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The Iron Sister's Wrath

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Abigail 'Gail' Carbonell-Stark, 51, hadn't known she was the sister of Tony Stark till the fiasco of New York. He hides her identity from the public but comes to term to having a big sister. Even hiding it from the Avengers. Gail is there in the aftermath of Aliens, Gods, Sokovia and even the Civil War. Coming to hate Steve Rogers after finding her half dying brother in the bunk of Siberia, she builds her own Iron Man suit with FRIDAYs (Tonys AI) help. "The Black Teeth", is a nanosuit for mostly attack and defending. Waiting for Thanos, she helps her brother where she can, even accept half the Asgardian Population and one king and one princes into their home. Loki, over 4 millenial, comes to term with being a Jötunn, while helping Thor finding a place for their people and trying to find help on earth to fight against Thanos with the help of Man of Iron, not accounting for the sister no one had known about and who gives everyone a run for their money.

Chapter 1: The Asgardian Arrival

The helipad of Stark Tower wasn't designed for gods. It was meant for corporate helicopters and Tony’s late-night joyrides. Now, under a bruised purple twilight, the reinforced steel creaked under a weight it had never been meant to bear.The air tore open.

It wasn't a sound; it was a feeling, a pressure in the teeth and a sudden, sharp smell of ozone and burnt cinnamon. Light, jagged and white, splintered down from a cloudless sky, followed by the deafening crack of reality breaking. When it faded, two figures stood amidst the scuffed concrete.

Thor Odinson looked like a king who had lost his kingdom, which was exactly what he was.His armor was scarred, his red cloak frayed at the edges. The legendary blonde hair was lank, the beard matted. In his 1,500 years, he carried the weariness of the last five in the slump of his massive shoulders. His blue eyes, usually bright with thunder, were the colour of a shallow sea.

Beside him, a study in contrast, stood his brother. Loki’s green and gold armor was pristine, his posture perfectly erect. Black hair slicked back, hands clasped calmly behind him, he might have been arriving for a state function, not a desperate asylum plea. Only his eyes, darting across the roof’s perimeter, gave away the calculation beneath the calm.A third figure had been waiting. She hadn’t flinched at the bifrost. She stood with her arms crossed, her feet planted in a practical stance. The wind whipped at her sleeves but didn’t touch the severe bun of her graying dark hair.

“You’re late,” Gail Stark said, her voice carrying over the city’s distant hum. It was a raspy thing, weathered by years of shouting over machine shops and, more recently, battle comms.Thor managed a tired smile.“Lady Gail. Your home continues to defy expectation.”

“It’s a roof, Thor. Welcome back.” Her gaze slid past him, locking onto Loki. “Him too, huh?”

“He is under my protection,” Thor said, the words heavy with finality.

“Noted.” Gail’s sharp brown eyes didn’t leave Loki’s face.“Try anything. See what happens.”

A slow, appreciative smile spread across Loki’s lips.“Madame Stark.Or is it Carbonell? The nomenclature is so delightfully tangled. My brother failed to mention your… formidable presence.”

“He failed to mention a lot of things.” She finally uncrossed her arms, gesturing toward the roof access door. “You’re both tracking alien dirt on my clean deck.Move it inside. We’ve got refugees to situate and a world that’s currently allergic to surprise visitors.”

The common floor of the Tower was too quiet.It felt like a museum exhibit of a past life. Thor’s bulk seemed to shrink the space, his unease palpable as he looked at the empty bar, the spotless counters.“Where are the others?” he asked, his voice too loud in the silence. “The Man of Iron? The Captain?”

Gail was at a control panel, her fingers flying over a holographic interface.“Tony’s in surgery.Again. Compound fracture in his left femur, three cracked ribs, internal bruising that would kill a normal person. He’ll be out in twelve hours, bitching about the pain meds.”

Thor’s brow furrowed. “Surgery?What enemy has he faced?”

“His friends.” Gail turned, her expression flat. “There was a disagreement.A family spat. It got physical.”

“Rogers.” Loki supplied the name with a delighted purr, moving to examine a decanter of Scotch.“The righteous Captain. Do tell.”

“Steve Rogers,” Gail said, the name tasting of acid on her tongue, “and his little buddy Barnes decided the Accords were beneath them.They fought. Tony tried to stop them. They left him in a frozen hydra base with a crushed arc reactor and a hole in his chest.” Her voice didn’t waver. She stated it as fact, but the controlled fury behind it vibrated in the air.“So, the Avengers are currently a non-entity. The Rogue Avengers are international fugitives. And I am the one who answers the door.”

The information landed on Thor like a physical blow. He staggered back a step, his hand groping for the back of a sofa to steady himself.“They fractured?While Asgard burned? While the Nine Realms descended into chaos?” A deep, ragged grief tore through his voice.“My people… half are dead. Slaughtered before my eyes. I come seeking the mightiest warriors of Midgard to stand against the coming storm, and I find you… broken.”

For the first time, Gail’s stern mask softened, but only at the edges. She saw not a god, but a man carrying too many ghosts.“I know,” she said, quieter.“Tony told me.About the ship. About Thanos.” She walked to the bar, not pouring a drink, but just leaning against it.“Your people who made it are safe.We’ve secured a facility upstate. It’s not the Golden City, but it has beds, food, walls. They’re scared, Thor.But they’re alive.”

Thor nodded, a jerky, exhausted motion. “I must see them.”

“Tomorrow. You look like hell, and they need to see their king strong, not shattered.” Her practicality was a kind of mercy. She looked past Thor to Loki, who was now sipping Tony’s sixty-year-old Scotch, watching the exchange with detached interest.“You. Bed.Down the hall. Don’t wander.”

Loki raised his glass in a mocking salute. “Your hospitality is as warming as your demeanor.”

“My ‘demeanor’ is the only thing keeping S.H.I.E.L.D.’s half-dozen sniper teams from painting this building with your brain matter.Remember that.” She tapped a command into her wrist. The nanites stored there shimmered for a second, a silent reminder of the power coiled under her skin. “FRIDAY will monitor. Try to phase through a wall, you’ll get a nasty shock.”

Loki’s eyes glittered with genuine curiosity now, not just mockery. “A mortal woman, armed with her brother’s toys, holding a god hostage. How the mighty have fallen.”

“We’re all just people, Loki. Some of us just hide it better.” She pushed off the bar.“Thor, your room’s the same.Get some sleep. We’ll talk strategy when Tony’s coherent.”

She moved to leave, a small, stocky figure of unyielding resolve in a room full of shattered mythologies.

“Gail,” Thor’s voice stopped her at the door.He looked lost.“Thank you.For my people. For… this.”

She didn’t turn, just gave a short nod. “You brought the war to our door. The least we can do is answer it.”

As the door hissed shut behind her, the brothers were alone in the silence.Loki took another sip, savoring it. “She hates me.”

“She does not know you,” Thor sighed, sinking onto the sofa, the leather groaning under his weight.“Oh, she knows enough. She sees the monster in the fairy tale.I rather like it.” He swirled the amber liquid.“She’s angry. At Rogers.At the world.It’s a pure, hot flame. Not like your simpering mortals with their fleeting passions. This one… she’s been burning for a long time.”

Thor looked at his brother, really looked at him.Past the smirk, past the lies. He saw the exhaustion there, too, a different kind—the weariness of a thousand schemes, all gone to ash.“You will not touch that flame, Loki. You will not manipulate her, or use her, or bring your chaos into this house. They are all that stands between us and oblivion.”

Loki placed the glass down with a precise click.“You have my word, brother. I shall be the soul of propriety.” His green eyes drifted to the door Gail had exited through. “After all, the most interesting games require patience.” A slow smile, devoid of its usual malice, touched his lips. “And she is the most interesting thing I’ve seen on this primitive rock in centuries.”

Outside, on the roof, Gail stood in the wind, the city’s neon glow reflecting in her eyes.She wasn’t watching the sky. She was watching the security feeds on her retina display, the ones showing the two alien princes in her brother’s broken home. One a storm of grief, the other a pool of silent, cunning ink.

And out there, somewhere in the dark between stars, something was coming. Something that had already killed half of Thor’s people. She clenched her fist, and the black and silver nanosuit flowed over her knuckles like liquid shadow, forming sharp, articulated plates before melting back into her skin.

Let it come, she thought, the old, simmering rage in her chest finding a new, cold focus. We’re already broken. We’ve got nothing left to lose.

The chill of the roof did nothing to douse the fire in her chest. Gail let the wind bite at her for another minute, then turned and went inside, the door sealing behind her with a pressurized hiss.

The medical bay was on the sixty-third floor, a sterile, silent world of soft lights and quieter machines. Tony lay in the central pod, his face pale against the white sheets, eyes closed. A bank of monitors beeped a slow, steady rhythm. The docs had rebuilt the femur with a reinforced polymer sleeve, knit the ribs with sonic welders. The internal bleeding was stopped. He was just sleeping it off now, a cocktail of nanite-assisted healers and old-fashioned drugs doing their work.

She pressed her palm against the cool glass partition. “Stubborn ass,” she muttered, her breath fogging the surface.

Her wrist comm buzzed. A holographic screen flickered to life in her periphery. A supply chain summary for the clean energy division. A legal query about the Accords compliance from the Berlin office. A reminder that the board expected a quarterly report in forty-eight hours, injuries and alien refugees notwithstanding.

“FRIDAY, prioritize. Legal to my terminal, supply chain to Rodriguez, and tell the board my report will be delivered when I’m damn well ready, and it’ll likely include a line item for ‘asylum for extraterrestrial monarchs.’”

“Noted, big-boss. Incoming call from Ms. Potts. She’s insistent.”

Gail’s jaw tightened. “Of course she is. Patch her through to the lounge. Audio only.”

She walked into the adjacent room, a small space with a couch and a kettle. She didn’t sit.

“Gail.” Pepper’s voice came through, crisp and professional, but with an undertone of strain that had been there for months.

“Pepper. He’s out of surgery. He’ll live.”

A short, static-filled sigh. “That’s good. I… saw the energy spike on the tower’s telemetry. The bifrost?”

“The God of Thunder and the God of Trouble. They’ve moved in. We’ve got about three hundred Asgardian refugees setting up camp in the old compound upstate.”

The line was quiet for a beat too long. “You didn’t consult with legal. Or with the board.”

“There wasn’t time. A spaceship full of survivors doesn’t exactly make an appointment.”

“Gail, you can’t just… annex a population! The sovereignty issues, the immigration status, the public reaction—”

“The public reaction is the least of my concerns. Half these people watched their families get butchered. They’re not asking for green cards, Pepper. They’re asking for a place to breathe that isn’t vacuum.” Gail pinched the bridge of her nose. “Look, I’m handling it. Stark Industries is handling it. You resigned, remember? To ‘pursue other opportunities.’ So let me pursue this one.”

“Tony is still the majority shareholder. His assets are—”

“His assets are currently unconscious, and I have medical and legal power of attorney. A fact you helped put in place. So, with respect, back off.” The words were cold, precise. The rift between Pepper and Tony after their breakup hadn’t been messy, just… complete. A swift, surgical severance. Pepper had moved on, focused on her own ventures. She’d sent a fruit basket when Tony was brought back from Siberia. Gail had thrown it in the incinerator.

“You’re isolating him, Gail. You’re turning this tower into a fortress and cutting everyone out.”

“Everyone left him in a Siberian bunker to die,” Gail said, her voice dropping to a low, dangerous register. “You left him long before that. So don’t talk to me about isolation. I’m building a wall to keep the wolves out. You’re on the other side of it. Call’s over.”

She killed the connection without waiting for a reply. The silence in the lounge was immediate and thick.

She was pouring hot water over a bag of green tea when the soft pad of footsteps announced another presence. She didn’t need to turn. The sheer size of the quiet was a giveaway.

“The Man of Iron,” Thor’s voice rumbled, filled with a gentle concern. “He will recover fully?”

“He’ll be pissy about the physical therapy, but yeah.” She turned, leaning against the counter. Thor looked less like a force of nature now, just a very large, very tired man in borrowed sweatpants and a too-tight Stark Industries t-shirt. “Couldn’t sleep?”

“Sleep is… elusive. My mind is a chariot pulled by too many ghosts.” He stepped into the room, his gaze taking in the humble space. “This quarrel among your warriors. This ‘Civil War.’ My brother delights in the fracturing, but I do not understand it. They fought together. They were a shield for this world. What could break such a bond?”

Gail blew on her tea. Where to even start? “A document. The Sokovia Accords. Oversight. Rules. After Ultron, after Lagos… the world governments wanted a leash. Tony agreed. Steve didn’t.”

“The Captain refused to be governed?” Thor asked, his brow furrowed.

“He refused to compromise. He said the safest hands were still their own.” A bitter smirk touched her lips. “Then his old war buddy, Bucky Barnes, got implicated in a bombing. Steve went rogue to protect him. Tony went to bring him in peacefully. It went to hell.” She took a sip, the tea scalding her tongue. “They fought at an airport. Like children. Then Steve and Barnes went to Siberia to stop the other Winter Soldiers. Tony followed, trying to help. He found out Barnes killed our parents. And Steve… Steve knew. He’d known for years.”

Thor’s face underwent a profound change. The confusion melted into a dawning, horrified understanding. It was an expression she knew—the moment a myth becomes a painful, personal reality.

“He hid this truth? From his shield-brother? From the son?” Thor’s voice was a whisper of thunder.

“Yeah.”

“And when the truth emerged?”

“Steve chose Barnes. He beat Tony with his own shield. Left him there. If his suit hadn’t had a crawl-mode and a distress signal, he’d have frozen to death.” She set her mug down with a sharp click. “So that’s your fractured might of Midgard. One side are fugitives. The other side is just… gone. And Tony’s in there putting himself back together, piece by piece.”

Thor was silent for a long time, staring at the floor. The weight of it seemed to settle on him, a new kind of gravity. “On Asgard, such a betrayal would be settled in the holmgang. A fight to the death for honor.”

“We don’t do that here. We just… live with it. The betrayal doesn’t die. You just carry it.” She looked at him, saw the reflection of his own losses in his eyes. “Now you know why the welcome mat’s looking a little threadbare. We’re not the army you remember.”

He met her gaze, and to her surprise, he gave a slow, solemn nod. “No. You are not. You are battle-wounded. You understand the cost. That is what I need now. Not blind heroes. But those who know the price.” He straightened his shoulders, a fragment of the old king returning. “When he wakes, tell him the Son of Odinson stands with the House of Stark. For shelter. For vengeance. Whatever comes.”

He left her then, moving with a quieter grace. Gail picked up her tea, but it had gone cold. She stood in the humming silence, caught between the quiet beep of the med-bay monitors, the scrolling legal text on her unseen displays, and the ghost of a thunder god’s oath.

The wall was built. The wolves were circling. And somewhere in the deep black, Thanos was smiling.

Her wrist comm buzzed again. FRIDAY’s voice, calm. “Big-boss, Boss’s neural activity is spiking. He’s entering a conscious state.”

Gail abandoned the mug. She was already moving, the cold tea forgotten, everything else narrowing to a single point of light in a sterile room. He was waking up.

He was waking up.

The light was the first thing—a soft, clinical white that seeped through his eyelids. Then came the sound: the low, rhythmic beep of a cardiac monitor, a familiar, metallic song. Smell: antiseptic, the sterile tang of recycled air, and underneath it all, the faint, copper scent of his own blood.

Tony Stark opened his eyes.The world was a blur of off-white ceilings and gentle, diffused lighting. He tried to move his head, and a wave of nauseating pain radiated from his left leg, bundled in a sophisticated medical scaffold, up through his ribs, settling as a deep, throbbing ache in the center of his chest.He groaned.

A shape moved into his field of view, blurry at first, then resolving into a familiar, stern face framed by graying hair. Gail leaned over the bed, her brown eyes scanning his.

“Hey, sleeping beauty,” she said, her voice low.“Don’t try to sit up. You’re held together with synthetic polymers and prayer.”

Tony’s throat was desert-dry.He managed a croak. “What… hit me?Tall guy… vibranium shield… moral superiority.”

“Rogers and Barnes. Then a ceiling.Then the floor.” Her words were clipped, factual. She held a cup with a bent straw to his lips.The water was cool, almost painful in its goodness. He drank greedily.“Pepper?” he rasped, sinking back.“Not here. You’re stuck with me.” There was no accusation in it, just a dry statement. “Your brainchild FRIDAY is running the morphine drip. Say hello.”

“Welcome back, Boss,” FRIDAY’s voice murmured from a nearby speaker, softer than usual.

Tony’s eyes, now more focused, scanned the room.It was the Tower’s med-bay. But it felt different.Empty.“The team?”

“Gone.Fugitives. Or retired.” Gail pulled up a stool and sat, her posture rigid.“Ross wants you in a debrief. I told him to get in line behind your orthopedic surgeon.”

A memory, sharp and jagged, cut through the fog: Siberia.The cold.The shield coming down.The silence after. He closed his eyes for a second.“Rhodey?”

“In D.C.Walking.Pissed. He’s good.” She reached out and adjusted a sensor pad on his arm, her touch surprisingly gentle. “We have… guests.”

Tony opened his eyes, a flicker of his old curiosity cutting through the pain.“Guests.”

“Point Break came home. Brought his brother and a few hundred refugees.Their planet’s gone. Something about a big, purple intergalactic asshole named Thanos.”

The information landed, piece by heavy piece.Thor.Loki.Asgardians. Thanos.It was too much.The weight of it pressed down on his aching ribs. He’d fought his friends for this? To be lying broken when the real war knocked on the door?“Are they…?”

“In the building. Thor’s been pacing holes in the common room carpet.Loki’s been suspiciously quiet, which is never good. I put the refugees in the old compound.It’s secure.”

Tony let out a long, shaky breath. The emotional calculus was overwhelming—betrayal, loss, and now this.A cosmic debt called due. “I need a suit.”

“You need a nap. And then about six months of physical therapy.” Gail stood, turning to check a readout on a holographic screen. “The world’s not ending today. It’s just… rearranging itself uncomfortably.”

“Gail.” Her name was a rasp.She turned back. He saw it then, the fierce, protective fury in her eyes, the same look she’d had when she pulled his broken body from the Iron Man armor in that Siberian bunker. She’d built the Black Teeth suit in three weeks of sleepless, silent rage.“Thank you.”

She looked away, her jaw working. “Don’t.Just get better.The bill’s coming, Tony.For all of it. And we’re gonna need you standing when it arrives.”

He nodded, the movement sending a fresh spike of pain through his skull.He was awake.The comfortable numbness was gone. Every hurt, every failure, every looming threat was now vividly, painfully present.

From somewhere in the Tower, a deep, reverberating boom echoed, like distant thunder testing its strength.Thor.The god was here. The trickster was here.The war was here.

Tony Stark looked at the ceiling, at the clean, white tiles, and for the first time, he didn’t see a finish line. He saw a starting gate.

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