U.A. High — 5:40 a.m.
The corridors were almost completely silent.
No shouting.
No explosions.
No Present Mic echoing through three floors at a volume normally reserved for stadiums.
Just the soft hum of U.A.'s security systems and the faint blue light of early morning spilling through the windows.
Principal Nezu was already awake.
Naturally.
A steaming cup of tea sat beside him while several holographic screens floated above his desk.
Class 1-A.
Training footage.
Entrance-exam statistics.
Support Department reports.
And one particularly large file labeled:
ANTHONY EDWARD STARK
Nezu took a sip.
"You've been standing in the corner for six minutes."
Nothing moved.
Nezu smiled.
"Your stealth Quirk is excellent, Director Fury."
A shadow near the wall shifted.
A tall man stepped forward.
Black coat.
Black boots.
One eye covered by an eyepatch.
Nicholas Fury Jr.
Vice Principal of U.A. on paper.
Director of S.H.I.E.L.D. everywhere that actually mattered.
Fury looked toward Nezu.
"I was seeing how long it'd take."
"Six-point-three seconds."
Fury stopped.
Nezu drank his tea.
"I simply didn't wish to spoil your entrance."
Fury's expression remained completely flat.
"Cute."
He approached the monitors.
Tony Stark's training footage played across them.
Repulsor flight.
Nanotechnology.
Direct machine interfacing.
Thor's lightning.
Bruce Banner tearing through a combat robot while simultaneously protecting two classmates.
Steve Rogers moving through the battlefield with his shield.
Bucky Barnes reshaping his cybernetic arm.
Pepper Potts forming a Rescue barrier around injured students.
Fury crossed his arms.
"Tell me something."
Nezu's ears twitched.
"Do we really need another Stark in this building?"
Nezu looked toward Tony's footage.
"Another?"
"You know what I mean."
Fury enlarged the video.
Tony's armor flowed across his body.
Not from a suitcase.
Not from external equipment.
From him.
Nanotechnology emerged from Tony's own Extremis-integrated storage system and built the Mark XXIII around him in seconds.
Fury stared.
"His father builds S.H.I.E.L.D. infrastructure, rewrites half the world's energy industry, sticks reactors in hospitals and somehow still finds time to make weapons I don't know about."
Nezu smiled.
"And now?"
"Now his fifteen-year-old son walks into my school with an artificial intelligence in his head, armor inside his body and enough processing power to break our encryption during lunch."
Nezu corrected him.
"During an entrance examination."
"That doesn't improve it."
"No."
Nezu sipped his tea.
"It makes it funnier."
Fury stared at him.
Nezu smiled innocently.
Fury looked back at Tony.
"Every Stark thinks he's the smartest man in the room."
Nezu tilted his head.
"Is he?"
Fury's jaw tightened.
"That's the problem."
Nezu laughed quietly.
Fury changed screens.
Tony speaking with Izuku.
Tony studying Momo's costume.
Tony and Bruce working until well after midnight.
Tony's holographic simulations for the Midoriya Power Distribution Project.
Fury became quieter.
"He isn't just building equipment."
"No."
"He's changing people."
Nezu put his tea down.
"Helping them."
"Same difference if you do it badly."
Nezu regarded him.
"You don't trust him."
Fury looked toward Tony's image.
"I don't trust anyone with that much ability who hasn't learned what consequences look like yet."
There was no hostility in the statement.
That was what made Nezu pay attention.
Fury wasn't afraid Tony would become evil.
He was afraid Tony would make a mistake large enough that being good wouldn't matter.
Nezu understood that fear.
"Then teach him."
Fury looked over.
"He'd never listen to me."
Nezu smiled.
"Then make him believe it was his idea."
Fury stared.
A tiny smile appeared.
"That is disturbingly manipulative."
"Thank you."
Fury looked toward the monitors again.
Bruce Banner sat reading at 5:40 in the morning.
Steve Rogers was already running.
Pepper was organizing notes.
Tony was in Stark Tower remotely modifying an armor system he had supposedly finished three days earlier.
Fury shook his head.
"They're a mess."
Nezu's smile softened.
"A promising mess."
"Chaos with better branding."
"Precisely."
Fury turned away.
"Fine."
Nezu raised an eyebrow.
"Fine?"
"I'll watch Stark."
Nezu smiled.
"I thought you already were."
Fury stopped at the door.
"One more thing."
"Yes?"
"If the kid hacks my systems again—"
Nezu waited.
Fury's expression became almost amused.
"—make him work harder for it."
Then he disappeared into the hallway.
Nezu lifted his tea again.
"Interesting man."
Stark Industries Japan — 3:17 p.m.
Momo Yaoyorozu had been inside expensive buildings her entire life.
Her family possessed enough money that entire companies behaved differently when the Yaoyorozu name appeared on a guest list.
She understood wealth.
She understood influence.
Stark Tower was different.
It didn't feel like wealth built the building.
It felt like somebody had given intelligence an unlimited budget.
Glass elevators moved without visible cables.
Robotic systems passed overhead carrying prototypes.
Holograms existed almost everywhere.
Arc Reactor energy flowed through transparent conduits beneath the floors like blue veins.
And Momo couldn't stop looking.
Her mother noticed.
"You like it."
Momo straightened.
"I am studying it."
Her father smiled.
"Of course."
Three black Yaoyorozu vehicles had arrived at the Stark complex together.
That had been unnecessary.
Momo knew it.
Her parents knew it.
The security team insisted anyway.
Then Tony Stark had responded by sending two autonomous drones to escort them from the front entrance.
Momo suspected this entire meeting was going to involve ridiculous amounts of technology.
The elevator opened.
Pepper Potts waited inside.
"Mr. and Mrs. Yaoyorozu."
She smiled warmly.
"Welcome to Stark Industries."
Momo's mother returned the greeting.
Pepper looked toward Momo.
"Tony's been waiting."
Momo blinked.
"For me?"
Pepper smiled.
"He hasn't stopped talking about your Quirk for three days."
Momo's father raised an eyebrow.
Momo's face warmed.
Pepper immediately added:
"Scientifically."
Momo's mother hid a smile.
Pepper sighed.
"I probably should've led with that."
The laboratory doors opened.
Momo stopped.
Tony stood in the middle of a holographic storm.
Literally.
Dozens of molecular models rotated around him.
Bruce Banner sat at another workstation, one massive green hand moving surprisingly delicately across a touchscreen.
Mei Hatsume was underneath a table.
Nobody asked why.
Tony looked up.
"Yaoyorozu."
Momo smiled.
"Stark."
Tony's eyes moved toward her parents.
He walked forward.
"Mr. Yaoyorozu. Mrs. Yaoyorozu."
He offered his hand.
"Pleasure."
Her father shook it.
"Howard has spoken highly of you."
Tony immediately frowned.
"Really?"
Momo's father laughed.
"Frequently."
Tony glanced upward.
"JARVIS, record that."
"Already noted, sir."
Pepper entered behind them.
Tony looked toward Momo again.
"Okay."
The grin appeared.
Momo had learned what that grin meant.
Tony had solved something.
"Ready?"
"For what?"
Tony clapped once.
The laboratory darkened.
A holographic image of Momo's existing hero costume appeared.
Crimson.
Highly exposed.
Designed around one brutal limitation:
Creation required uncovered skin.
Tony walked around the projection.
"Your Quirk converts lipids into molecular structures."
Momo nodded.
"You understand composition mentally, your body handles the conversion, object emerges."
"Yes."
Tony tapped the costume.
"The problem isn't your Quirk."
Momo looked toward him.
"The problem is that every support designer looked at the limitation and designed around it."
Her father crossed his arms.
Tony continued.
"You need skin exposure?"
He highlighted the costume's open sections.
"So they expose skin."
Another hologram appeared.
"Heat problem? Heat-resistant fabric."
Another.
"Need storage? Add belt."
Tony spread his hands.
"Perfectly competent."
Momo waited.
Tony smiled.
"Boring."
Pepper sighed.
"He practiced that."
"I did not."
"You absolutely did."
Tony ignored her.
He looked at Momo.
"I don't want your costume adapting around your Quirk."
Momo stared.
"I want the costume to behave like part of your Quirk."
She stopped breathing for a moment.
Tony turned toward the holographic molecular lattice.
Red hexagonal structures appeared.
Moving.
Separating.
Reforming.
Momo approached.
"What is that?"
Tony smiled.
"Unstable Molecules."
Her father frowned.
"I've heard that name."
Tony nodded.
"You should have."
Another hologram activated.
Howard Stark appeared.
Not a recording.
Live.
Howard was sitting somewhere in New York with a coffee.
"Anthony."
Tony looked up.
"Dad."
Howard looked around.
"Mr. and Mrs. Yaoyorozu. Momo."
Everyone greeted him.
Then Howard noticed Tony.
"You're wearing yesterday's tie."
Tony looked down.
"No I'm not."
"You are."
Pepper looked closer.
"He is."
Tony frowned.
"This meeting has gone off the rails."
Howard smiled.
"Would you like me to explain your project?"
Tony gestured grandly.
"Please save me."
Howard's expression shifted.
The joking faded.
A second hologram appeared beside him.
An old molecular model.
"In my generation, we worked with Franklin Richards Sr. on a theoretical class of adaptive matter."
Momo listened carefully.
"Normal fabric has fixed molecular relationships. Heat changes it. Force changes it. Radiation can break it down."
Howard rotated the model.
"Unstable Molecules were designed differently."
The lattice shifted continuously.
"They don't have one permanent resting configuration."
Momo's eyes widened.
"They can alter their molecular spacing."
Howard nodded.
"Exactly."
Tony stepped in.
"Meaning the fabric doesn't need to tear when your Creation passes through it."
He separated part of the lattice.
A holographic cannon barrel emerged.
The fabric flowed around it.
Then resealed.
Momo moved closer.
"It opens."
"No."
Tony pointed.
"It reconfigures."
That distinction mattered.
He continued.
"Your Quirk begins converting lipids."
The molecular weave responded.
"The suit reads the same biochemical and Quirk-factor signals your skin produces."
The lattice separated smoothly.
"The material changes state around the emerging object."
The cannon emerged fully.
The fabric closed behind it.
No exposed skin.
No tearing.
No obstruction.
Momo stared.
Her mother stared too.
Her father became very quiet.
Tony looked toward Momo.
"You create normally."
He tapped the hologram.
"The suit moves out of the way at a molecular level and comes right back."
Momo whispered:
"Without reducing surface availability."
"Exactly."
Howard smiled.
"Now you're thinking like a Stark."
Tony looked at him.
"She was already thinking like a Yaoyorozu."
Howard paused.
Then smiled faintly.
"Fair correction."
Momo looked toward Tony.
That was subtle.
But she noticed it.
Tony wasn't trying to claim her intelligence.
He wasn't making her his project.
He was solving a technical problem with her.
Her father asked the obvious question.
"How stable?"
Tony's smile disappeared.
He became serious immediately.
"That's the important part."
He enlarged the lattice.
"The old version wasn't."
Howard nodded.
"We shelved it because the molecular state could collapse under contradictory input."
Tony continued.
"Until Reed Richards figured out why."
Momo's eyebrows rose.
"The Richards boy?"
"The deeply annoying Richards boy."
Bruce spoke without looking up.
"You say that because he corrected you."
Tony looked toward him.
"He corrected one decimal."
"It changed the entire result."
"Banner."
Bruce smiled.
Tony returned to Momo.
"Reed realized the fabric needed a biological anchor."
Momo understood before he finished.
"DNA."
Tony pointed at her.
"Exactly."
Her mother stepped forward.
"You're putting our daughter's DNA into her costume?"
Tony immediately shook his head.
"Not storing her genome in the fabric."
That answer mattered too.
"We create an encrypted biomolecular reference signature. Enough for the material to recognize her, not enough to reconstruct her genetic information."
Pepper added:
"And the data never leaves Stark's isolated medical network without Momo's authorization."
Momo's father looked relieved.
Tony continued.
"The suit recognizes your skin chemistry, Quirk activation, temperature, stress response and molecular-conversion pattern."
He smiled.
"Basically, if someone steals it?"
A holographic thief put the suit on.
The material went completely inert.
"Congratulations. They stole an expensive red jumpsuit."
Momo's mother laughed.
Her father smiled.
"What happens if the adaptive system fails?"
Tony nodded.
He'd expected that.
"Fail-safe state is ordinary fabric."
Momo blinked.
"No plasma?"
"No molecular collapse."
"No constriction?"
"No."
"No uncontrolled bonding?"
"Absolutely not."
Tony looked unusually serious.
"I won't put something on another person's body that I wouldn't trust on Pepper."
Pepper looked toward him.
For a second she didn't joke.
Momo's parents noticed.
Tony's bravado was real.
So was the line underneath it.
He took responsibility for what he built.
Her father nodded slowly.
"Show us."
Tony smiled.
"Gladly."
A platform rose from the floor.
On it was the suit from the design Tony and Momo had been refining.
At first glance, Momo recognized herself immediately.
Tony had kept the visual identity.
Deep crimson.
Gold utility belt.
Boots.
High collar.
White and gold details.
But the enormous exposed sections of her original costume were gone.
The new suit covered her completely.
Momo stepped closer.
"It still looks like mine."
Tony nodded.
"That was the point."
She looked at him.
Tony shrugged.
"You asked for a better costume, not a different identity."
That landed harder than he expected.
Momo had been preparing herself for Tony Stark to redesign everything.
To decide his ideas were automatically better.
Instead—
he had listened.
Tony activated the display beside the suit.
YAOYOROZU CREATION SUIT — UMF-01
UNSTABLE MOLECULE FABRIC
Momo ran her fingers across the material.
It felt like fabric.
Soft.
Warm.
Flexible.
Not armor.
Not metal.
Tony watched.
"Try pulling."
She did.
The material stretched.
Then immediately recovered.
"Again."
Momo pulled harder.
Nothing tore.
Bruce finally stood and approached.
"We tested it thermally."
Tony displayed data.
"Fire resistant."
Another.
"Cryogenic resistance."
Another.
"Impact dispersion."
Another.
"Abrasion."
Another.
"Chemical exposure."
Momo looked toward him.
"Ballistics?"
Tony hesitated.
Pepper answered.
"Tony shot it."
Tony pointed at her.
"Testing."
"With a rifle."
"Scientific testing."
Momo's father stared.
Tony immediately clarified:
"Without anyone wearing it."
That did not help as much as he hoped.
Bruce added calmly:
"It passed."
Momo's father relaxed.
Slightly.
Tony opened another display.
"This part is important."
A full-body medical interface appeared.
Lipid reserves.
Blood glucose.
Hydration.
Body temperature.
Creation output.
Fatigue.
Momo's expression changed.
"What is that?"
"Your suit's not just there to let Creation pass through."
Tony pointed.
"It protects you from your actual limitation."
Momo understood immediately.
Her Quirk consumed lipids.
Large creations exhausted her.
Extreme use could leave her weak, dehydrated and unable to produce enough raw material.
Tony highlighted the belt.
"High-density nutrient cartridges."
Momo stared.
"Edible?"
"Unfortunately."
Pepper laughed.
Tony continued.
"Carbohydrates. Lipids. Electrolytes. Emergency glucose."
He opened one cartridge.
"You create too much too quickly, the suit warns you before you collapse."
Momo's mother looked extremely pleased with that.
Tony noticed.
"See?"
He pointed toward her.
"Mom-approved feature."
Maria Yaoyorozu smiled.
"Very much so."
Tony looked at Momo.
"Your Quirk tells everyone what you can create."
He tapped the biometric interface.
"I care about what it costs you."
Momo went quiet.
That sentence changed how she looked at the suit.
It wasn't simply more modest.
It wasn't merely stronger.
Tony had designed around her health.
Around keeping her conscious.
Keeping her functioning.
Making sure she didn't have to choose between using her Quirk effectively and protecting herself.
"Can I try it?"
Tony smiled.
"I was hoping you'd ask."
Several minutes later, Momo stepped from the changing room.
Everyone stopped.
The suit fitted perfectly.
Crimson unstable-molecule fabric covered her from neck to ankle.
Gold belt.
Reinforced boots.
High collar.
Subtle white detailing.
It looked unmistakably like Yaoyorozu.
Just—
finished.
Pepper smiled immediately.
"Oh, that's much better."
Momo looked at herself in the reflective glass.
She moved one arm.
Then another.
No resistance.
Tony examined the telemetry rather than her appearance.
"Comfort?"
"Excellent."
"Temperature?"
"Normal."
"Any itching?"
"No."
"Pressure?"
"None."
Tony nodded.
"Okay."
He moved behind a safety barrier.
Momo frowned.
"Why are you moving?"
"Because you're about to create something, and you have a documented history of creating cannons."
Momo smiled.
"That is fair."
Tony activated sensors.
"Start small."
Momo closed her eyes.
She pictured molecular composition.
Size.
Shape.
Structure.
A metal rod.
Simple.
Creation began.
The suit reacted before anyone except Tony noticed.
Microscopic hexagonal patterns illuminated across Momo's forearm.
The material separated.
Not ripped.
Not opened like a zipper.
It simply flowed away from the formation point.
A silver metal rod emerged from Momo's arm.
The fabric moved around it without touching the forming matter.
The instant the object cleared—
shff.
The suit closed.
Perfectly.
Momo opened her eyes.
Silence.
She looked at her forearm.
Completely covered again.
Her mouth opened slightly.
"It worked."
Tony smiled.
"Of course it worked."
Pepper looked at him.
Tony corrected himself.
"Statistically, it was expected to work."
Momo laughed.
"Again."
Tony raised an eyebrow.
"You sure?"
Momo's entire expression had changed.
The scientific excitement Tony normally wore was suddenly mirrored back at him.
"Again."
Tony grinned.
"Now we're talking."
Momo created a shield.
The fabric flowed.
Sealed.
A sword.
Flowed.
Sealed.
A capture cable.
Flowed.
Sealed.
Then Momo looked toward Tony.
"A cannon?"
Her mother immediately said:
"No."
Tony simultaneously said:
"Yes."
They looked at each other.
Tony reconsidered.
"Small cannon."
Momo laughed.
She concentrated.
The suit opened smoothly across her side.
A cannon barrel emerged.
Her parents stared.
Tony's sensors tracked everything.
No obstruction.
No tearing.
No molecular interference.
No excessive heat.
The cannon completed.
Momo stepped away from it.
The suit immediately returned to its full-coverage state.
Tony looked at the numbers.
"Zero-point-zero-seven percent conversion interference."
Momo's face fell slightly.
Tony looked at her.
"What?"
"It's not zero."
Tony stared.
Then slowly smiled.
Momo realized.
Pepper groaned.
"Oh no."
Tony walked toward her.
"You're bothered by point-zero-seven?"
"Yes."
Tony pointed at her.
"I knew I liked you."
Momo smiled.
"We can improve it."
Tony's grin widened.
"Now you're talking."
An hour later, Mr. and Mrs. Yaoyorozu were having coffee with Pepper while Tony and Momo had completely forgotten that the meeting technically belonged to their parents.
Equations floated everywhere.
Momo corrected a molecular-conversion timing issue.
Tony adjusted the response rate.
Bruce occasionally inserted a comment without leaving his workstation.
Mei Hatsume had somehow attached herself to the project despite nobody officially inviting her.
"BABY!"
Tony looked around.
"What?"
Mei pointed at Momo's suit.
"It's a beautiful baby!"
Momo blinked.
Tony nodded.
"You get used to that."
"I don't think I will."
"Smart."
Pepper watched them.
Momo wasn't shy anymore.
She argued with Tony.
Actually argued.
"No, the response should begin before conversion."
Tony shook his head.
"If you open the lattice early, you reduce protection."
"By milliseconds."
"Milliseconds are how people lose fingers."
Momo paused.
Then nodded.
"Fair."
Tony changed the model.
"What if we use predictive biochemical sensing?"
Momo immediately leaned forward.
"Detect the lipid-conversion precursor."
Tony pointed at her.
"Yes."
She changed another section.
"Then the fabric can pre-stage molecular separation without physically opening."
Tony smiled.
"Exactly."
Howard's hologram watched quietly from the side.
Pepper noticed.
"You're smiling."
Howard looked toward her.
"Am I?"
"Very obviously."
Howard watched Tony and Momo.
"Anthony spent most of his childhood being the smartest kid in every room."
Pepper smiled.
"Still does."
Howard shook his head.
"Not here."
Pepper looked toward Bruce.
Momo.
Mei.
Even Reed Richards, somewhere across the world, occasionally sending Tony corrections that drove him insane.
Howard's voice softened.
"He finally has people who make him work for it."
Pepper looked at Tony.
"And he loves it."
"Yes."
Tony suddenly looked over.
"I can hear both of you."
Howard smiled.
"Good."
Tony rolled his eyes.
Momo tried not to laugh.
After the Yaoyorozu meeting officially ended, Momo's father stopped Tony near the elevator.
"Anthony."
Tony looked over.
The man held out his hand.
Tony shook it.
"Thank you."
Tony shrugged.
"It's a suit."
"No."
Her father looked through the glass toward Momo.
She was still discussing molecular architecture with Bruce.
"You gave my daughter something she should have had from the beginning."
Tony followed his gaze.
"A costume?"
"Choice."
Tony went quiet.
Momo's father continued.
"Her previous costume worked."
Tony nodded.
"But it required her to expose herself because everyone assumed that was simply the price of her Quirk."
Tony's expression changed.
The older man smiled.
"You looked at the same limitation and asked why she should have to pay it."
Tony didn't know what to say to that.
Compliments about intelligence were easy.
Awards were easy.
Articles calling him a prodigy were practically background noise.
This wasn't.
Tony finally shrugged.
"Bad engineering annoys me."
Momo's father smiled knowingly.
"Yes."
He released Tony's hand.
"I'm sure that's all it was."
Tony watched him leave.
Pepper appeared beside him.
"Human."
Tony looked at her.
"What?"
"You're doing the human thing again."
Tony frowned.
"Terrible habit."
Pepper smiled.
Three Floors Below
Nick Fury sat alone.
At least according to Stark Industries security.
Which was exactly how Fury preferred it.
An encrypted S.H.I.E.L.D. interface floated in front of him.
He had watched the Yaoyorozu demonstration.
Not through Stark's private internal systems.
Even Fury knew better than to start that particular war casually.
External observation.
Publicly accessible laboratory telemetry.
S.H.I.E.L.D.'s own sensors.
Enough.
The image froze on Momo's completed suit.
Fury stared at the molecular analysis.
"Unstable Molecules."
He hated that name.
Anything containing the word unstable eventually became his paperwork.
A S.H.I.E.L.D. agent's voice came through his communicator.
"Director?"
"Talk."
"We've detected no external transmission of the manufacturing specifications."
"Good."
"Stark's systems are air-gapped around the project."
Fury raised an eyebrow.
"Kid actually learned something."
"Sir?"
"Nothing."
Fury enlarged the material properties.
Heat resistance.
Extreme elasticity.
Impact distribution.
Adaptive molecular restructuring.
Quirk-responsive behavior.
He stared.
A fabric like that could revolutionize hero equipment.
Medical suits.
Space exploration.
Hazard containment.
Rescue operations.
It could also create adaptive body armor.
Stealth equipment.
Military uniforms.
Assassination gear.
Weapons.
That was always the problem.
Howard Stark had spent half his life learning the same lesson.
Every miracle eventually attracted someone who wanted to put a gun on it.
Fury activated another channel.
"Shadow Protocol."
"Online."
"Flag the term Unstable Molecules across S.H.I.E.L.D. intelligence."
"Global?"
"Global."
"What threat classification?"
Fury thought.
"Don't classify Stark as a threat."
A pause.
"Then what are we watching?"
Fury looked at Tony's image.
Fifteen years old.
Smiling beside Momo.
Obviously thrilled that something he'd built actually helped somebody.
"The people who hear about it."
"Understood."
Fury leaned back.
"And nobody touches Yaoyorozu's medical data."
"Yes, sir."
"Not even us."
Another pause.
"Understood."
Fury ended the connection.
He stared at Tony for another moment.
"Typical Stark."
A faint smile appeared.
"Build something that could change the world before you're old enough to drink."
Then Fury's expression hardened.
His job wasn't stopping Tony Stark from building the future.
It was making sure nobody stole that future and turned it into a weapon.
Stark Tower — 11:48 p.m.
Tony should have been sleeping.
He knew that.
J.A.R.V.I.S. knew that.
Pepper had told him four times.
He was not sleeping.
A holographic model of Momo's finished suit rotated in front of him.
UMF-01
Tony made one tiny adjustment.
"Point-zero-two."
J.A.R.V.I.S. responded.
"Down from point-zero-seven percent Creation interference."
Tony smiled.
"Better."
"Miss Yaoyorozu will be pleased."
"She'll ask for zero."
"Much like someone else I know."
Tony leaned back.
His eyes moved toward another file.
MIDORIYA — POWER DISTRIBUTION
Then another.
BANNER — GAMMA DENSITY REGULATOR
Another.
RESCUE MK-I
Another.
MARK XXIII
Then—
EXTREMIS / VIBRANIUM BIO-INTEGRATION
Tony opened it.
The Arc Reactor model appeared.
His Arc Reactor.
Organic tissue surrounding it.
Nerve pathways.
Blood vessels.
Extremis interface.
Then the theoretical next stage.
Liquid-metal suspension.
Microscopic vibranium particles.
Not molten vibranium.
Not metal dumped into his bloodstream.
A stable molecular suspension engineered specifically for his Extremis physiology.
Tony rotated the model.
Momo's suit had given him another idea.
"JARVIS."
"Yes, sir?"
"Unstable Molecule behavior."
"Loaded."
"What happens if we apply the same biological-anchor principle to the reactor integration medium?"
There was a pause.
A simulation began.
Tony sat forward.
The vibranium suspension approached the Arc Reactor's biological interface.
Instead of forcing Extremis to recognize and contain foreign material—
the material entered already keyed to Tony's biological signature.
Tony's eyes widened.
"Oh."
J.A.R.V.I.S. ran the simulation again.
Failure probability dropped.
Not safe.
Not remotely.
But lower.
"Sir."
Tony didn't answer.
"Sir."
"Yeah?"
"I recognize that expression."
Tony smiled.
"Do you?"
"It generally precedes an expensive and medically questionable project."
Tony enlarged the results.
"Don't tell Pepper."
"I have already informed Miss Potts."
Tony stared upward.
"You're becoming increasingly disloyal."
"Your survival remains my highest priority."
Tony looked back toward the simulation.
Vibranium.
Extremis.
Arc Reactor.
Unstable Molecules.
His own nervous system capable of directly communicating with every technological component.
His blood carrying Arc energy throughout his body.
His nanites using integrated materials to construct the Iron Man armor.
If this worked someday—
he wouldn't merely inject material for the suit.
Extremis could potentially incorporate compatible exotic materials into the entire bio-technological ecosystem.
Reactor first.
Nanite reserve second.
Armor third.
Each upgrade becoming available every time the Mark system formed around him.
Tony whispered:
"Hardware upgrade without surgery."
J.A.R.V.I.S. responded:
"In theory."
Tony smiled.
His favorite two words.
"In theory."
The laboratory door opened.
Pepper stood there wearing pajamas.
Tony froze.
Pepper looked at the hologram.
Then Tony.
Then the hologram again.
"Is that vibranium?"
Tony slowly minimized it.
"No."
"Tony."
"It's mostly diagrams."
Pepper walked toward him.
"Bed."
"Pep—"
"Bed."
Tony sighed.
He stood.
Pepper looked toward Momo's suit design.
Her expression softened.
"You did good today."
Tony looked at it too.
"We did."
Pepper smiled.
"That too."
They walked toward the elevator.
The laboratory lights switched off behind them one by one.
All except the final hologram.
Momo's new suit rotated slowly in the darkness.
Crimson.
Gold.
Fully covered.
Adaptive.
Built not to restrict her Quirk—
but to let her use it without having to compromise herself.
At the bottom of the display sat one final line Tony had added before leaving.
DESIGN PRINCIPLE: THE HERO SHOULD NEVER HAVE TO ADAPT TO BAD EQUIPMENT.
And underneath it:
BUILD AROUND THE PERSON. NOT THE OTHER WAY AROUND.
For Tony Stark, that wasn't merely how you built a hero suit.
It was quickly becoming how he looked at people.
Izuku didn't need to stop using One For All.
He needed a better way to survive it.
Bruce didn't need to stop being Hulk.
He needed a world built to accommodate him.
Momo didn't need to expose herself for Creation.
She needed equipment capable of keeping up.
Tony stepped into the elevator beside Pepper.
His reactor hummed quietly beneath his shirt.
Thump.
Hum.
Every problem had an answer.
You just had to stop accepting the first one.