Birthday gift from  WeebWriteMan for my birthday, which was the 16th and I just remembered to upload this. Enjoy.

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A gloved hand picked up a green orb off upon the ground, bringing it up to her face as
she brushed her long dark hair behind her ear before turning back to her companions.
"More materia.” The woman named Tifa said, looking into the glassy ball. “What do you
think this one does?"
The odd crew before her crossed their arms or tilted their heads, consisting of a blonde
mercenary, a large man with a gun for an arm, an innocent looking girl and a strange
creature, covered in red hair with the tip of its tail set ablaze.
The girl, her name Aerith, stepped forward as she outstretched her hand. "May I? I
should be able to find out."
The other woman offered it to her as the innocent girl went to work, her eyes closed as
she hovered her hand over its shining green surface. "Hmm..." She muttered, before
opening her eyes and smiling. "How interesting! It's Transform materia."
"Transform? Huh..." She looked around at the group once more, lifting the materia up
into the air. "Would anyone like to hold onto this?"
"I can." The creature spoke, his voice low in tone and well-mannered, stepping up to
Tifa as she kneeled down to offer it to him. The materia they had found on their journey
thus far had assisted them in more ways than they could count and to have more on
hand would only help them further.
She knelt down to the creature, nicknamed Red XIII on accounts of his colour and the
number marked on his leg as she outstretched the orb to him. He stopped before her,
sniffing the orb curiously before opening his mouth to take the materia from her when it
suddenly lit up bright, a sudden blinding flash bursting forth from it as a sharp pain shot
through Tifa’s arm, getting her to wince and shout in pain as she stood up suddenly,
dropping the materia as it fell to the ground and bounced against the floor. She
staggered backwards, shaking her hand as she held her wrist, sucking air through her
teeth as the other three tensed up and took a worried step forward while Red looked
surprised, the creature’s brow furrowing as he looked up at the woman before him.
“Tifa! You okay?” Cloud asked with a hint of worry in his otherwise monotone voice, to
which she responded with a small nod.
“Y… Yeah, I’m fine... “ She said, still shaking her hand as the sensation of pins and
needles shot through it, a weird sinking feeling taking root in her gut as she looked
down to her hand. “...I… I do feel kinda weird th—”
She cut herself off, her eyes being drawn to her fingers as the sight of thick, dark hairs
emerged from her fingers while sharp pains shot from her fingernails, claws beginning
to emerge from underneath them as she turned her hand slowly. Her eyes flicked back
and forth from each sprouting patch of hair as she began to tremble, clenching her teeth
as her chest tightened and her breathing quickened, pulling her arms tightly to her side
as Cloud's eyes widened, dashing to her side. "Tifa!"
The large man, Barret, clenched his jaw as he shot a glare at Red. "What the hell did
you do?"
But he had no words, his eyes wide with shock as Cloud held the struggling Tifa firmly
as she groaned and whined in fear, her fingers thickening and bulging as fur bristled all
over her body. It got underneath her clothes, creating uneven lumps in her thigh-high
socks as she shook uncontrollably, spreading her legs apart as she lifted the heels of
her boots off the ground and gripped Cloud’s arms tightly. Her canines slowly started to
grow, poking into her lower mouth as the black fur crested onto her lengthening ears,
becoming short, cat-like points while her nose and jaw slowly started to distend from her
face. She continued to struggle, a thin bony tail growing out from her skirt, her clothes
starting to bag in places and tighten in others, the front of her red shoes starting to
bulge uncomfortably from the growing paws and claws contained within.
The group was in full panic, Cloud forced to struggle keeping his changing friend up on
two feet that was getting harder by the second as her whines and scared yelling turned
more and more bestial by the second while Aerith and Barret just watched in shock. As
Tifa’s long black hair slowly changed shape, running along the ridge of her longer,
thicker neck her clothing began to give in places, her gloves starting to burst from the
pressure of her large growing paws. Her body was contorting into strange shapes, her
limbs bending in strange ways, hearing the crack of her joints as the muscles bulged
around her shoulders and thighs, her once-human face turning into something bestial
yet familiar before Cloud as he struggled against her claws digging into his sides. She
was slowly slipping, losing her balance as Tifa’s posture forced her forward more and
more, struggling to stay upright as her paws no longer gave the flexibility of human
hands. She whimpered, her body now fully covered in dark hair as she tried her hardest
to stay up, to keep that remaining feeling of humanity… before she slumped to the floor,
landing firmly on the ground with all four paws.
Her gloves and boots were left in tatters, her top tight around her chest and shoulders
while her suspenders sagged with her new form as she stood awkwardly, her legs
spread as she struggled to find her footing, her eyes cast downwards as the group took
a step back and looked at each other in shock and confusion.
Aerith glanced at the others and then to Red, who had his eyes cast down with guilt
before she pulled a worried face. “Right. Um, don’t worry guys. I’ll see if I can reverse
this.” She took a hesitant step forward, kneeling down next to Red as she rested her
hand comfortingly upon his back. “Don’t feel bad. We’ll sort this out, okay?”