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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 3: The Vigil's Cracks

The workshop was never truly dark. Even at three in the morning, standby LEDs glowed like distant red stars, and the holographic emitters gave the air a faint, ethereal shimmer. It smelled of overheated circuits, bitter coffee, and the sharp, clean scent of nanite lubricant.

Gail stood at the central worktable, her shoulders hunched like a bird of prey over a kill. The holographic schematic of the Black Teeth suit revolved slowly in front of her, a complex weave of energy pathways and structural load points. Her fingers, stained dark with coolant and a smudge of carbon, danced through the light, tweaking tolerances on the chest plate dispersion matrix. A half-drunk mug of coffee sat cold beside her, a skin forming on its surface.

She didn’t need to look at the data stream FRIDAY was subtly projecting in her peripheral vision. She could feel the exhaustion in the fine tremor of her hands, in the gritty ache behind her eyes. Every time she blinked, the afterimage wasn’t of schematics, but of snow. Endless Siberian snow, and Tony’s shattered helmet, and the twisted, brutalist architecture of the bunker where she’d found him barely breathing. The memory had a physical weight. It sat on her sternum, making each breath an effort.

“Big-boss, your cortisol levels are at a sustained peak indicative of chronic sleep deprivation. Your fine motor precision has degraded by eighteen percent in the last hour,” FRIDAY’s voice murmured from the ceiling, calm and inexorable. “A four-hour sleep cycle is strongly recommended.”

“Log it and mute health alerts for thirty minutes,” Gail said, her voice rough from disuse. She didn’t look up. The dispersion matrix wasn’t right. It could handle directed energy, but the claw-crush she’d used on the crawler’s core had transmitted a feedback shock through the suit’s neural interface. A tiny spike. Unacceptable.

She was so immersed in the flaw, in chasing the phantom tremor in the code, that the presence at the edge of the light didn’t register immediately. It was only when a shadow fell across the hologram, long and slender, that her head snapped up.

Loki leaned against the frame of the secondary tool bay, arms crossed. He was dressed in simple, dark clothes again, but he’d forgone the sweater for a tunic that was unmistakably Asgardian in its weave. He’d been watching. For how long, she couldn’t tell. His expression was unreadable, stripped of its usual theatrical irony.

“The silent guardian, toiling in the witching hour,” he said. His voice was softer than she’d ever heard it, barely a ripple in the hum of the workshop. “You eviscerate my brother’s enemies by day and haunt your own machines by night. A relentless cycle.”

Gail stared at him, her brain slowly switching tracks from engineering to threat assessment. “Do you need something? A bedtime story? A map to the kitchen you keep phasing into?”

He ignored the jab. His green eyes traced the lines of fatigue on her face, the tense set of her jaw. “You are burning the core of yourself to keep him warm,” he observed, not with judgment, but with a clinical detachment that was somehow more intrusive. “The flesh is not steel. It will fatigue. It will break. It is not sustainable.”

A cold spike of anger cut through her fatigue. “My sustainability is my business. Go analyze someone else’s cortisol levels.” She turned back to the hologram, her fingers stabbing at a virtual control to rotate the schematic violently.

She heard the soft scuff of his boots on the polished floor. He moved with a preternatural quiet. He stopped on the opposite side of the worktable, the blue light from the hologram casting sharp shadows under his cheekbones. He didn’t speak. He simply reached out and placed a tall glass of water on the table next to her cold coffee. Condensation beaded on its surface.

“Hydration is a poor substitute for rest, but it is a start,” he said.

Gail looked from the water to his face. The offer, the simple act, was so wildly out of character it short-circuited her suspicion. “What’s the angle?”

One corner of his mouth quirked upward, but it wasn’t his usual smug smile. It was thinner, more rueful. “The angle, dear lady, is one of pragmatic self-interest. This tower is currently the most defensible point on this continent. Its primary defender is you. If you collapse from systemic exhaustion, my temporary sanctuary becomes considerably less secure.” He gestured to the schematics. “You are optimizing a weapon. I am merely suggesting you not allow the wielder to rust.”

She didn’t touch the water. “I’ll sleep when he’s safe.”

“And when will that be?” Loki asked, his head tilting. “When the Titan is dust? When every potential threat in the cosmos is extinguished? You are chasing an horizon that recedes. Stark will never be ‘safe.’ Not as he is. Not as you are.” He let the words hang. They weren’t cruel. They were just true, and they echoed the fear that lived in her marrow.

Gail’s throat tightened. She looked away, her gaze catching on the half-assembled exo-frame in the corner—Tony’s next project, forever paused. “So what’s your suggestion? I take a spa day while the world ends?”

“My suggestion,” Loki said, leaning forward slightly, his hands resting on the table’s edge, “is that you accept an ally. Even a… self-interested one.”

She barked a laugh, a dry, cracking sound. “You. You’re volunteering to be my ally.”

“I am volunteering to ensure the integrity of this fortress,” he corrected smoothly. “My brother’s vow ties him to Stark. My… continued existence appears, unfortunately, tied to my brother’s. Therefore, Stark’s well-being is a component of my own.” He met her skeptical gaze. “And you are the cornerstone of Stark’s well-being. I saw the footage from the forest. That was not a soldier following orders. That was a foundation, holding.”

The terminology got through her defenses where sympathy would have failed. Foundation. Cornerstone. She was an engineer. She understood load-bearing structures. She’d spent a lifetime being one for other people.

“You want to help,” she said, flatly.

“I want to contribute to the structural integrity of our mutual, if odious, refuge.” He gestured to the sprawling workshop, the glow of dormant servers, the silent suits on their racks. “You are a genius with machines and mortality. I am adept with… less tangible forces. Illusions. Perceptions. The weaving of secrets. Your cameras see probes. Perhaps I can help ensure they see nothing at all.”

Gail finally picked up the glass of water. It was cold in her hand. She took a sip, the water shocking her system. “A magical security system. Because your last stint on Earth was so subtle.”

“Last time, I wished to be seen,” he said, and for a fleeting moment, something raw and old flickered in his eyes. “Now, I find the concept of being entirely unseen has its appeal. For all of us.”

She studied him. The god of lies, offering a truth. It was probably just another layered deception. But the exhaustion was a vast, sucking tide. The idea of sharing the weight, even with this treacherous, sharp-edged creature, was a temptation that vibrated in her bones.

“No mind control,” she said, her voice firm. “No manifesting dragons in Central Park. No contact with any external entities without my explicit clearance. And you run everything through FRIDAY. She logs it all.”

Loki placed a hand over his heart, a gesture so obviously false it circled back to seeming genuine. “A pristine set of parameters. I shall be a phantom, a whisper in the wiring.”

“You’ll be on a very short, very monitored leash,” she corrected. She set the glass down. “Start with the perimeter. FRIDAY’s sensors are top-tier, but they’re physical. If you can layer in something… esoteric to mask the Asgardian life-signs from any more deep-space scans, do it. Report the methodology to FRIDAY in excruciating detail.”

He inclined his head. “As you command, big-boss.” He said the title with a subtle, rolling inflection that made it sound both mocking and respectful.

He began to turn, then paused. “The water. Finish it. Then, if you cannot sleep, at least sit. A collapsing foundation benefits no one.”

He glided away, merging back into the shadows of the workshop without a sound. Gail stood still, the hum of the machines once again the loudest thing in the room. She looked at the hologram, the flawed matrix suddenly seeming less critical. She looked at the exo-frame, a ghost of Tony’s future.

With a long, shuddering exhale, she pulled a stool over and sat. She picked up the glass and drained it. The simple act felt like a surrender, and a beginning.

At the room’s entrance, hidden from her view, Loki lingered. He watched the rigid line of her back finally soften, just a fraction. He had spoken a truth: his survival was linked to this place. But as he felt the subtle, spatial shift of his own magic beginning to weave a cloak of misdirection around the tower’s upper floors, he recognized a more disquieting truth. For the first time in centuries, he was not building a lie for conquest, or for escape, but for preservation. The purpose was foreign. The texture of it, unfamiliar. He glanced once more at the woman sitting in the pool of blue light, then let the shadows take him, already composing the first layered verse of a hiding spell in his mind. The game had changed. The board was smaller, and the pieces, for now, were curiously aligned.

The board was smaller, and the pieces, for now, were curiously aligned. Loki found the work curiously quiet. His magic, usually a weapon or a grand deception, flowed from his fingertips as a fine, invisible mist. It was subtle work, weaving layers of misdirection and dampening fields into the very architecture of the tower’s upper floors, a psychic static to blur the bright signature of Asgardian souls from any deep-space scan. FRIDAY monitored it all, her sensors translating the arcane into terabytes of cold data. He found a strange satisfaction in the collaboration, in the silent, precise integration of his chaos into her order.

Gail did not sleep. She sat on the stool until the tremor left her hands, then she moved. The workshop’s chaos called to her, but a heavier pull drew her upwards, to the med-bay. The hallways were too quiet. Her boots were loud on the polished floor. She pushed the door open and the hum of the scaffold greeted her, a sound that was now the baseline of her world.

Tony was awake. The blue cage of light around his leg was dimmed to a low pulse. He was propped up, a tablet resting on his chest, its glow painting his face in pallid shades. He looked older in the half-dark. He watched her enter, his eyes tracking her as she pulled a chair close and sat with a weary sigh.

“You don’t look so swell,” he said, his voice a gravelly parody of its usual cadence. He attempted a smirk. It was a jest, a word Rogers had used from the 40s, a clumsy piece of nostalgia that felt like sandpaper on a fresh wound.

Gail’s hand, which had been reaching to adjust his blanket, stilled. She picked up a discarded stylus from the side table instead. It was a cheap, plastic thing. She stared at it, her fingers tightening. The plastic casing gave a sharp, warning crack. A hairline fracture appeared along its length.

Tony saw it. He saw the white-knuckle grip, the way her eyes fixed on nothing. “Gail.”

“Don’t,” she said, her voice low and final.

“We have to talk about it sometime. Siberia.” The word hung between them, cold and vast.

“No, we don’t.” She wouldn’t look at him. She focused on the cracked pen, on the small, contained destruction in her hand. “It’s done. You’re here. I’m here. We move forward. That’s the only conversation.”

“It’s not done.” Tony pushed the tablet aside, wincing as he shifted. “It’s in this room. It’s in that suit you built. It’s in the way you haven’t slept for three days. You’re building a fortress, Gailsy, but you’re locking yourself inside it with the bad memories.”

“What do you want me to say?” Her head snapped up, her eyes blazing in the dim light. “You want the details? The temperature? The scent of blood and snow? I have them. I have a perfect, high-definition memory of it. My brain is a goddamn black box from that flight. Playing on a loop.”

“Then talk to me! Scream at me! Something!” Tony’s voice rose, frustration cutting through his own pain. “You just… fix. You fix the suit, you fix the security, you fix me. But you don’t talk. You just carry it. And I can’t watch you carry it alone anymore.”

“I’m not alone. I have a job.” The stylus snapped completely now, the two pieces falling from her fingers to clatter on the floor. “My job is to make sure it never happens again. That no one gets close enough to do that to you. Not Rogers, not some alien scavenger, no one.”

“That’s not a life, Gail. That’s a siege.”

“It’s the life I choose!” She stood, the chair screeching back. The controlled veneer shattered. “You think I want to talk about it? You think I want to relive finding you in that fucking bunker, half-dead in a broken suit because your friend—your shieldbrother—left you there? He shattered your chest and then he left you there!”

“Steve made a choice—”

“He made the wrong choice!” she screamed. The sound was raw, volcanic, echoing off the med-bay’s sleek surfaces. “He had a hundred choices and he picked the one that ended with you bleeding out on the floor of a weapons graveyard! And you want to talk about it? You want to dissect his reasons? There is no reason good enough!”

Tony was shouting back now, trying to sit up further, the scaffold whining in protest. “You can’t just bury it! It’s poisoning you!”

“I’M NOT POISONED, I’M ANGRY!” She leaned over the bed, her hands gripping the safety rail, her face inches from his. Every ounce of fear, every sleepless hour, every adjustment to the Black Teeth’s dispersion matrix fueled the words. “He almost took you from me! Do you understand that? He almost took you, and he walked away, and he gets to be righteous? He gets a team? He gets to be free?”

Her chest heaved. Tears of pure, undiluted rage stood in her eyes, but they did not fall. “So no, Tony. We are not talking about Siberia. We are building walls so high that nothing from that place, and no one from that place, ever gets near you again. That is the only conversation.”

The door hissed open. Thor filled the doorway, his face a mask of concern and confusion. Loki was a step behind, his expression unreadable, taking in the scene: the shattered stylus, the heaving woman, the stricken man in the medical cage.

The sudden audience slammed a silence over the room. Gail straightened up, wiping a furious hand across her eyes. The vulnerability vanished, sealed away behind a wall of ice. Thor stepped forward, his voice a low rumble. “We heard raised voices. Is there… is there a threat?”

“No threat,” Gail said, her voice now scraped hollow and flat. “Just a disagreement. About home improvement.” She didn’t look at Tony. She looked at Loki, whose gaze held a peculiar, knowing intensity. He saw it all—the foundation, cracking under its own load.

“Gail—” Tony started, his voice drained.

“Get some rest, Tony,” she interrupted, turning her back on all of them. She walked toward the door, past the two gods. “The walls aren’t going to build themselves.”

The silence she left behind was thick enough to choke on. Thor remained in the doorway, his broad shoulders blocking the light from the hall. He looked from Tony’s ashen face to the empty space where Gail had stood. His voice, when he finally spoke, was a careful rumble.

“This ‘Siberia.’ It is the wound that will not close between you.” He stepped fully into the room, his boots silent on the floor. “You speak of it with her, but only in shouts. What happened there, Stark?”

Tony let his head fall back against the pillows. The fight had drained him, leaving a hollow ache that dwarfed the physical pain. He stared at the ceiling, at a faint scuff mark he’d never noticed before.

“We fought. Me, Rogers. Barnes.” He said the names like they were foreign objects in his mouth. “About the Accords. About...our, Gail and my parents.” He closed his eyes. “Rogers shattered the arc reactor in my suit. The old one. The one that kept the shrapnel out. He left me there. Power failing. In the cold.”

He opened his eyes. They were bleak, staring at a memory only half-remembered. “I don’t… I don’t remember after that. Not clearly. Just cold. And the sound of the suit systems dying one by one. Then nothing. Then Gail’s voice.”

Thor absorbed this, his expression grave. He knew battle. He knew betrayal. The clinical description was worse than any epic tale. “She found you.”

“She dug me out.” Tony’s voice was a dry whisper. “I was in the bunker. She had a suit. One of the old, bulk-mark models from the Expo. Jarvis-era. She’d borrowed it, jury-rigged it for excavation. She dug through a mountain to get to me.”

From the ceiling, FRIDAY’s voice emerged, softer than usual, almost hesitant. “Boss… the Mark XVI ‘Bursa’ suit she commandeered had full operational logs. Environmental, audio, biometric. From the entry into the complex to the med-evac.”

Tony’s eyes shifted, focusing on nothing. “You have it.”

“I do.” A pause. “Big-boss expressly forbade me from ever accessing or displaying that data to you. Her standing order is sealed under a highest-level privacy encryption.”

The air in the room grew heavier. Thor frowned, looking between the empty space where the voice originated and Tony’s suddenly intent face. Loki, who had been leaning against the doorframe as if bored, went very still. His eyes sharpened.

“Show me,” Tony said. The words weren’t loud. They were absolute.

“Boss, her orders—”

“Are to protect me.” Tony cut FRIDAY off, his gaze now fixed on a point in the middle of the room. “This isn’t protection. This is a ghost in my own head. Show me.”

Another pause, longer this time. A conflict of protocols. Then, with a faint holographic shimmer, a screen resolved in the air above the foot of Tony’s bed. It was a multi-panel display. On the left, a grainy, jostling first-person view from the Bursa suit’s helmet cam. On the right, scrolling strings of data: internal and external temperature, suit integrity percentages, life-sign readings.

The footage was stark, devoid of drama. It showed the blasted interior of the Hydra bunker, lit by the suit’s work-lights. Snow swirled in through a cracked ceiling. The camera view moved with a pragmatic, relentless pace. It wasn’t searching. It knew where to go.

Then the view rounded a corner. And there it was.

A heap of red and gold metal, crumpled against a console like discarded trash. The iconic armor was caved in, the chest plate a spiderweb of fractures around a dark, empty hole. One arm was bent at a nauseating angle. The helmet was gone.

The camera view hurried forward. The suit’s external audio picked up the sound of Gail’s breathing, sharp and controlled, and the gritty crunch of debris underfoot. A readout on the data panel flashed: LIFE SIGNS DETECTED. CRITICAL. FADING.

The Bursa suit’s bulky arms reached down. Metal gauntlets, designed for lifting heavy stage equipment, began with shocking delicacy to peel back the broken chest plate of the Iron Man armor. The footage was methodical, a mechanical dissection. It revealed the undersuit beneath. It was soaked dark, a deep, unnatural crimson that looked black in the work-lights.

A biometric feed from inside the ruined Iron Man suit spiked on the data panel—a weak, erratic pulse, crashing blood pressure, core temperature plummeting.

The camera view zoomed in. Beneath the shattered armor, Tony’s face was visible. Pale. Blood trickling from his nose and a cut on his temple. His eyes were half-open, unseeing. His lips were blue.

From the speakers, Gail’s voice came through the suit’s internal comms. It was not the voice from the workshop or the med-bay. It was stripped bare, vibrating with a terror so profound it had been hammered into a flat, focused chant.

“Okay. Okay, Tony. I see you. I’ve got you. Don’t you do this. You hear me? You do not get to do this.”

The Bursa suit’s arms slid under him. There was a sickening, wet sound as his body was lifted, a sound of torn fabric and things shifting that shouldn’t shift. A new data stream appeared: the Bursa suit’s load-bearing actuators screamed under the stress, integrity percentages dropping fast.

The footage became a lurching, nightmare journey back through the complex. The camera jolted with every step. Tony’s limp head lolled against the chest plate of the rescue suit. His breath, when it fogged the viewfinder, was agonizingly shallow. Gail kept talking. A steady, desperate stream of words.

“Almost there. I have you. Just hold on. Just… damn you, Stark, you hold on. You do not leave me. You do not get to make me the only one left.”

The data log showed the exact moment the Bursa suit’s left knee actuator failed, forty meters from the exit. The view pitched violently. Gail grunted, a sound of pure strain. The suit didn’t fall. It limped forward, dragging its left leg, the servos shrieking in protest. The external temperature readout hit -42 Celsius.

Then, blinding daylight. Snow. The view scanned a grey sky before focusing on a waiting, modified Stark med-evac VTOL, its engines whining. The last few meters were a frantic scramble. The footage ended as the camera view entered the bay of the aircraft, the data logs terminating with the BURSA SUIT TOTAL STRUCTURAL FAILURE and a single, final biometric ping from Tony: STABLE – CRITICAL.

The hologram winked out.

The med-bay was silent. The only sound was the low, clinical hum of Tony’s support scaffold.

Tony stared at the empty space where the images had been. His face was bloodless. He remembered the cold. He remembered the silence. He had never seen the blue of his own lips. He had never heard the raw, breaking terror in his sister’s voice, a sound she had buried under three years of furious, silent work.

Thor stood as if turned to stone. His hands clenched at his sides. He had seen millennia of battle, had borne his brother’s body. This was different. This was not a warrior falling in glory. This was a murder left unfinished in the dirt. A profound, quiet horror settled in his blue eyes.

Loki pushed himself off the doorframe. He didn’t look at Tony. His gaze was fixed on the spot where the hologram had died, as if he could still see the afterimage. When he spoke, his voice was devoid of its usual melodic sarcasm. It was simple, almost admiring.

“Ah,” he breathed. “There it is.”

Tony finally blinked. He looked at Loki, empty. “There what is?”

“The source code.” Loki’s green eyes flicked to Tony, then toward the hallway where Gail had vanished. “Of her beautiful, magnificent wrath. You wondered why she builds only walls? She is not building walls, Stark.” A faint, cold smile touched his lips. “She is building a tomb. For the man who did that to you. And she will bury him in it, piece by piece, if he ever steps back into her world.”

He gave a slight, thoughtful nod, as if a complex equation had finally been solved. “Now I understand the shape of the foundation. It is not stone. It is vengeance, kept patient on ice.”

Thor found his voice, a low, thunderous growl. “The Captain… he did this? He left you thus?”

Tony didn’t answer. He was still seeing the blue of his lips, hearing the shriek of the failing servos as Gail dragged him out. The ghost in his head had a face now, and a voice, and it was his own.

“FRIDAY,” he said, his voice unnervingly calm. “Save that data. Isolate it. Label it ‘Genesis.’” He looked at Thor, then at the empty doorway. The hollow ache was gone, replaced by something colder, harder, and perfectly clear.

“She’s not the only one building.”

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