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Back in diapers

Fandom: Invincible

Created: 7/7/2026

Tags

Science FictionFantasyDramaAngstHurt/ComfortPsychologicalDarkCharacter StudyDystopiaSpace OperaHuman ExperimentationCurtainfic / Domestic Story
Contents

The Weight of a Thousand Years

The air in the obsidian sanctum was thick with the scent of ozone and ancient parchment. Khaos stood in the center of the room, her small, pale hands clenched into trembling fists. Despite her appearance—that of a ten-year-old girl with snow-white hair and skin the color of milk—her eyes held the weary, jagged edge of a millennium of survival. She was Viltrumite by blood, a survivor of a race that valued nothing but strength, yet she had spent centuries trying to outrun the shadow of her own heritage.

Across from her, Ash moved with a predatory grace that made the shadows of the room seem to recoil. Her raven-black hair trailed behind her like a funeral shroud, and her blood-red eyes hummed with a cruel, rhythmic light. Every time Ash moved, the small red horns protruding from her brow flickered with a faint, crimson glow, signaling the immense, reality-warping power she held over the physical form.

"You’ve been agitated, little one," Ash said, her voice like silk dragged over broken glass. "Your heart rate is spikey, your muscles are coiled. You’re acting like a frightened fledgling rather than a thousand-year-old warrior."

"I am not a child, Ash," Khaos spat, her voice surprisingly deep and resonant for her small frame. "And I am certainly not yours to manage. I want to be left in peace. I have earned my silence."

Ash let out a low, melodic laugh that didn't reach her eyes. She stepped closer, the hem of her pitch-black robes whispering against the stone floor. "Peace is earned through discipline. You lack it lately. You’ve been destructive. You’ve been... messy."

Khaos scoffed, her Viltrumite pride flaring. "I destroyed a mountain range because they dared to build a temple to a god that doesn't exist. It was a chore, nothing more. Now, step aside. I’m going to the gardens."

Before Khaos could take a single step, the air around her thickened. She felt a sudden, sickening lurch in her gut—a sensation of her own biology being rewritten from the inside out. Her knees buckled. This was Ash’s specialty: the manipulation of the flesh. It didn't matter how strong Khaos’s muscles were or how dense her bone structure was; Ash didn't fight the body, she commanded it.

"What are you doing?" Khaos gasped, her voice cracking as a wave of heat washed over her.

"I’m putting you in a time-out," Ash replied calmly. She raised a hand, her black, razor-sharp claws catching the dim light. "You claim to hate the way the Viltrumites treated you, yet you act with their same mindless aggression. If you want to act like a brat, I will ensure you are treated as one."

Khaos tried to fly, to launch herself through the ceiling and into the cold vacuum of space where Ash couldn't follow, but her legs felt like lead. Worse than lead—they felt soft. The intense gaze of Ash’s red eyes locked onto her, and Khaos felt her very autonomy slipping away.

"Stop this!" Khaos screamed, her face flushing a deep pink against her white hair. "I am a thousand years old! I have seen empires rise and fall!"

"And yet, look at you," Ash murmured, closing the distance.

With a flick of Ash’s wrist, Khaos’s clothes—the functional, reinforced armor she favored—simply dissolved into motes of dark energy. Khaos let out a cry of pure indignation, trying to cover herself, but her motor skills were being dampened by Ash’s will. She felt a familiar, humiliating weight being pressed against her hips.

It was thick, crinkly, and white. A diaper.

"No," Khaos hissed, her eyes glowing with a faint, golden light as she tried to tap into her Viltrumite reserves. "I will kill you for this. I will tear your heart out and feed it to the sun."

Ash didn't even flinch. She knelt down, her glowing horns casting long, demonic shadows across Khaos’s pale skin. With practiced, mocking efficiency, she pulled the tabs tight. The sound of the adhesive sticking was deafening in the quiet room.

"You won't do anything of the sort," Ash said, patting the front of the garment. "You’ll sit here, you’ll reflect, and you will learn that power without control is just a tantrum. And tantrums are for babies."

Khaos slumped against the floor, the thick padding between her legs making it impossible to sit comfortably. The humiliation was a physical weight, heavier than any gravity well she had ever escaped. She hated the Viltrumites for their cruelty, but she hated Ash in this moment for her condescension.

"I am not weak," Khaos whispered, her head hanging low so her white bangs hid her eyes.

"Weakness is refusing to acknowledge your place," Ash countered, standing up and smoothing her robes. "You hate being treated like a child, yet you refuse to grow up. You cling to your anger like a security blanket. So, I’ve given you something more appropriate to cling to."

Ash turned her back, the ultimate sign of disrespect to a Viltrumite. She wasn't even afraid of a counterattack. She knew her hold on Khaos’s nervous system was absolute.

"I’ll be back in a few hours," Ash said over her shoulder. "Try not to make a mess. Though, if you do, at least you’re prepared now."

Khaos waited until the heavy obsidian doors groaned shut before she let out a muffled roar of fury. She tried to stand, but her legs gave way, the bulky diaper shifting and crinkling loudly. It was a sound that mocked her history, her age, and her power.

She rolled onto her back, staring up at the vaulted ceiling. She was a daughter of Viltrum. She had survived the Scourge Virus, she had survived the civil wars, and she had survived the vacuum of deep space. But here, in the silence of Ash’s sanctum, she felt smaller than she ever had.

"I’ll kill her," Khaos whispered to the empty room, though the threat lacked its usual bite. "I’ll wait until she’s sleeping, and I’ll..."

She trailed off as she realized her own body was betraying her. The dampening field Ash had placed on her wasn't just physical; it was making her feel sluggish, heavy-eyed, and vulnerable. The very things she hated—weakness, submission, the loss of autonomy—were being forced upon her not through combat, but through the rewriting of her own biology.

Hours passed. Khaos moved from fury to despair, and finally to a cold, simmering resentment. She tried to tear the diaper off, but her fingers felt blunt and clumsy, her sharp Viltrumite nails unable to catch the edges of the reinforced material. Ash had designed this specifically for her strength.

When the doors finally slid open again, the light from the hallway spilled in, framing Ash’s silhouette. She walked in carrying a tray with a single glass of water and a small, soft cloth.

"Have we calmed down?" Ash asked, her tone maddeningly motherly.

Khaos glared at her, her red-rimmed eyes full of spite. "Go to hell."

Ash sighed, setting the tray down. She knelt beside Khaos, ignoring the girl’s attempts to scoot away. "You’re still so prickly. It’s exhausting, Khaos. Truly."

With a gentle but firm grip, Ash turned Khaos over. The girl let out a humiliated yelp, her face burning. Ash checked the tabs, her glowing horns dimming to a soft, rhythmic pulse.

"You stayed dry," Ash noted, a hint of genuine surprise in her voice. "Perhaps there is some discipline in there after all."

"Let me up," Khaos growled. "Enough of this game."

"It’s not a game," Ash said, her voice dropping to a low, serious register. She reached out, her claws retracted, and ran a hand over Khaos’s white hair. "You are a weapon that doesn't know it’s a weapon. You are a thousand years of trauma wrapped in the skin of a child. If I don't break you of these impulses, the others will find you. And they won't be as kind as I am."

"Kind?" Khaos laughed, a harsh, jagged sound. "You’ve stripped me and put me in a diaper. You call this kindness?"

"I call it safety," Ash replied. "As long as you are under my care, and as long as you are kept... manageable... the High Command won't see you as a threat. They’ll see you as a pet. And pets are allowed to live."

Khaos went still. The mention of the High Command—the remnants of the Viltrumite Empire—always sent a chill through her. She knew they were looking for her. An albino anomaly, a pure-blood who refused to join the expansion.

"I don't want to be a pet," Khaos whispered.

"Then learn to be a shadow," Ash said, her red eyes softening just a fraction. "But for tonight, you will stay like this. You will sleep, you will be cared for, and you will remember what it feels like to be powerless. Maybe then you’ll value the power you have enough to use it wisely."

Ash stood up, picking up the tray. She moved toward the door, but stopped at the threshold.

"I’ve left a blanket by the hearth," she said. "If you try to fly, the weight of the garment will trigger a localized gravity increase. Don't hurt yourself trying to be something you aren't ready to be."

The door closed again, leaving Khaos in the dim light. She crawled toward the hearth, the crinkle of the diaper a constant reminder of her predicament. She hated the softness of the blanket. She hated the warmth of the fire. Most of all, she hated that for the first time in a century, she didn't have to worry about being a warrior.

She curled into a ball, her small thumb hovering near her mouth before she caught herself and slammed her hand into the floor.

"I am Khaos," she told herself, the words a mantra against the encroaching sleep. "I am a Viltrumite. I am a thousand years old."

But as she drifted off, the last thing she felt wasn't the cold steel of a blade or the heat of a sun, but the soft, humiliating comfort of the cloth Ash had forced upon her. And in the depths of her mind, a small, terrifying part of her whispered that she didn't want to fight anymore.

She would never admit it, not even under torture. But as the fire died down to embers, the girl who had seen worlds burn finally closed her eyes and let someone else carry the weight of the world.
Contents

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