A.N : This is my first story ever made. The idea for this story has been inspired by the crossovers "Naruto the Scythe Master" by fairy tale dragon slayer and "Tsuna Schnee" by NonaryNathan999.

P.S : I couldn't find the date of birth for Ruby, so I stuck with the date of her first introduction in the "Red" trailer, November 5.

Disclaimer : I do not own One Piece or RWBY.

Rebirth of the Straw Hat

Chapter 1

"These weapons are so awesome!" came the voice of a 15 year old boy with short and messy raven hair and round black eyes, though at the moment they seem to have stars in them.

He has a scrawny but well built physique, and peach skin complexion with the inclusion of a scar with two stitches under his left eye. He wears a sleeveless maroon colored hoodie currently zipped up, black cargo shorts with a yellow sash wrapped around the belt and a holster to carry a foot long rod, a pair of sandals, and a straw hat.

The rod itself is blue with four lines that glow in colors of red, light blue, yellow, and mint green along the shaft with small buttons next them, and it appears to be hollow.

The young man is named Luffy D. Branwen, or at least in this life. He also has memories of when he was named Monkey D. Luffy, the Straw Hat Pirates captain and at this point the former Pirate King.

He doesn't know how this "being reborn" stuff works, but he is willing to enjoy the new life that was given to him with his new family.

He never knew his real parents in this life, but was adopted by a Qrow Branwen to be his son. The idea of having someone that would actually play the role of a parent was still new to him, as he never knew anything about his old mom and dad except for the father's name and occupation.

"I know right! By the way, do you need any dust for your Clima-Tact?" came the sound of Ruby Rose, Luffy's cousin-in-law of the similar age being six months younger, as she is gesturing to the rod he is equipped with.

She stands at a 5'2, with Luffy being taller than her at 5'7, with a pale complexion and has shoulder length black hair with a red tint and red tips that frame the right side of her face, which show a pair of round silver eyes. Her outfit consists of a red cloak, black blouse, skirt, and cincher that have red on the laces of the cincher and trimmings on the skirt. She also wears a belt around the waist that holds cartridges, an ammo pouch, and a rose emblem all in silver. She also sports a pair of black leggings and combat boots with red soles and laces. Her weapon, a hybrid of a sniper and a scythe called Crescent Rose is magnetically holstered to the back of her waist.

They are currently in a shop called "From Dust Till Dawn" looking at weapon magazines in the back corner. They convinced Ruby's dad to let them visit the city of Vale, where they can do some shopping. It was currently nighttime, but the duo got a little carried away upon seeing the "Weapon Highlights" magazines.

"Hmm, no I'm good, the only time I use this thing is when I use my semblance. Oh, when are we going to eat, I'm starving?" Luffy stated followed by a common question that Ruby got used to.

He only really relied on punching and kicking, so he doesn't use his weapon as often.

While this foreign world is more technologically advanced than his old one, the residents also have a form of energy that manifests from the soul called Aura along with an unique ability called a semblance, an energy source known as Dust, the creatures of darkness that hunt humanity to extinction named Grimm, and the fact that almost every weapon has a gun attached into its design somewhere.

There was even another race of people with animal traits called faunus, which remind him of the Mink Tribe.

That aside, after a certain incident in his life when he was five, the memories of his past life came rushing back to him.

"Luffy, you're always starving, you ate just before going to Vale, and that was a few hours ago." Ruby commented dryly, not paying any attention to the newcomers that entered the store.

How he can devour more food than the entire family altogether, she will never know except for the fact that his stomach may as well be a black hole. She had to make sure that Luffy didn't get a hold of any money, since it would've went to just food rather than more important things.

His irresponsibility also lead to him not owning a scroll, since he may more than likely lose it somehow. This also lead to Ruby being a bit more mature at points, as it felt like she was babysitting him even if he was older than her by six months.

"Oh, but I'm still hungry." the straw hat boy whined. Ruby can only sigh at his complaints.

"We can go somewhere to eat after this, but only if you bake me a batch of cookies along with everyone else's dinner." Ruby said with a smirk.

She would use this chance to request something in return, since he would do anything to get an extra bit of food. Not only that, the odds are likely that they would spend the rest of the money on hand solely on Luffy's appetite.

"Geez, its like you are abusing my semblance just so you can have cookies, and you think I eat a lot." Luffy pouts at her for the exchange.

"So are you done shopping here or what?" He says with a sound of impatience. He wants to fill himself up as soon as possible.

"Yeah, I already stocked up on ammo, since I ran out when I was fighting those Beowolves." Ruby replied with a sigh.

She was just visiting her mom's grave when they appeared, and she spent all that ammunition to decimate the horde.

"Shishishi, you shoot way too much Ruby, you need to swing harder if you want to stop running out. Maybe you can learn how to fistfight so your arms get stronger?" Luffy suggested with a grin as he points out the redhead's flaws.

She can lift and swing the scythe no problem, it's just that she relies on the recoil of the sniper to tear the Grimm apart. If she had better arm strength, she wouldn't have that problem in the first place.

"I'll do just fine with the way I fight with my sweetheart, thank you very much!" Ruby rejected with an adorable pout.

It just didn't suit her to start using her fists, even if it may help with her arm strength. Besides, she likes the feeling of using her 'sweetheart' in battle.

Luffy just shrugs his shoulders and continues looking through the weapon art with a twinkle in his eyes, not wanting to force someone to do something they don't want to do.

They continued looking through the reading materials until Luffy sensed a presence approaching them from behind them with Kenbunshoku Haki (Color of Observation).

"Oi Ruby, someone's coming." he warns her calmly.

He is pretty thankful for being able to re-unlock his Haki in this world. At the early age of 7, two years after recovering his memories, he decided to go all out in training to return to normal fighting strength with the help of Qrow, which meant that he had Ruby as a sparring partner.

Although his semblance, which he discovered later, just added more to the amount of training. However, his body is still a bit weaker than his previous one so he's limited on what he could manage. Sadly, he also lost the insanely high resistance to poisons as well.

Aside from all of that, he may possibly be the first Haki user in Remnant.

She nods in acknowledgement, as she and the rest of her family have known about his Haki. They both turn around to find a man in a black suit with a fedora pointing a gun at them.

"Hey, hands in the air where I can see them!" the man yells in a commanding tone. The seconds of silence afterwards was broken by a question from the pair.

"Are you trying to rob us?" they said with a straight face.

"What does it look like to you brats!" he shouted back. The duo looked to each other with a mischievous grin as they planned their next move. Ruby used her speed semblance to launch herself at the thug and sent them both towards the window.

Roman Torchwick, a top class criminal known for wearing a bowler hat on top of his orange hair that covers his right eye. His attire consists of white suit, black pants, and shoes. Holding to his weapon of choice which is a cane, he could be seen at the register inspecting a red Dust crystal before hearing glass break.

"Can someone see what that is about?" he groaned in exasperation at the possibility that someone is interfering with a robbery.

One of the grunts moves over to the now broken window to witness a young girl standing on top of his downed comrade.

"Gomu Gomu no Pistol"

The thug turns towards the source of the voice, only to see a stretched out arm heading towards him. The dumbfounded robber could only look in shock as the fist hit his abdomen, sending him outside with his unconscious comrade. No one else saw the stretching arm due to the shelves blocking their vision.

Luffy simply wears his traditional toothy grin as he jumps through the store window to regroup with his cousin, who is unfolding her scythe. They both turn to look at the rest of the robbers with a serious expression.

The orange haired criminal lets out a heavy sigh at the development in front of him.

All he asks is for one heist to go without a hitch, that's all.

"Well... don't just stand there like idiots, get them!" Torchwick commanded his henchmen to attack the duo.

Luffy and Ruby jump away from each other to give some breathing room to work with. It was their usual battle plan; simply staying out of the other's fights, waiting for the other to finish if either ended their own fight first, and only stepping in when they're beaten or an outside force wants to intrude.

The thugs split their numbers to attack both, not knowing that their opponents wanted that.

With Ruby, she once again launches herself at one of the enemies, this time using the recoil of her sniper to propel herself much more faster. Both boots land on his face and she jumps off of the makeshift springboard, then plants the end of her scythe on the ground to swing with the momentum and land a double heel kick on another grunt on the side of his face, sending him to the ground. Another grunt charges her, but before he could get in range, she touches the ground and twirls her weapon to slam the back end into his side, taking down another.

Meanwhile, Luffy, having a lot more baddies to deal with, jumps into the fray and throws a right at the first grunt in front of him. He turns to the next person and jumped to slam his knee into the second thug's jaw. Luffy swung his leg while in the air to kick him in the side, launching the guy to knock some others down.

The straw hat boy saw a blade heading his way and bent back in midair to dodge it. He planted his hands on the ground before he spun around, landing another kick to an unfortunate soul. The grunts decided to back off a bit as he returned to his fighting stance, fearing the scrawny boy's unexpected strength.

It really didn't take that much effort to take each of them down since they're so weak though, even for cannon fodder.

One decided to sneak up behind him and swing his sword, but Luffy senses the attack without visibly seeing it and ducks under the blade. He spins on one foot and trips the attacker with his other, causing him to land face first into the pavement.

Another approaches from the side and prepares to hit him with a metal club. Luffy stands back up but doesn't even try to dodge, as he raised his arm to block the strike.

Although the attack won't work anyways since he has a rubber body.

"Busoshoku: Koka (Armament: Hardening)"

The raised arm shifts from peach skin to a black metallic look that goes up to his elbow. The club connects, but to the astonishment of the offender the weapon dented itself upon impact. Luffy pushes back the damaged weapon and prepares to swing his leg.

"Gomu Gomu no Muchi (Whip)" he swings his outstretched limb in a wide arc to take out the rest of his opponents out.

Torchwick looks on in surprise by the event that prompts him to ask the weird kid what seems like the most obvious question.

"Okay, what the hell was that!?"

"Shishishi, I ate the Gum Gum fruit, and now I'm a rubber man. See?" Luffy answers and then emphasizes his point by stretching his cheeks out to impossible lengths before snapping them back into place.

He can recall the day he got it back.

Nine year old Luffy was walking though town with Qrow on an errand to get groceries before talk of a traveling salesman invaded their ears. Being the curious boy that he is, Luffy wanted to meet the man.

Qrow was a man with black spiky hair that is graying out along with red eyes and his scythe in sword form holstered on the back waist like Ruby has with her Crescent Rose. He wears a grey dress shirt with black dress pants and shoes, as well as a red tattered cape and a crooked cross shaped pendant.

When they found him, the salesman came across as a shady type with his red trench coat hiding everything underneath it, a matching pointy hat, and a large backpack. His face was mostly covered, the only thing the two could see were his eyes.

Luffy approached him with no sense of danger while Qrow stood close by, unable to gauge the mysterious person's intentions.

"What do we have here?" came the deep voice of the salesman as he regarded the boy's presence with interest. Luffy just stands in place staring up at him in silence.

"Hey, old man. What are you selling?" Luffy asked, wanting to get straight to the point.

"Don't be rude, kid." Qrow chided as he gave a soft bop on the head for lack of manners. The salesman chuckled in response.

"To answer his question, I bear many oddities that I come across in my travels." he replied, getting Luffy's attention at the mention of adventuring.

"An adventurer as well as a treasure hunter, huh? I'll admit, you have guts for combing through Grimm infested territory just to make a living." Qrow remarked.

"Well, I can handle myself in a fight. But enough about me..." he said as he reaches into one of the pouches on his backpack. When he pulled out a purple fruit with swirls, Luffy was wide eyed in shock of what he was seeing. Qrow, however, raised a brow at the strange fruit.

"I'm feeling rather generous today, so I'm willing to part with this exotic fruit at no charge." the mysterious man offered. This rose some alarms in Qrow as he got a bad feeling about this. He whipped his head to his adoptive son and found himself stunned with Luffy's expression.

He would've figured that the boy would be starry eyed at the sight, but he was not expecting absolute astonishment. It was as if Luffy knew what it was exactly yet was surprised to find it out here.

"Can't really call it business unless you get something out of it. If it's not money, then what?" Qrow asked in rising suspicion.

"...Enjoyment." he replied, causing Qrow to stare in confusion of the vague answer. Luffy ignored the exchange as he took the fruit from the stranger's hand.

"I don't know where you got this, but if I'm going to protect what I have left then I might need this." Luffy accepted with a serious expression. Qrow was at a lost of what he's talking about.

How can a fruit help make him stronger?

"I see... in any event, it was a pleasure to meet the both of you." the salesman said, feeling pleased with the boy's words. The man left and merged with the crowd, eventually disappearing from their line of sight.

"See kid, this is why you don't talk to strangers. Some of them give you fruits that could be bad for you." Qrow spoke wisely, but it fell on deaf ears as Luffy already took a bite out of the fruit.

"Bleck! The taste is so nasty." Luffy said, causing Qrow to facepalm himself.

'Dammit... he just had to think with his stomach.' he thought in exasperation. He was about to scold the boy before he was introduced the the sight of Luffy pulling his cheeks apart.

The scythe wielder stood frozen at what he witnessed his kid messing with his stretchy body.

"I'm obviously not drunk enough." he muttered.

Luffy's mind came back to reality to see the criminal staring at him with disbelieving eyes.

'What the hell is a Gum Gum fruit!? Wait, he got that weird ability by eating something... that doesn't make any sense!' He ranted in his thoughts with a twitching eye as he pushes the questions to the back of his mind to avoid a headache then sends his gaze towards his fallen comrades.

"You were worth every cent, truly you were." He shakes his head in disappointment.

They couldn't even put up a fight against two youngsters... that's pretty sad.

"Wow, you must be broke, cuz those guys were really weak." Luffy stated bluntly, stating his opinion on the strength of the criminal's workers while not getting the sarcastic tone being used. Ruby joins him and nods her head in agreement to that.

"As much as I like to stick around a little longer, business beckons me to make an exit. With that, I bid you adieu Red... Straw Hat." Torchwick said in a gentlemanly manner while pointing his cane at the duo as if aiming to shoot something.

Surely enough, two volatile projectiles comes out of the barrel and heads straight at them.

Luffy tilts his head to the side to dodge the first shot, then steps in front of Ruby in protectiveness and used the same black arm to bat the projectile aside with the back of his hand, the flare exploding the concrete behind them.

"I could've dodged that." Ruby mumbled under her breath with half-lidded eyes staring at Luffy's back.

She doesn't needed to be treated like a damsel in distress, as much as she admires the fact that Luffy would put himself in harms way to protect those he cares about.

Luffy then realizes what he just witnessed and can't help but look in awe.

"AWESOME! That stick thing can shoot things! What else can it do?" he says in childish excitement. He is easily amazed by a large portion of weapons he gets to see in action.

Everyone, including Torchwick, sweatdropped at the young boy's sudden change in demeanor.

'Well that was a thing.' Torchwick thought upon witnessing an odd way to deflect the explosive round.

No one just uses their bare hands to do something as crazy as that!

He takes aim again, this time at the ground in front of the pair, and fires another round.

Using her semblance, Ruby dashes away from the spot to avoid the blast, while Luffy pumps his legs to enter Second Gear, giving his body a reddish tint that produces steam, and disappears from sight, the blast having no effect, much to the shock of the marksman.

Before Torchwick can do anything else, Luffy stops in front of him with his left palm facing him and his right fist cocked back, still covered in Armament.

"Gomu Gomu no Jet Pistol!" he shouts as the blur of a punch slams into Roman's chest, causing him to cough up a little blood before being sent flying back first into a wall, cratering it. He quickly recovers, but feels immense pain in his chest.

'What was with that punch! The pain shouldn't be this bad since I was using aura.' He thought in confusion. That definitely felt like it cracked one of his ribs. After getting over the pain, he heads toward the ladder that lead to the rooftops. Luffy returns to his normal skin tone and sees him making an escape.

"Ah! Girly Man is trying to get away!" the straw hat boy exclaimed.

Ruby sweatdrops at the nickname for the notorious criminal before looking over to the dust shop and asks the old man that runs it.

"Would you be alright if we chased him down?"

The old man slowly nodded his head, still shaken from the attempted robbery. She nods in confirmation then turns to her cousin.

"Okay, lets go!"

Before they could get close to the ladder, reinforcements entered the scene to the block the way.

"We're gonna lose him at this rate. Luffy, do you think you can-" she was cut off when Luffy walks up to them and exerted his will over them with Haoshoku Haki (Color of the Conqueror King), causing them to fall unconscious with foam in their mouths.

"Nevermind, forget I was asking." She finished in a muttered tone. She was a bit envious of Luffy having such a useful ability available to him. Hardening limbs, brief premonition, sensing other presences like a portable radar, and knocking out people with so much as a glance. He's not even using aura at all.

Upon reaching the side of the building, Ruby shoots herself upward using the recoil to gain enough height to reach the top, while Luffy grabs the ledge by stretching his arm and pulls himself over. When they reached the rooftop, they were greeted by the sight of Roman entering a bullhead that was taking off.

"Oi, get back here and fight like a man, Girly Man!" Luffy shouts over the sounds of the flying vehicle's thrusters.

A tickmark appears on Torchwick's head as he hears the demeaning nickname, but maintains his composure.

"Call it a strategic retreat Straw Hat, maybe you should-" He was cut off by the sound of a sniper round that whizzed by his head by mere inches that belonged to the almost forgotten redhead.

"Well Red, that was rude of you to interrupt. As I was saying, maybe you should BOTH buzz off." Upon threatening them, he pulls out a red dust crystal from his pocket and tosses it at them. While the crystal was in midflight, he shoots another round aiming to hit the object.

The duo see this, as they brace themselves for the upcoming explosion... only not to feel it. They stared in awe of a new arrival that projected a defensive barrier in front them.

Said arrival is a middle aged woman with bright blonde hair tied in a bun, green eyes through a pair of oval shaped glasses, and gives of the aura of the "stern librarian". She wears a white long sleeved dress shirt with a black business skirt, black-brown leggings, a tattered cape with the inside being purple, and a pair of black boots with brown heels.

Ruby couldn't help but give a fangirl squeal at the sight of her.

"OH MY GOSH, that's Glynda Goodwitch, an actual huntress!" Ruby exclaimed in fan-like awe.

It was always her dream to be a great huntress, and now she's in the face of one of great renown. Luffy was just staring out of childish glee at seeing what looks like a magician performing magic tricks.

Torchwick lets out a 'tch' before moving to the cockpit of the bullhead to warn his collaborator.

"Hey, we got a huntress on our tail now!" He informs her as they switch positions, Torchwick at the controls and the mysterious woman to deal with the nuisance.

She comes into view with a red dress that seems to have a bit of a sinister glow, the shadows doing well to hide her face except for her eyes that almost seem like they're on fire. From the side opening of the bullhead staring down on the trio, she generates ball of fire in her hands and shoots it at them, only to be countered by Glynda's use of dust manipulation.

"That Mystery Lady can make fire out of thin air." Luffy mumbles to himself with a heated glare to who he would now dub the Mystery Lady. He doesn't like the fact that someone is using something that resembles Ace's devil fruit for malicious intentions, not wanting it to tarnish the memory of his brother.

The clash between two skilled dust users continues until it finally ended in a stalemate. Glynda then conjures a storm cloud above the bullhead, only for ice shards to fall out of the cloud, buffeting the airborne object. After a few moments of instability from the hailstorm, the Mystery Lady blasts a wave of heat to melt the ice.

Ruby takes the momentary stop of the battle as an opportunity to switch her scythe to its compact form and starts shooting the Mystery Lady, who is blocking the bullets with one hand.

"Luffy, now would be a really good time to use your semblance right about now!" she calls out to her cousin, to which he nodded his head in agreement. She would keep on firing to distract her opponent to give him time to set up the next attack.

Luffy focuses on activating his semblance, the only sign of activation being a blue glow in the form of a tattoo on the back of his right hand. The tattoo itself looked like a pinwheel with a mikan on one of the ends.

"Memory Bond: Navigator"

His pirate crew may not be with him physically, but they're with him in spirit, literally. Luffy's semblance allows him to 'bond' his memories with the memories of one of his crew members. With memories includes knowledge, for when he does this, he gains the knowledge of whatever valuable skills that may be of use to him while maintaining his own battle prowess and personality.

It stems from Luffy's admittance that he would not have lived without the help of his friends, his crew.

The only drawbacks are that he has to constantly use Aura to maintain a link, and he can only link to one member at a time. Plus, once he disconnects the bond, which deactivates the use of his semblance, the information immediately fades out of his mind.

Basically, it made him from a complete idiot in everything not related to using his current abilities to a very versatile adversary, and vice versa.

But since his old world never had aura, there was no way of knowing how to use it, hence the extra training.

It's also one of the few semblances that doesn't necessarily manifest in physical form, but through the mind, making it really difficult to tell if he's using it.

With Nami's knowledge of weather forecasting now in his mind, he takes out his Clima-Tact and presses the button next to the light blue line.

"Cool Ball...Heat Ball" he swings the rod creating a series of bubbles containing cold air and sending it in the air and quickly switches to the red line button to repeat the same action, except creating bubbles filled with heat. The bubbles of hot and cold air come together to make an actual thundercloud over the slightly stable bullhead.

"Thunderbolt Tempo!" he finishes up the storm that he was brewing by switching to use the yellow dust and send a static charge to the cloud.

The result... a bolt of lightning came down upon the surprised escapists, shocking it to the point where one of the thrusters burst into flames and smoke. Glynda was also a bit surprised at the display of creating weather by using dust.

While she just made a cloud to shoot ice shards, he made a legitimate cloud through natural process along with causing a lightning strike.

Meanwhile, Torchwick gritted his teeth in agitation, trying to keep the hunk of metal in the sky. The Mystery Lady was glaring at the troublesome kid and decides to launch an enormous fire ball at the rooftop. Glynda, Ruby, and Luffy jumped back to avoid the explosion that covered most of the roof.

This gave them enough time to stabilize the bullhead and took off before the trio can resume their assault.

"Damn, they got away." the raven haired teen said as he deactivates his semblance and watches the robbers make their escape. He would chase them down, but he didn't want to leave Ruby behind. Speaking of which...

"Can I have your autograph?" She says in cheerful glee asking a full fledged huntress for a signature.

Glynda just stares at the two and sternly tells them "Both of you will be coming with me!"

Ruby flinched at the tone that left no room for argument. Suddenly, Luffy had a question of his own.

"Can we go eat first? I'm so hungry!" he asks in a pleading tone, only to be given answer in the form of Ruby's facepalm and Glynda's scowl for his short attention span.

End of Chapter

How did you like the chapter? What do think of Luffy's Semblance? Please leave reviews for feedback, as this is my first story ever.

As far as pairings, I have a one-sided pairing in mind, but I can't make up my mind as to who.

Updated as of November 7, 2016 : After considering how random he got his devil fruit the first time I wrote this chapter, I decided to revise the idea by including an unnamed character which would affect other chapters that bring up this topic.

Will it still be random? Maybe... but this is simply an attempt to be rid of some of the randomness behind a present.