Seems like poor Alessio got unlucky and he's not transforming into Tali'Zorah from Mass Effect, well atleast the two were already simmilar to begin with, so not much is changed.

Line art by  Krubz
Coloured by me!
Background art by Siku

And comes with a Commisioned story by  SomeFoxHere
Read bellow:

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Alessio was at his manor, wandering around his spacious library filled with countless books and artifacts. It was a place where he often found solace and inspiration. Today, however, something curious caught his eye—a plastic straw lying on the floor.
"Huh? What's this Emergency Induction Port doing here?" Alessio muttered, picking it up. He blinked in surprise, shaking his head. "W-Why did I call it that? I mean to say... Emergency Induction Port—no, no!"
A sudden wave of dizziness hit him. He stumbled, grasping a nearby table for support. Alessio's head throbbed as his vision blurred and refocused.

Each breath felt different, sharper, as if filtered through some kind of mask, he grasped at his face to feel cold hard metal. He looked down and saw his hands, fingers merging and the skin texture changing from rough marble-like skin to hard metal three-fingered, gloved appendages.

Panic surged through him as the purple texture of the metal continued to spread onto his arm. The change moved swiftly, engulfing his forearms. The muscles beneath his skin tightened and reshaped, becoming more defined yet agile. His bony arms now sported a sleek, mechanical sheen, the purple-black metal reflecting the dim light of the library.
He felt a tug at the base of his neck, and his head snapped back involuntarily. A hood formed around his skull, its material melding seamlessly with the helmet that encased his face. His vision adjusted, now filtered through a purple-tinted opalescent faceplate that obscured his features from view.

Suddenly, his vision dimmed, and a heads-up display flickered to life on the inside of his helmet. The purple visor glowed ominously as words scrolled across it: "Warning: Unknown user detected. Proceeding to acclimate new user to Default User: Tali'Zorah."

Before Alessio could react, his mind was assaulted by a barrage of flashing images and subliminal messages. Scenes from Tali'Zorah's life—her childhood on the Migrant Fleet, her training as an engineer, her battles against the Geth—flashed before his eyes in rapid succession. He could feel her memories and knowledge being forcefully injected into his brain, overwhelming his thoughts and senses.

His shoulders shrunk even more, giving him a more petite appearance, as the metal spread across his torso. The fabric of his clothes merged and change into the smooth, form-fitting material of an Quarian environmental suit. The suit hugged his chest tightly, accentuating a new, feminine curvature that hadn't been there moments before. His heart raced as he felt his ribs and chest compress, shaping into a form more suited for a female Quarian.
He felt a shiver crept down his spine, each vertebrae clicking into a new alignment as his massive 8-foot size shrunk down to 5’8 with each pop. Alessio's mind struggled to keep up with the influx of foreign memories. Engineering schematics, combat strategies, and personal recollections of Tali's interactions with her crewmates flooded his consciousness. The HUD continued its relentless assault, flashing subliminal messages: "You are Tali'Zorah. You belong to the Migrant Fleet. Protect your people."

The suit continue the changes, he felt his pectorals grow fatter, no they were breast, he was growing motherly sized breast, as the suit clung to his slender waist and hips, he could feel his manhood becoming tighter as it was covered by the suit, feeling it throb away into nothingness. The material was not only protective but also incredibly flexible, allowing for an impressive range of motion. Alessio gasped as he felt his legs begin to shift. His thighs thickened slightly, becoming fatter beneath the tight suit. His knees buckled, and he fell on his plump butt as his legs reshaped themselves, the joints reversing direction to form the distinctive backward-bowed structure.

His lower legs stretched and slimmed, the transformation sweeping downwards in a relentless tide. His feet, once corvid and scaled, morphed into three-toed agile and delicate feet. Each toe ended in a sharp, sturdy claw, providing a firm grip on the ground. The sensation was surreal; he could feel the texture of the floor through the suit's advanced materials, every step resonating with a new sense of power and precision.

Alessio's hands moved instinctively, activating the Omni-tool that now adorned his wrist. The holographic interface sprang to life, its familiar glow illuminating his surroundings. His mind buzzed with new information, memories of the Migrant Fleet and a life lived among the stars.

"I need to check the flux capacitance on the drive core" he thought outloud, and then blinked in confusion. "What... What am I thinking?! Why do I know what a drive core is?"
The HUD flashed again: "Warning: Storage space full. Proceeding to remove unnecessary memory." Alessio's heart pounded in his chest a new wave of dizziness hit him as his own memories started to fade. His childhood, his life at the manor, his very sense of self—everything that made him Alessio—were being erased.
"No, stop!" Alessio tried to scream, but his voice was muted by the helmet. The suit's programming was relentless, "You are Tali'Zorah. Alessio does not exist. You belong to the Migrant Fleet." The subliminal messages grew stronger.
He remembered the laughter of friends on the flotilla, the stern yet loving guidance of his father, and the pride of being named Tali'Zorah nar Rayya. The name felt right, felt real. Alessio's essence was being overwritten, each engineering fact and memory of Tali's life erasing a piece of Alessio.
The room around him began to shift, the surroundings of Alessio’s manor dissolving into the dim, bustling atmosphere of a Purgatory Bar. The opalescent faceplate that shielded her from the world reflected the bar's dim lights.

His thoughts became clear again, but they were no longer his own. He—or rather, she—remembered the Migrant Fleet, her engineering duties, her friends, and allies. Tali found herself sitting at the bar, a half-empty drink of Brandy triple filtered, before her. She felt a lingering dizziness, her head heavy with the last remnants of Alessio's fading consciousness.
"Keelah, this is the last time I partake in recreational drinking," she muttered, shaking her head, the weight of her Omni-tool on her wrist, the feel of the suit's material against her skin, and the strange comfort. She stood up, ready to return to her duties, the night's odd events already becoming a faint, forgotten memory.