Leona walked steadily through the hangar, her padded footsteps soft against the metal grating, but still echoing throughout the cavernous space. It was built to house mecha, the towering machines of war that were all that stood between survival and the titanic monsters hellbent on destroying the city. Since she was little, the Hrothgar had dreamed of being a fierce warrior, singing songs of battle as she tore into her enemy. Now the enemy was here, and it was more than she could possibly face: colossal creatures of muscle and bone, armoured blades able to shrug off shots from even the most powerful rifles she could carry. Any blade would be useless against their armour, meaning nothing to a foe that could crush her in a single step without ever noticing she was there.
Which brought her to the hangar, and her future as a pilot. It wasn’t the life she’d dreamed about, training all those years ago, hacking into practice dummies. Though, if it meant she could stand toe-to-toe against her enemy, armoured in one of the most powerful machines ever created, she would give anything for the opportunity.
Which, in a way, she was.
Ahead of her, a lone technician worked, surrounded by consoles and machines, the support system at the base on one of the mecha bays. It was empty now, the support frames in their open positions, repair arms stowed, the re-supply umbilicals coiled up, waiting. The war was taking its toll on both pilot and machines, and what few mecha this hangar still serviced were out on patrol, or locked in combat with their monstrous enemy.
“Oh, you must be my new pilot!” The technician called out, turning to face Leona, radiating cheerfulness. She was short, stoutly built, her bulky crimson jumpsuit hiding her body, though Leona guessed she was human, or something close to it. Leona towered over her, almost her opposite. The feline Hrothgar’s body rippled with muscles, the short sleeves of her pilot’s uniform showing off her arms.
”Yessir, Pilot Trainee Leona, reporti-“
”Relax, relax, we’re not formal here,” the technician replied, smiling up at her, “besides, I should be calling you sir. I’m here to help, whatever you need.”
”Right,” Leona replied, relaxing a little, eyes glancing around the space. There was a curving bank of monitors, displaying readouts or status information or things Leona couldn’t guess - one might’ve been to show the mecha’s condition, now blank, another for the pilot… One was clearly a map of the city, coloured blips showing mecha and monster, locked in battle. It didn’t seem to be going well, the mecha clearly outnumbered. Leona’s fur bristled, eager to fight.
“First things first, your pilot’s suit,” the technician gestured to a black bodysuit, cradled in a frame. It looked small, barely able to fit the technician, let alone Leona… though, she imagined that was going to change, pretty soon.
“I assume you know the suit will change you-” the technician started, cheerfulness dropping for a moment.
“Yes,” Leona interrupted. She was no stranger to having her body altered, transformed. Though the last time was out of choice, correcting an accident of her birth.
“Alrighty,” the technician replied, pausing for a moment, “don’t ask me why they’ve got to be worn by humans. Something about the nervous system, or needing bare skin for the contacts. Still!” She added with a wink, “I’m sure you’ll enjoy the experience. Most folks do.”
Leona looked at the technician for a moment, wondering what she meant, before turning her attention back to the bodysuit. It wasn’t quite black, but a deep charcoal, the shiny surface criss-crossed with the faint patterning of sensors and support systems interlaced through it. It wasn’t enough to simply control a mecha with a joystick, a pilot had to interface fully, melding their nervous system with the machine, almost becoming one with it.
“There’s a changing room around the corner, if you’d like…” the technician offered, blushing and turning away as she saw the Hrothgar already stripping out of her clothes.
“No need,” Leona replied, unafraid of who she was, “besides, not like it’s going to be my body much longer, right?” She cracked a smile, seeing the technician only blushing redder. Leona took a moment to look down at her body; the rise of her breasts, the cock hanging free between her legs, the tail swishing behind her. She’d wondered how much would change. She’d miss the spots and tail, of course, but what else would she lose - or gain - along the way?
Only one way to find out.
She lifted the bodysuit from its hangar, feeling the smooth synthetic material in her paws, cool to the touch, tingling slightly. Draped in her arms, it seemed impossibly small… even if it was going to change her. She flipped it around, unzipping the seam that ran parallel to the reinforced spine. Made of segmented metal, studded with data ports, it would become the interface between pilot and machine.
Leona slipped a leg inside. The material stretched around her invading leg, hugging it tightly as she awkwardly stuffed her paw into the foot. So far so good, she thought, stepping her other leg inside. Somehow, it was stretching to fit her feline body, but she could feel the shape of it almost fighting against her, designed for a body so different to her own. Taking a quick moment to tuck her cock into the sheath inside, she pulled it up and over her torso, slipping both arms though, fingers just about squeezing into the suit’s glove-like hands. Again, the suit seemed to squeeze her body, fighting against her size.
The torso itself hung oddly limp, unfastened behind her. She reached back, gloved hands trying to find the edges.
“Um, little help?”
”Oh, right!” The technician quickly moved behind her. She made to seal up the suit, before a forgotten detail caught her eye: the long, feline tail still swishing behind Leona, right at the base of the seam.
“Sorry, ah, I’m just going to—” the technician, slightly clumsily, lifted Leona’s tail and stuffed it inside the suit. If it was going to change soon, it didn’t need to be neat, she reasoned. Leona’s fur bristled a little in frustration — it wasn’t often a stranger played with her tail, after all — but said nothing.
Tail dealt with, her hands gripped the seam, pulling the bodysuit tight across Leona’s body, straining to seal it up. The suit sealed like a vacuum around the Hrothgar’s body, squeezing around her waist, leaving little to the imagination. About the only part it wasn’t tight against was her chest, though it still smoothly covered the curves of her breasts.
“So, this is it, huh?” Leona brushed a hand down her chest, feeling the bodysuit rippling slightly under her fingers, cock stiffening slightly as the fabric pulled tighter against it, “how long before, you know—”
Leona was interrupted by a sudden electric crackle across her body, running between the bodysuit and her furred skin. If it hadn’t been for the suit, she’d have probably puffed up. Millions of nanites, embedded into the suit's under-layer, quickly released into her body. Microscopic, they quickly found their way through her fur, into her skin, wriggling into her blood vessels and carried through her body. They’d been programmed with one purpose: to transform the suit’s wearer for maximum compatibility, and they were very efficient at their jobs.
Already, Leona could feel a warmth spreading through her, the heat generated as the myriad nanites began their work. Cell by cell, they were rewriting her DNA, weaving proteins to suit a new template for her body. Next they stimulated each cell, forcing it to regrow itself to match the new DNA. A subtle change, for an individual cell, but as each nanite completed its work in one cell and moved to the next, her body would gradually shift to its new form.
An itching feeling spread across Leona’s body, the thick coat of fur covering her slowly fading away, withdrawing into her skin. She reached up to her face, feeling the fur vanishing, leaving behind almost perfectly smooth skin. Pale pink, almost white, the closest a human would come to her old light-grey coat.
Leona began to shrink, losing height with every passing moment. Bones ached, muscles straining against her transforming skeleton. Her chest heaved with heavy breaths, heart pounding, coursing blood speeding the nanites through her body. However gradual the nanites tried to make the changes, they were still wrestling against millennia of evolution, her body unused to such rapid changes. Her feet started to shrink down under her, heels moving closed to the floor. Thick digits started to shrink down, gathering closer together, drawing narrower. The thick pads that covered her paws started to fade away, too, flattening against her changing skin.
“No more claws,” Leona thought, trying to flick them free. Nothing responded, the keratin and ligaments turned into something far simpler, much more harmless. Maybe that was why humans needed to pilot mecha, she wondered, they had no weapons of their own — driving them to make machines of war. There was a tugging feeling at the base of her spine, something shifting down her back: her tail, gradually shrinking down the base of the spine, relieving some of the suit’s discomfort.
Leona had expected the tightness of the suit to ease off as she changed, but it only seemed to be shifting: relaxing in some parts, growing tighter in others. As more of Leona shrank, other parts of her began to grow. Her body mass had to move somewhere, and the nanites worked in concert with each other to redistribute the cellular matter through her body. At least, that’s how the scientist’s might have described it. For Leona, it felt like her flesh was flowing. Squashed out of one part of her, running through her body, then gathering elsewhere.
She felt the swelling at her thighs, the soft flesh filling her rear, a gathering at her chest. A growing pressure under the skin as flesh welled up inside her, pushing outwards, straining against her changing form - and the bodysuit still tight against her. Leona’s chest rose and fell with each breath, her breasts rising more each time as they swelled out, thick with warm flesh. She felt the weight of it growing more intense, pulling her forward, the strain against her back. How did humans manage without a tail?
There was still strength in her, but she could feel her body softening, the same rush of flesh swelling out her thighs and ass. Even after her transformation before, ridding her of the masculine body she had been born with, she’d hardly been feminine. Now her body had the curves and hourglass she could only have dreamed of, her flesh soft and inviting as she grabbed handfuls of it. Her heart skipped faster, not just from the exertion of the changes, but the pleasure of her new body. Every inch of her felt sensitive, her cock stiffening under the bodysuit, straining out against the fabric.