Ruby Rose trudged down the serene forest path alone, it had been a few years since she'd set foot here. Memories of the Beacon Academy Initiation fresh in her mind, meeting for the first time, the people she would grow deep bonds with like Jaune, Nora and her teammates; Yang, Blake and Weiss. Turning her mind back to the mission, Ruby continued down the path till she came to a stop at a cave opening that looked like it was gouged out of the earth by massive claws that only a powerful Grimm would have, either that or some shady group was out here doing some heavy excavating. But the lack of equipment and the eerie silence pointed her to the former. She was here after reports came in from Hunters and civilians about an unknown Grimm sighting in the Emerald Forest, the curious thing being that there were no attacks but the authorities weren't going to wait around for some unlucky soul to fall prey to the beast, putting up warrants and sending out extermination groups of Hunters and soldiers to put down the creature, returning with no results. Ruby was alone then and deciding to take on the challenge and busy herself, went out to confront the creature. Taking a deep breath to sharpen her nerves, Ruby sets foot into the dark cave, Dust fueled torch in hand, unaware that this would be the final time she'd ever see daylight...

After what feels like hours walking around the seemingly endless maze of tunnels, Ruby decided to take a short rest stop, placing the torch on a tall rock as she rests on another, fishing around her pouch for a replacement battery of Dust for the torch. As shes about to swap out the battery however, the feeling of an incoming attack forces Ruby to abandon the torch as she backflips out of the way while drawing her trusty Sniper-Scythe; Crescent Rose, ready to counter but no attack comes, instead focused on the torch, smashing it to pieces as the narrow tunnel space is drowned back into darkness. Ruby backs up to the cavewall ensuring nothing could come for her from behind as she prepares an offensive stance, sharpening her hearing in preparation for the enemy to strike. All she can hear in the dark are massive claws scraping against stone as the Grimm keeps pace around her, probably observing her before it barks a guttural roar at her. Assuming it to be a prelude to an attack, Ruby braces herself in the direction where she assumes it to be...only to be hear its paws skitter away further down the dark cave. Flabberghasted, Ruby puts away her weapon, quickly giving chase as she follows down the narrow tunnels "I swear im gonna put that furball in it's place once i get my paws on it...wait what?"

As Ruby grinds to a halt, confused at what she just said. She feels a trickle of liquid flow down her shoulder. Looking down in the darkness, she sees the fabric of her shirt torn apart around a small spike embedded in her arm. Thinking fast, Ruby removes the spike and examines the wound."It must've been coated in some natural anesthetic...when did it hit though? I don't remember that furball landing any hits..." Ruby trails off, unsure of her own memory, she could've sworn she'd given chase because she had the Grimm's trail, stopping only because she'd noticed the wound she'd received...and speaking of the wound, when was she able to see so clearly? Normally in this amount of darkness she'd have to be careful when navigating even if her senses were honed but now? She was able to see normally as if the cave was lit by an ambient light source. Starting to suspect the spike to be poisoned, Ruby tries to go back the way she came only for her to trip as an unseen hand takes advantage of the confusion, roughly pulling on her cape as she turns her back, sending her flying deeper into the cave as the sound of fabric tearing apart rings out. Tumbling to the ground, she cushions her fall with a furred limb, bounding with muscle...wait, furred? Muscle? Ruby's eyes widen in shock as she looks at her furry arms, still human but covered in shaggy black tufts of fur similar to that of those found on Grimm, with the skin beneath pitch black and smooth instead of her usual peach coloration with hints of musculature pulsing beneath. Her panic is cut short as Ruby's head begins to hurt as her vision focuses on a humanoid entity with visible Grimm elements dotting his body, just like her. Snarling, she grits her teeth and shakes her head wildly, trying to rid herself of those thoughts that sounded so wrong! She was human...no, Hellhound! A Huntress? Definitely not, they were the enemies of her kind, hunting those close to her! What about her team? Her pack? But she still had the Silver Eye in her blood...if only she could use it to...get that hunk standing right there...he'd be a perfect mate to bond with! Thankfully she had her killer body to do it with...She still had a home to take care of right? Her home needed work now that she thought about it, more space to grow the warrens, for her offspring to run freely in and enjoy life safe underground...it sounded so right to her!

While Ruby fights a losing battle in her mind, her body changes further as the last of her clothes shred apart as her expanding body bursts free, ripe with muscle honed after decades of bounding and scaling through fiery rock and tall trees on all fours. Her skin now ash-black as the shaggy fur from earlier coats most of her body. Her facial features are the last to vanish as the visage of the cheery girl vanishes into one of a tomboy as her features harden and age, hair spilling out into a shaggy unkempt mess similar to the fur adorning her powerful body. The final change to occur forces an animalistic howl of pleasure out of her, sharpened canines visible in her crimson jaws as a long, equally furry tail wags excitedly in the air. Exhausted, the newborn Hellhound lies splayed out on the cave floor, her naked body exposed to the cold air as her massive bosom jiggles gently, rising and falling with each heavy breath, her tongue lolling as drool drips from her soft lips. As the final remnants of Ruby Rose lie defenselessly on the ground, closed eyelids twitch slightly, panting and yipping as pangs of pleasure shoot through her new body, the mysterious Grimm makes his approach, heavy paws stamping toward the female Grimm, he could smell the stench of her snatch all the way from the other end of the tunnel and that could only mean one thing for a female of his kind; she was in heat, ready to bear the next litter of cubs that would populate the warrens once more, She'd finally get what was coming to her after her and her kinds mindless slaughter of his family years ago...

-A FEW MONTHS LATER-

Deep within the subterranean network of tunnels that had mystreiously expanded within the last 4 months in the Emerald Forest, loud sounds of flesh slapping against flesh along with loud bestial howls and the occassional cries from a pleasured woman echo across the walls. From a distance, the sounds would scare away Hunters and unwitting spelunkers, assuming the wails to be evidence of the caves being haunted by many tortured souls, a deep hell awaiting those who had gone too deep; as the occassional Hunter and cave diver dissapearing proved. But if you were one of the denizens living within the warrens beneath, you'd know it was just the sounds of passionate love making between a previously grief-stricken, lonely Hellhound who'd recently found a loving mate of his own. Normally, any ordinary Grimm wouldn't have lasted long in the world above, but this one was special; with human level intellect (possibly even greater) and the ability to change his form to that of a human...he also had a neurotoxin that would change those afflicted with it into regular Grimm, having particularly stronger effects on those with notable abilities like the Hunters; changing them into well endowed Grimm of his kind like the one bouncing off his member on top of him, furry paws bracing herself as she shoves her sopping wet snatch up and down his entire length, howling and panting as she goes before she swings her head back in ecstasy as he releases within her, coating her womb in yet another serving of baby batter as she arcs her back in climax, sticking her wobbling chest in the air. He carresses her warm, tender belly with a worn hand, looking at her stern features as they soften into a kind smile, he mentally compares her to when he confronted her back then, catching sight of her and sensing massive potential; a young, strong willed Huntress, sculpted into his mewling wife bearing litters of kids to replenish those she and her former kin slaughtered. Gone was the short haired girl dressed like a Red Riding Hood. Initially bitter and intending to treat her as nothing more than a bitch, his relationship with his supposed sex slave soon blossomed to that of love, as he no longer saw her as just a human fleshdoll, rather a lovingly passionate Hellhound mate that would spend the rest of her days doting and playing with her children in the warrens and hunting for food with him above ground, disguised as a loving human couple making a living in the woods. She grew her shaggy mane out over time, her toned body getting stronger and faster with each passing day and with the occasional bout of rough sex, grew more and more addicted and devoted to her Alpha. His life was complete, content with his beautiful mate and litter of Hellhound cubs to carry on his species survival, he didnt need to use his powers unless he was forced to...but for the forseeable future? No trouble would come, his new family safe and protected within their warrens, a Hellhound heaven deep underground. His thoughts are interrupted as his mate rises off his member with a pleasured grunt and squirts of transparent fluid landing on his chest, excess cum dripS from her lower lips as she growls lovingly at him, leaving the room with a swish of her bushy tail and long, raven black hair, tending to her cubs. Smiling, he closes his eyes in peace as he falls asleep...surely a nap every once in awhile wouldn't hurt with someone as capable as his mate by his side?

THE END