone ground inched closer and closer, until suddenly it stopped. He couldn't feel anything pulling him to the earth anymore and instead aimlessly floated. Kicking his legs he tried to turn himself upright but felt very unsuccessful.

"Hey, sorry for using my quirk on you without permission. But it would be bad luck if you fell right?" A sweet voice said to his right.

'Huh?'

It was a girl with chestnut brown hair, a round face, and a permanent blush on her cheeks. She gently picked up the boy with no effort and placed him upright. A muttered 'release' came from her lips as she put her fingers together. Izuku felt weight return to him but he was distracted by the fact that someone was actually paying attention to him.

"Man this is so nerve wracking. I hope I pass." She gave him a gentle smile, making him scramble to find words in his brain.

"Well, good luck!" She waved him off as she started jogging to the school.

Izuku stood there stupefied for about five seconds before smiling oddly to himself.

'I just talked to a girl!'

He really didn't.

But he was having a good day now.


All Might could tell Izuku wasn't having a good day anymore.

He watched the screens with several other teachers, his focus on how Midoriya kept narrowly avoiding getting hit by robots and students alike. One of them nearly took the young man's head off with a laser!

'Can he not use One for All yet? Or is he having a hard time using it?'

"We have a promising batch this year." Cementoss commented, sparking a conversation between the adults.

"We sure do~" Midnight said, eyes locked on some of one student who decided they didn't need a shirt.

"Nemuri, stop it, we don't need a law suit." EraserHead said from below, lazily watching from his sleeping bag on the ground.

"Come on Shota! These guys are blowing through robots faster than she could with a virgin" Present Mic joked.

"I don't need that mental imagery. Especially with how she still won't look away." EraserHead complained.

"Oh come on! You saying you don't get fired up by well toned youth covered in sweat?" Midnight shot back.

"No, cause I'm not a pedophile."

"Hey!"

"Enough everyone, we only have a few minutes to see how these ones will react in our real test." A small rat, mouse, bear thing named Principal Nezu said, gaining much attention from the others. His hand/paw pressed on a comically large button, earning silence and from the teachers.

'Young Midoriya, this is your last chance to show them who you are.'


Ochaco Uraraka was leaning against a building after taking out three more robots. She felt like she had a good amount, but she was hoping to do better. Her stomach was arguing with her from using her quirk so much. Nausea started to settle in, but she still had time to get a few more points!

The earth shook, causing her to nearly fall over and trip. Turning behind her she saw a massive robot heading straight towards her! This was the zero pointer?! It's more than just an obstacle, it's a hundred feet tall!

Not risking the chance hanging around she began to run in the opposite direction. She noticed a shadow moving to her giving her enough time to look up. The initial shake from the zero pointer had caused loose debris on top of buildings to crumble. One slab of concrete was falling down over her.

Reaching up, her hand barely managed to make it weightless in time, but she couldn't see the other one right behind it. It's mass pushed the other below it, pinning her and twisting her ankle.

"Ow!" She cried, this was getting worse and worse. How could she have made a mistake like that? Her parents work in construction for crying out loud!

Looking around she saw others running away, leaving her. She couldn't get out, so she tried to reach for the piece of rubble that was weighing her down. Her arms couldn't reach, it was too far.

The Zero pointer's looming shadow fell over her, filling her with a huge sense of dread. Was this it? Everyone seemed to run away, leaving her alone.

She was alone, her parents far away and no one to help.

"Please.."She begged out loud. "Somebody help me.." Her tears started to water, she was so scared to die.


Izuku was frozen, the fact that he nearly was crushed by robots slightly larger did not help the fact that the biggest one was approaching.

'Come on legs..Move!'

Something else kept buzzing at the back of his mind getting louder and louder. His eyes couldn't take themselves away from the zero pointer. He could see every bolt, every exposed wire, and in an attempt to forget about his paralyzing fear he was hypothesizing on how a giant robot would function.

The treads made it stable but they moved slowly and limited overall dexterity with how the legs were so stiff. The arms seemed to have the most strength given the size and movement they've demonstrated. The head was filled with so many sensors on the face,, probably to compensate for how small its targets were and how many it could proce-

He felt better now, maybe he could go find some more-

"Somebody help me.." He heard, making him stop before he could run. Turning back around he saw her, the nice girl from earlier. She looked so scared. Her eyes had the same look as Kacchan's when he was trapped in the sludge villain.

He tried to help then, but he didn't have any power.

That was different then, he trained, and All Might gave him his very own quirk!

His legs moved to action before he fully thought about it. Yet right now, he didn't care about fighting a giant robot, he only focused on one thing…

[New Primary Directive: Protect subject -Nice Girl-]

[Scanning threat...Alert: current physical parameters unable to eliminate threats.]

[Checking for suitable power source- Izuku: One for All: ]

[Rerouting One for All to Primary core]

[Activating (B)iometric (O)verride (T)echnology Protocol]


She could see someone, they weren't running away..They were running to her! She wanted to laugh and cry at the same time. She wasn't abandoned, she could still live! Her watery eyes blurred the person's features but she could see it was someone with messy hair. They were coming, whoever it was they could help lift the rubble off, or pull her out, or lead the robot away from her!

But, instead he was running towards the zero pointer, he jumped and-

*BOOM*

A giant flash of light with a clap of thunder blinded her senses. Wind blew her hair to whip wildly around her face as it felt like an earthquake. It went away just as fast as it came, but there was still a massive shadow covering part of the city.

A smaller but still firm shake made her look up, and made her eyes want to shoot out their sockets. Above her stood a new robot, it was humanoid shaped with military green metal making up every part of its body. It had thick gunmetal gauntlets that gleamed in the sunlight. It's eyes glowed a bright green that narrowed into smaller circles that bore judgement onto the zero pointer.

What surprised her the most and what made this new giant much more intimidating…

is that it dwarfed the zero pointer easily by being over twice it's size.


"WHAT THE HELL IS THAT?!" Hizashi screamed, making all the others cover their ears from the volume of his voice.

"Nezu, should we stop the test?" Midnight asked with concern, narrowing her eyes in suspicion.

"You think this is a villain?" Eraserhead questioned, uneasy with the development so much he got out of his sleeping bag.

"Now now, let's not be hasty. Who saw what happened?" The principal asked openly, intrigued immensely.

"Ignore what happened, what's happening?" Vlad King pointed out.

In front of Ochaco, examinees who could watch from a distance, and the staff of UA, the giant's hand that was level with the other robot grabbed the face of the zero pointer harshly, its fingers boring holes into it. It dragged the other bot with ease as it stomped away a few steps.

The smaller bot tried to claw away at the giant's hand to unlatch, but it only tightened its grip. Everyone watched with bated breath as it raised the zero pointer to eye level. It waited for a few seconds then moved with surprising speed for its size and chucked the robot out of the testing grounds.

Ochaco could only mumble to herself at the sight. "Holy-"

"-shit" Snipe finished in the teacher's viewing area.

"All Might." Nezu said with urgency in his voice.

"Don't worry, why? Becau-"

"JUST GO CATCH THE DAMN ROBOT ALREADY!" Midnight angrily smacked the muscled man to get him moving. He darted off a second later, off to intercept the flying zero pointer.

Soon after he left they watched as the few remaining bots that were hidden away started to converge on the giant. The rest of the teachers stood, anxious at the development.

"Call the test off for all areas and I want all the examinees away from the...unknown factor.." Nezu began, many already darting off to fulfill his instructions.

"You sure? Cause there's still one minu-" Present Mic began, until he was earned a deathly glare from Eraserhead. Soon after announcing the testing was over he joined the others in the race to battle center where the action was happening.

Vlad King and Eraser Head remained with Nezu as he used a separate screen to rewind the footage of the incident. He zoomed in on a single boy, running to the zero pointer.

"He has a powerful quirk." Vlad King commented, watching the transformation.

"Yes, but with the size he becomes it's hardly convenient for any populated area. Can't be stealthy, can't operate indoors, and would break every street he walked on. He'd have a better chance working in the military or in large scale construction...if he even has the precision." Eraserhead noted the aspects outloud, earning a frown from Vlad King about the harsh criticism.

"While we have seen a powerful demonstration of what his quirk can do we should not be quick to dismiss anything else it can or can't do. Until then we treat him as another student." Nezu said, earning a surprised look from both the teachers.

"You speak as if he's already enrolled." Vlad King said, looking for the forms with the boy's information. He started with the list of those assigned to the battle center where the giant is at.

"What other school is prepared to handle power that dismissed a zero pointer as if it was a toy?" Nezu stated, earning an annoyed tone from Eraserhead.

"Put him in the support course then, they could be more help but keep him away from my class."

"Eraserhead, this boy applied to be a hero. Shouldn't we give him the chance?" Vlad King said looking at the now found documents of Izuku Midoriya.

The information on it intrigued him. He came from a standard school, and there had never been any reports of a giant robot quirk. Otherwise the news would have highly encouraged him to be a top hero from childhood. But nothing...not even-

"Looking now he didn't even have the courage to take on one bot before using his quirk. As I see it the kid has no potential to be a hero. Put him in the support class. Even if he didn't apply we could make an easy exception based off his quirk." Eraserhead criticized.

"Now that is rare of you to judge someone based off their quirk." Nezu noted.

"There's a difference between an extra eye and someone who could destroy a skyscraper from sneezing. Though I'll give him a benefit of the doubt to not be locked up in isolation for not doing anything rash his whole life with that quirk. You'd imagine as a kid he'd want to show off at least once."

"Quirkless..He's labeled as quirkless." Vlad King held up the document, Eraserhead swiped the document and read it five times over.

"This...is unexpected."

"Maybe he didn't even know he had a quirk until the stress of today." Vlad King theorized, still very annoyed at Eraserheads judgement.

Nezu popped up on his seat noticing the giant on the move again. "All Might." He said over the comms to get his attention. "Have you taken care of the zero pointer's trajectory yet?"

"Yes, but it didn't need my intervention. It seems that it was thrown to one of the empty fields within the school's property."

"Excellent! We can have a clean up crew handle that. For now I need you to rush back and observe the giant's behavior. He's approaching a pinned examinee."

That snapped both the teachers to turn to the screen. Sure enough, it was walking back with its head focused on the girl.


Ochaco didn't know what she should be doing. This thing showed up, tossed the very thing that sent everyone running in the first place, and now she could feel its footsteps approaching. The whirlwind of emotions from earlier left her feeling slightly numb, she was anxious before the test, filled with adrenaline during the test, scared to death of dying, relieved about being saved, and now she was contemplating if she was going to die again.

*boom, boom, Boom, BOOM* It's shadow towered over her. Remembering an old film she decided to stay still.

'Maybe..if I don't move a muscle...it can't see me.'

The joints in the machine hissed as it moved down closer to the girl, crouching right above her.

'It can still see me!'

"Don't worry citizen! Why?"

The voice brought her relief, everyone knew that voice. All Might landed ten feet away from her, his smile making her feel safe despite the robotic giant looming over her.

"Because I am here!"

The robot paid him no mind, just looking over her.

[Subject -Nice Girl- currently experiencing minor ankle injury]

[Solution: relieve obstacles preventing movement and proper recovery]

"A-All Might! Thank goodness. I thought I might have died earlier." She breathed out, accidentally moving her hurt ankle making her flinch.

"Fear not! I will have you out of there momentarily. Please refrain from sudden movements while-"

One of the giant's hands moved slowly, coming closer to Ochaco and making her panic a little more. All Might watched with nervousness, but he kept thinking about who the giant was.

'Midoriya, is this how One for All manifested for you? More importantly do you have control?'

"A-All M-Might? What's it doing?!" She wasn't too open about the idea of it moving even closer to her.

"Hold on one minute, I think you may be making a new friend." All Might said, his muscles twitching in case he had to instantly jump in.

They both waited, as the giant carefully used its thumb and forefinger to pluck the large stone off her. Once that was done the weightless one started floating softly away. With a small push from the massive metal finger it was sent to drift to the otherside of the road. Ochaco watched in surprise at how precise and gentle it could be. Its fingers alone were bigger than All Might.

It held one out next to her, still watching but now the glowing in its eyes was softer and filled out the sockets, making it seem less threatening.

All Might grinned widely at the sight before speaking up. "It seems he wants to help you up!"

Ochaco looked back to the machine, looking at its face for any indication of confirmation.

Two metal pieces on each eye closed for a moment before opening backup. Was that a blink? A yes?

She trusted All Might at least, so reaching out she grabbed on to the helpful appendage. It lifted up a few feet, helping her to stand while leaning on it. Her mouth formed to be smile of bewilderment.

This was how her day was wrapping up? Meeting All Might and making a giant robot friend.

Looks like it can be a good day in the end.

Her robot friend opened its palm up, she decided to have a little fun and climb on the finger and slide down into it. Looking back she saw All Might with his bright smile, arms folded at the sight.

"You wanna lift?" She offered, patting the metal next to her.

"Hahaha! I appreciate the offer, but I think we should get you to-"

"Target located. Prepare to be destroyed"

A three pointer robot rounded the corner, the gun on its shoulder aiming at them.

'Did they forget to turn off the robots?' All Might thought.

[Primary Directive: Protect -Nice Girl-]

*CRASH*

The giant robot used its other hand and slammed down onto the small machine, the green eyes glowing brightly again and narrowed into much smaller orbs. More robots started coming around the corners, when met with the sight of the large machine and the girl they all charged and fired their weapons. That led to the giant standing straight up and cupping his other hand to protect Ochaco.

All Might stood straighter, his fists primed for punching. "Who forgot to shut down the robots?" He complained.

"All Might!" Present Mic called out followed by several other teachers.

"Ah, the cavalry has arrived! Good, we have a bit of an issue." He said, making them all feel more alert.

"Where is the girl?" Midnight asked in panic noticing the missing examinee.

"She's in the big guy's hands, but don't w-"

*BOOM*

The giant was treating the area as literal stomping grounds, smashing every bot that so much looked at him. All Might could see how nothing was really a threat to the giant robot, but he was making sure nothing could get close to touching the girl.

"Hey, can you get those bots to-" All Might began, but was interrupted by the shouting of orders from Snipe.

"Power Loader! Get those bots to villain response mode, we need everything we can get to bring that thing down."

"Now hold on-"

"Mic, try using your quirk to get it to open its hands.

"Wait, you don't-"

"Cementoss, restrain its legs."

"You really shouldn't-"

"Ectoplasm, when you spot the girl, get her out as soon as you can."

"Will you just-"

"All Might can help get those hands open"

*cocks gun*

"And I'll take out the eyes." Snipe finished.

All Might grabbed the revolver with his hand, pointing it away from the giant.

"No, you won't."

"Do you have a better plan to save that girl?"

"Don't any of you see it? He's already saving the girl from the robots!"

"..."

Everyone took a second to reexamine the scene. It was keeping its hands in the same point in the air to prevent jostling the girl while sweeping its feet along the ground and destroying the rest of the robots.

"Then….what do we do?" Midnight asked.

All Might sighed at the reaction the other teachers had. Then again, when was the last time any of them faced something of THIS size? Even he can't recall someone's quirk making them this massive. He knew One for All was a little different for his master, but this? Turning Midoriya into a giant robot? Speaking of..

"Get those robots to stop attacking them. He's reacting in defense." All Might said, getting the teachers to move.

'Now...what will happen to you Midoriya?'


Hey, this was an idea I had in mind just for the fun of it. I am super surprised I couldn't find ANY fanfiction with Izuku piloting or being a big robot. So, this is a personal pleasure for when I don't want to think too hard about things so don't expect big plots or anything like it. I use that for my other two stories and oh boy I have lots planned for them.

I might put more effort depending on how much attention this one gets. If you have ideas or any characters you want involved please send them.