Long ago, there were legends of Faunus and Grimm not hunting one another in ancient times. Although today, no proof exists of this occurrence, there have been claims from some Faunus, specifically canines, that some Beowolves, would leave them alone. Unfortunately, there have been no records of such things happening, and the tales were dismissed as delusions. Some tales even went as far as saying there were offspring of Faunus and Grimm, but they were the drunkards tales whispered in bars and back alleys.

But fourteen years ago, a Huntress by the name of Summer Rose had brought back something unique to her household in Patch. Afraid of what could have happened, she had taken the creature with her to decide its fate before someone else could. She believed she had proven those drunkard tales true. Carefully hiding the creature away, she soon realized it acted just like a human newborn. As days passed, Summer grew too attached to the creature, naming it Ruby. She raised Ruby alongside her stepdaughter, Yang, who was skeptical of the new arrival. But as time passed, Yang and her father, Taiyang, grew attached to Ruby.

Yet when Summer died, Taiyang grew cold from the world. But Ruby later reopened his heart with her kindness. She wanted to follow Summer's footsteps and become a Huntress, despite knowing her heritage. But she did it for a different reason: to try and protect her kin. Against all odds, she began training, aiming to become a Huntress.

A young girl in a red cloak stood by a gravestone that read: Summer Rose. The girl's head was bowed low as if in respect. "::Mom…::" The girl whispered, but the words came out instead as a guttural whimper. Nearby, the girl's sibling watched her grieve.

"Ruby." The blonde girl said slightly impatiently to the aforementioned girl in the red cloak.

Ruby didn't give any sign of hearing the blonde's words. She tried again, summoning the lessons in Grimmspeak Ruby had given her, and then snarled out, "::RUBY!::"

Finally, Ruby turned to the girl and responded in English: "Yes, Yang?"

Satisfied she had finally gotten Ruby's attention, Yang replied. "We've been here long enough. Let's get going back before it gets dark. I know you have night vision and the Grimm here are your friends, but Dad will kill us if we aren't back before dark. You know how he worries about us." especially me being out alone with you in the night. Yang said, keeping the last part to herself.

Ruby nodded and walked to Yang's side, the black wolf-like tail hidden under the red cloak swishing. Even with the shadow of her sister's hood, Yang could tell that the face of a Grimm that was her sister, was facing Yang. Her burning red eyes were gleaming in the shadows, before Ruby took the lead back to the path to the house.

As they walked, Ruby's boots made no sound. So the only sound was of Yang's footsteps crunching in the snow and the blonde's breath turning to mist as she exhaled. Tired of the silence they walked in, the brawler decided to fill it up with idle conversation.

"So… Guess who just got accepted into Signal Academy today?" Yang asked, slinging an arm across Ruby's back and feeling the small bone spikes that ran on her spine and shoulder blades and hidden under her cloak.

"You did. Congratulations." Ruby said, forcing happiness into her tone. But inside, there was a familiar roaring in her gut, tearing her heart in two. Yang was her sister, and Yang was accepted into one of the Hunters and Huntresses prep schools. But Ruby was a Grimm, and Yang knew it. Ruby, deep inside, felt betrayed. Yang was going to learn how to kill her kind without remorse. But then again, Mom was a Huntress too, and I love her. So why should my feelings be different for Yang? Ruby asked herself the question she already knew the answer to. Because Yang grew up alongside you, a creature of Grimm. And yet still wants to be a Huntress. The darker part of her replied, the part of her that knew the ancient knowledge of Grimm and that countered her wishful thinking about the real world. About humans and Faunus and Grimm.

"Damn right I did! I can't wait to go there! I'll learn to be a kickass Huntress like Dad and Uncle Qrow!" Yang exclaimed, pulling down Ruby's hood and revealing two blood red eyes and the bone face of a Grimm.

(Red like roses fills my dreams and brings me to the place you rest.)

"Good job Yang, I'm excited for you!" Ruby said, once again forcing her facade of joy. but on the inside, she wanted nothing more than to run away and hide with the other Grimm she called her pack, consisting mainly of Beowolves and a few Ursai and Boarbatusks.

Yang grinned from ear to ear and cracked her knuckles. But a roar broke the joyful seeming atmosphere around the two. An Ursa Minor had caught the anger that Ruby was feeling for Yang and was now circling the pair, but Ruby knew it was after only Yang.

":Help me kill the human who has done you wrong, Sister Alpha!:" The Grimm requested, but Ruby shook her head and willed Yang not to attack.

(White is cold and always yearning, burdened by a royal test.)

Unfortunately, her prayers fell on deaf ears as the blonde brawler chose that moment to prepare to attack the Grimm. Ruby's eyes widened in alarm as she felt the presence of another Grimm in the forest. An Alpha Beowolf was nearby and rapidly coming closer to them. And this particular Grimm, Ruby sensed was here for one and one purpose only: take Ruby's pack and maybe even Ruby's life. In the process along with Yang's life if it could.

"Yang! We need to get out of here!" Ruby shouted, knowing that she didn't have much time to get out before the Alpha came, and maybe even with its own pack.

"Why should we? It's just an Urs-" Yang said before the Alpha's howl drowned her out:

":I COME TO CHALLENGE YOU FOR LEADERSHIP OF YOU AND YOUR PACK!:" It roared, and Ruby could feel its presence almost upon the duo of sisters.

(Black the beast descends from shadows)

Knowing she was out of time, she stood tall against the Alpha as it bust in front of her and stood, poised to attack her. But there was one law the Beowolves governed by: In order for a full challenge, the current Alpha must declare their acceptance. Then, it was a battle for the death.

"::No, I will not accept your challenge. You are to leav-::" Ruby said. But the Alpha had already abandoned his primary objective in favor of decking Yang headfirst into a tree. "::YANG!::" Ruby roared in anger, discarding her cloak to reveal a black stealth suit that had holes tailored for her tail and the spikes that ran on her shoulders and spine.

(Yellow beauty burns, gold)

"R-Ruby?" Yang asked after a burst of red petals had smashed the Alpha off of the blonde, who turned to watch her sister unleash hell on the Grimm.

"::YOU HAVE A LOT OF NERVE COMING HERE, AND EVEN MORE SO TO DIRECTLY HARM A PACK MEMBER OF MINE!::" Ruby screamed, landing hit after hit on the Alpha Beowolf. Yang didn't need to know Grimmspeak in order to understand that Ruby was furious- livid, even. And that the Alpha Beowolf was good as dead when Ruby would be done with it.

Ruby was breathing hard as her resolve kept her going. In an instant, the Alpha went slack in her punishing grasp. Ruby stopped for a miniscule heartbeat, thinking the Grimm was defeated. But that was exactly what the Alpha was waiting for.

With a surge of strength, the Alpha Beowolf threw Ruby off it and watched her with mild interest as she flew backwards. Fatigue was starting to take over Ruby as she realized in her one moment of hesitation, she had turned the tables on herself.

"RUBY!" Yang yelled in horror seeing the Ursa charge towards Ruby. It sparked a familiar flame in her chest. Her semblance active now, Yang shot forward like an arrow and gave an explosive punch right to the impending Ursa's head.

On the offense now on her sister's behalf, Yang swung herself back at the attacking Alpha. And kicked it in the muzzle right where the teeth met, just as Ruby said was a Beowolf's weak spot and a pressure point. Noticing the Ursa getting up again in the corner of her eye, she saw it charge to her surprise, right at the Alpha, knocking it to the ground. Yang heard the Ursa roar something and Ruby replied, sounding out of breath.

":Sister Alpha!:"

"::Thank you for your help, I've got this.::"

A low growl alerted her that the Alpha had Ruby in its jaws, and shook her like a ragdoll. Terror rooted Yang in place, Ruby wasn't moving, her energy spent on the fight against the older Grimm in a territorial battle. For all Yang knew, her sister could be defeated and the Alpha Beowolf was about to snap her in half in its jaws.

"Shit!" Yang swore, but the Ursa got up again and roared, shaking the trees and the ground as it gathered its energy and charged. Each beat rocked the ground and made pebbles levitate for a brief moment before the Ursa crashed into the Alpha, knocking a limp Ruby out of the Alpha's grasp.

"Ruby!" Yang cried out in alarm, using her aura to propel herself to her sister's side. But Ruby was already getting up again.

"::I'm fine, let me finish this!::" Ruby growled before - in a burst of rose petals -slashed one of her shoulder spikes through the Alpha's torso clean through. The Ursa ran to its Alpha's side as the Beowolf started evaporating to dust.

":Sister Alpha. Are you alright?:"

"::Yes, I am fine. Thank you very much for your services to me. I will reward you for assisting me later.::"

":Sister Alpha, very well than. It was both my duty and honor to help.:"

Ruby nodded to the Grimm once, and the Ursa limped back into the forest depths, leaving the two siblings together.

Yang sighed, walking to Ruby's side and hugging the Grimm girl. "Don't do that again, please. You scared the hell outta me." Yang murmured. Ruby just gave a low hum in reply, burying her face into Yang's thick mane of hair. "Let's go home, Rubes."

A/N: Well then. Welcome to my own RWBY Ruby Rose AU. Yes, this is a Grimm AU, but I have my own unique twists decided for it already. Fair warning that the ending of the story is not a happy one and is dark. I have so many ideas for this, and a few other chapters are almost ready to follow this one. Feedback is appreciated.

Also, a general note: I Fully planned on posting this story and a few chapters in late Beta so far for this story a lot sooner, but issues with the computer and life in general got in the way. But in the meantime, I have been busy on Docs app on my phone, working on new projects. Other than this one, there will be two other RWBY Fanfictions in development at the moment: "Two Worlds", and "Crowns of Dust". Both will come fairly soon, along with many other smaller scale projects I have been throwing about.