"Claws Beneath the Steel"

She did not remember her birth name.

When the metal doors slid open for the first time, rumbling like distant thunder, she thought she had died, or perhaps fallen into a cold world beneath the earth. She was thirteen but, at the Facility, age was measured not in years but in scars and the shine of fresh bruises.

A dozen faces stared back at her from the gloom. Students, they called themselves, though none looked eager for learning. They hunched in corners, studied their knees, or sat stiff with wary glances. Kimura, standing behind her in the corridor, gave her a sharp push at the spine. “Inside, X-23.”

And so she was named.

Kimura was unlike anyone she’d known—tall as iron scaffolding, with ice in her eyes and a mouth that rarely smiled. On the first day, Kimura grabbed the back of X-23’s neck, pinched so hard her vision blurred, and marched her to Training Room D. There, the world changed: steel walls, rubber mats washed in the stink of sweat, and rows of shining weapons gleamed—knives, batons, whips, shackles for restraint and punishment.

“Strip,” Kimura ordered.

The words burned in X-23’s ears. She hesitated, trembling, but Kimura’s slap was a whip-crack—her palm left a red mask on X-23’s cheek. Stripping, she folded trembling arms over her narrow chest, feeling the invisible eyes crawling over pale, mutant flesh.

“You’ll learn pain,” Kimura said. “It makes you strong. Show me your claws.”

She didn't want to show—she hated what they were, the silver arcs under her skin, the way her hands ached. But Kimura’s hand closed on her wrist, squeezing until her claws popped out with a wet snickt. The pain pulsed into her bones; Kimura sneered. “Good. You’ll need these.”

The training began before dawn, before breakfast—if there was any breakfast. Kimura dropped her into a room filled with holographic assailants. When she stumbled, Kimura activated real shocks, pain arcing into her muscles until she curled up, gasping. Kimura shouted, “On your feet! The world will never wait!”

Sometimes, Kimura locked X-23 in the soundproof cell. With a click, the lights faded to deep, smothering black. The walls squeezed inward—a mechanical trick to simulate crushing force. X-23 couldn’t move but she screamed, desperate, writhing against the panic. Kimura watched from outside, her lips pursed in faint amusement. “Tell me, X-23, are you afraid yet?”

She was always afraid. At night, she shivered beneath a thin, tattered blanket. The other mutants ignored her; some watched with sideways sympathy, but none dared intervene. Kimura had made it clear: interference meant double punishment. Sometimes she could hear the others weeping softly, and she wondered if her own tears sounded the same.

She learned to fight because Kimura made her fight. Every mistake earned a bruise; every failure drew Kimura’s attention. After a failed drill, Kimura dragged her to the shower room, slammed her against the tile, and pressed a knife to her throat. The blade left a faint, stinging line. “You are not a child. You are a weapon—learn it.”

The Facility was cold, tiled in gray, humming with distant alarms. She lived for the rare rays of sunlight that sometimes slipped through barred windows. Those mornings, she stood near the glass, feeling warmth trickle over her hands, reminding her that outside the Facility existed trees, and birds, and laughter she hadn’t yet learned.

But Kimura made sure those moments were brief.

During hand-to-hand drills, Kimura used her size and strength ruthlessly, grabbing X-23 by an ankle, slamming her into the ground until she gasped, stars bursting behind her eyes. Sometimes the pain was bone-deep: chipped teeth, a fractured wrist, her healing factor scraping together broken cells, always reminding her of the difference between human and mutant.

Pain became discipline. Kimura was relentless. In the mess hall, she forced X-23 to sit alone, monitored her food intake, measured her for signs of defiance. Occasionally, Kimura walked up behind her, knuckles pressing into her back, whispering, “Remember that you belong to me. All I have to do is snap.”

She hated Kimura, but her hatred was small, curled up in the hollow of her chest, trembling like a kitten. Some days, after a brutal session, she sat with knees hugged to her chest and stared at her claws—alien, gleaming, impossible. She wondered what it would take to turn them on Kimura. Sometimes, she almost believed she could.

But she was small. She was young. Her body healed faster than she could make sense of the world around her. Kimura was always watching, always ready to hurt her again.

One afternoon, X-23 finished a grueling circuit, outpacing even the oldest mutants, and collapsed, panting. Kimura strode over, boots thudding, and laughed—a harsh, metallic sound. “See? Pain makes you strong. You want to survive, don’t you, little weapon?”

She stared back, defiant even as blood trickled down her lip. “I want to live,” she whispered.

Kimura’s smile vanished. Her hand flashed out, grabbing X-23’s chin. “Living is for humans. We trained you to kill.”

Yet somewhere, buried beneath the scars and the endless echoes of cruelty, a seed of hope took root. X-23 began to watch. She learned Kimura’s routines, paid attention to the moments when her guard dropped, when her rage gave way to tired silence. In these moments, X-23’s resolve grew. She would be more than a weapon. She would be more than Kimura’s victim.

But for now, she trained. She endured the bruises, the knives, and the words like poison. Each drill was another battle against the future they carved for her.

She did not remember her birth name. But in the darkness of the Facility, she remembered her own beating heart, the marrow-deep defiance that not even Kimura could break.

This story was generated by user vivi.lex with assistance by one of OpenAI’s large-scale language-generation model; prompts used to help generate the story are shown below.

Images were generated with OpenAI's AI system, DALL·E 2, or uploaded by the user.

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