Kingdom Hearts: Ninja Flash

by verifiaman

(KH1 AU, Pre Keyblade Sora) had always wanted to see the world outside the Destiny Islands, to be an adventurer, like the many fictional characters he loved. He just never expected his wish to result in his life being upturned. trapped in a new world, he must rely on new friends who find him far too familiar. Warning: ,yuri and ecchi! RyoubiXRyouna, RyounaXSora!

1. Prologue part 1: Dive into a new world

So this is someting I got inspired into doing based on this fic

s/12759190/1/Shinobi-Transformation

A story where one of the ninja girls is a mentor to the crossover character!

Main Pairings:

RyoubiXRyouna

RyounaXSora

SoraXKairi

ARC 1 Start!

It was a silly looking sword, an 8 year old Ryoubi realized. She didn't know where Ryo-nee got it, but it was mesmerizing..

The handle was in the shape of an angel, the grip the angel's waist, and the hilt in the shape of it's wings. The blade was shaped like a cruciform key, a beautiful pure white that seemed to shine in the night sky. It was simultaneously the coolest and dumbest thing she had ever seen.

"It's called a Keyblade." Her older sister Ryoki said as she let her siblings touch it. "A powerful weapon!"

"Ryo-nee it doesn't look very powerful." Ryouna complained. "It looks more like a toy! It couldn't even break my skin I bet!"

Ryoki just stared at her while Ryoubi hit the blonde on the head. Both of them ignored what came out of the blonde's mouth and hoped she'd grow out of it. "Now I want you two to listen very closely. This is something only you can do, because I trust you above all else. Closer your eyes and don't open them...

SKSKSKSKSKSK

Ryoubi woke up groggily, pushing her older and bustier sister off of her and onto the floor. She waited until Ryouna got her morning masochistic ramblings out of the way before getting her attention. "I had the dream again."

"Huh?" Ryouna got up and looked at her sister. "We get dirty dreams all the time sis."

"Not that type of dream. It was of the you-know what?"

Immediately any form of perversion in Ryouna left, replaced with a seriousness that was better put on anyone but her. "The one where you could hear her thoughts and see the parts neither of us were there for?"

"Yeah. I remembered more of it this Sora guy Ryo-nee-sama kept talking about? He's here."

"Sora-nii?!" Ryouna nearly shouted. "Are you sure?"

"Yeah." Oh please let that idiot have a brain after all these years. "It'll be nice to see someone from our family again. Plus if he's still as dumb as usual, we could trick him in getting revenge for Ryoubi-nee." Speaking of vengeance... "Did that creep offer one of his insect things?"

"Nope!" Ryouna answered cheerfully. "We're completely unimportant and under the radar!"

"Good." How anyone could miss those giant disgusting things on their faces was beyond Ryoubi. "We just have to ignore Kurokage's daughters for a while and head to Suneyama Town. That's where she said he'd be. Hopefully we can get him before that bastard does." He already got Yumi and the others, and with how fearful he became at the mention of the word Keyblade, that dorky looking Sora kid was their only chance at saving Gessen from that monster.

SKSKSKSKSK

For as long as he was a Shinobi, Kurokage dreamt of that mighty weapon. It came in many shapes and sizes, but it had one consistent theme to it's design: It was shaped like a key. Sometimes it was shaped like a car key, sometimes it was shaped like a door key, or even a card key, but it always did the same exact thing each time, and going under the same name: The Keyblade.

It haunted his dreams, night after night in one fashion or another. He could feel it's power, it's purity, it's light, always out of his reach, far from his grasp. When he slept, it was his obsession, his life, as if he knew he was destined for it. When he woke, it was barely in the forefront of his mind, relegated to studies in the little free time he had. Day after day, year after year, all of his searches for anything relegated to the Keyblade, obsessed in his dreams, barely a care in real life. And now, as he was dying in his bed, the dreams became mixed with reality. His precious daughters became extensions of his will, taking on his worst traits while they thought they were making him proud. There was something wrong, oh so very wrong, as if destiny itself had taken a different path. He could do nothing, he could not say anything, too weak physically and mentally to even make a single protest, not that they'd care thanks to that man.

"Gram-gram's getting kinda senile!" Was what Minori would probably say, getting the terminology wrong.

"He's like getting dementia or something?" Was what Shiki would follow up with.

"We should put him out of his misery." Would be what Murakumo would say, with or without the mask.

"It would be the honorable thing to let him die." That he heard Yumi say. 'We should be the ones to put him out of his misery.'

'I don't want my family to suffer anymore.' Yozakura would reason. 'Let's be quick about it!'

His daughters were corrupted; by what he didn't know, but they were going down the path of evil against their will, and yet when they came to discuss euthanizing him...they stopped.

"What are we doing?"

"WE'RE REALLY BAD PEOPLE!"

"I'm gonna...ughh I feel grodie..."

Whatever that monster did to them, being around him stopped it. He was literally their last hope of salvation...and yet he could do nothing except hope, hope that someone would save his daughters, bring them back from the darkness, and stop him.

Unbeknownst to him however, said man was standing above him, his tattered cloak obscuring even the slightest detail of his body despite the numerous holes in it, save for two glowing blue eyes. "It is you who called the Keyblade bearer here it seems." Of all the people who could have called that idiot with his stupid shoes, it was the extremist. It'd be quite funny if he could process the emotion, but alas, there was no one around. There was still one good thing: the boy wasn't at his prime. No friends, no allies, and no magic. All he had was a giant stick he didn't know how to use. "I'll leave your daughters and those disturbing sisters be for now, Kurokage. I have a list I need to start crossing out." Now who to get to first? Hanzo? The time displaced boy? Or his old pal's sisters, who coincidentally were staying at this very school? Recalling his past experiences, he decided to leave the boy alone for now, and as for the twins...

"Watch them. Follow them." With those words a random Emblem Heartless had formed and began shadowing the Ryo sisters. They knew more then they were letting on, and subtlety was not a trait anyone in their family shared.

For those who were spiritually aware, Mitsuyoshi City was considered a dead zone. Those who could interact with the departed even in the slightest would feel sick and feeble within a few days of staying in the city's borders, and anyone else would die in the same amount of time. Even Shinobi were not immune to this city's deadly effects, as the stronger you were, like on the level of the Super Ninja Hanzo, the quicker this city would kill you. As a result, Mitsuyoshi had oddly become a...neutral zone of sorts.

Now granted, neutral in this case was like the Crips and the Bloods trying to get along in a crowded place, but given that only the weak could stay here, it was quite easy to prevent killings and assassinations. They still happened, but it was easy to prevent them, helped by the near scarcity of metals and fabrics that protected one from the city's was the heart of the Tokyo area's Shinobi, where the illicit dealings of both sides went undisturbed, from gambling and organ trading, to just the general business side of things. You could find a lot of dirty secrets in Mitsuyoshi City, and woe be it the poor civilian who found themselves in here.

And for Hanzo, a poor hapless civilian is just what he found. Clad in a thick gas mask around his nose with his mouth covered by a nozzle that was attached to a giant gas tank on his back, the legendary Shinobi watched the boy run for his life from three high school Shinobi, who, like all good ninja, dressed very skimpily and with an animal theme. The young boy in contrast, was dressed like a buffoon. He wore a red jumpsuit that ended in puffy shorts with a long zipper running down the middle, along with a side pocket on the side with a crown-chain dangling from it. Separating the shorts and jumpsuit parts was a large blue belt that served no function. Hanzo figured the kid thought it looked cool, which explained everything about how he dressed. Over the jumpsuit, he wore a black and white hoodie with white sleeves ending in grey edging. The zipper was in the shape of a silver crown, and the hoodie was kept unzipped at all times, though why he even wore that was a mystery. On his hands the boy wore white gloves with blue, black and yellow straps. And then there were his shoes. Good lord his shoes. They were yellow and black with belt straps of all things in place of shoelaces, or even Velcro!

And then there was his weapon, the primary reason he was called here. "The Kingdom Key." To think it bonded to someone so young! And it was probably the only thing keeping him from falling over from exhaustion! He could see the bags under the boy's eyes his breathing haggard and his gait slow and sluggish. The Keyblade was supplying him with magic to keep his body from failing, though sadly it looks as though even it would fail. "How very curious." He took a look at the display on the left eyehole of his mask. "Twenty minutes of air left..." He muttered. He'd better get the kid out of there and fast, before he pissed off the wrong party!

SKSKSKSKSK

"Foood...need foooood." Sora mumbled as he instinctively took out more of the naughty word ladies. He didn't even know how he did it either; he couldn' tmanage three hits with this giant thing before his arms got sore!

Two more of naughty word ladies with their giant boingy bits in feathers, fur and scakes came flying down at him. Irritated, the young boy used them as a jumping pad, landing on the head of one and the nose of the other before landing on a rooftop, the impact causing both girls to fall into an alleyway screaming. "These...these guys...suck." Then again he shouldn't be pointing fingers. They'd have probably killed him like, a jillion times over if he didn't have this giant key thing!

Panting, Sora took a look around and saw he was in the clear. "Finally!" He dropped the giant key thing on the floor and fell over, breathing heavily and rubbing his empty, growling stomach. "Soooooo huuuungggryy..." He hadn't drunk or eaten anything in four days, and now he was starting to reap the consequences. It didn't take him long to find out the key thing was making his hunger go away for a while, but it seemed even it had it's limits. 'I can't keep this up much longer.' He thought as memories of his mom, Riku and Kairi flashed through his mind. 'I'm gonna die before I find anyone or even get home!' Maybe some rest would do him some good...

But before he could let exhaustion take him, three very angry sounding naughty ladies, one dressed as a bat, the other a cat, and the other a crocodile or alligator, stood over him. "Oh noooooo..." He mumbled weakly as the cat picked him up.

"You little bastard!" She yelled, her proximity making him wince. "Four days of leading us around, and it was all because of some kids whose balls haven't even dropped?!"

"I'm...13..." Sora mumbled pitifully.

"With your height?" Cat said with a scoff as Crocodile went to the giant key weapon and picked it up. "Please. So, where you from? You're obviously not Aku or Zennin."

Crocodile let out a 'yeah!' as she inspected the key weapon, throwing it to the ground due to it's weight. "Tell me about it! He's almost like that new Kagan clan brat that just rolled up in Hanzo! They both have that stupid 'out of their depth look to them!"

"Still, the fact a boy of all things managed to stay in this city for so long is quite impressive." Bat began, Sora watching as she reached into her chest and pulled out a scroll that was way too big to have fit in there. "And then there's that little giant club of yours. Looks like I'm gonna have to dive into your brain to see what you're all about."

"How did you do that naughty lady?" Sora asked dazedly, his vision blackening as he showed an incredibly lack of priorities, something anyone who knew him would quickly get used to. "Is your chest a clown car?" All three women just stared at him before Bat unfurled the scroll, Cat holding him out as the former wrapped the paper around him "Ooooohohohoo." He didn't feel so good... "What's going on?" And who was the guy in the gas mask behind them?

"Yeah, like we're telling you kid." Cat grumbled, not seeing the tall, masked man towering above her ally. "Just shut up and-" The three were then knocked out, the man not laying a single finger on them.

Sora fell to the floor. "OW!" He rubbed his butt, the pain giving him a moment of clarity as he stared up at the man. "Who're you?" Was all he could say before he passed out from hunger.

Hanzo picked up the unconscious boy and attached the Keyblade to his air tank, the weapon sticking to it. 'Mana depletion.' His MP was at 12, and his max MP was at 240. That wasn't even enough to do more than one Ara or Aga class spell, and he didn't even have any magic listed! 'Now how did an untrained child find his way here?I was pretty sure Kurokage locked the Keyhole.' He could find out later; now was the time to get out of here!

With a leap, hop, jump, and run he had taken the kid far outside the city limits, stopping next to a creek beneath a highway. It was surrounded by a large forest, below a steep, steep, rocky hill. All the traps were carefully avoided, and for added protection he had masked his and the boy's auras, the Kingdom Key doing the same once it sensed his intentions. "It's a good thing I found you." And it was a good thing those Shinobi were so pathetic. Then again if they had any skill, they would've been dead or sick without protection. His mask and tank disappeared in a puff of smoke, leaving him in a skintight black wetsuit. "500,000 Yen wasted." A perfectly good wetsuit bought for the sole purpose of giving his wife some good old loving, both her forms, to show how much he missed her. And now he couldn't even do that, because some idiot opened the world to the Heartless!

Hanzo took a deep breath to calm himself. 'There'll be time for interchronal nookie later. The boy comes first.' He held out his hand and closed his eyes. "Hanaoka Hideyo." translucent leaves enveloped his hands, forming a long, blade-like shape before burning to ash. In their place was a Keyblade, longer and thicker than the one on his back. . It was a shaped like a tubular key, the handle bright green and both it and the grip shaped like the plunger of a medical needle. The blade was circular in shape, with measurement markers going from the hub to the grip, a bright green liquid bubbling inside the barrel, lighting the around them oh so slightly. A thin, sharp needle was hidden inside the top of the Keyblade, retractable, deadly, and barely used since the 50s. With a simple thought, the needle shot out like a cat's claw, extended to it's maximum length.

"It's been a long time since I bought you out old friend." He could feel it's power, it's strength. It wasn't much, given what it excelled at, but for what it did, it was the best in the field. He held the Keyblade over the young boy and closed his eyes. "Let's see if I still got it. OSMO-"

LIBRA SCAN IN PROGRESS! LIBRA SCAN IN PROGRESS!

As he saw what exactly was scanning the area, he quickly recalled his Keyblade, opting instead to perform a series of handsigns, 4 in total. "Dog,Boar,Ram, Serpent!" A blue glow enveloped the two and the boy's Keyblade, Hanzo grabbing them and jumping into the creek. 'What are one of those creatures doing here?!'

SKSKSKSKSKSK

Scan Complete. No immediate results found.

Keyblade found in vicinity. 222MP Wasted.

[RESULTS LOCKED]

"Impossible." The cloaked figure muttered as he stared at Mitsuyoshi City in the distance. Cars and trucks passed through him as he wasn't there, the drivers not even seeing him. "The child landed here of all places." Even with his newfound power A shinobi of his calibre couldn't even approach the city without protection, and he didn't have the skill to shield himself! Luckily he had something prepared just in case he had business in these dead zones. And one of them was just itching for action. "See you tonight, Keyblade Wielder."

SKSKSKSKSKSK

It was a good hour when the mysterious presence left, but Hanzo cautiously waited longer before he and the child surfaced. With a few hand signs the two of them were dried off, the boy's hair humorously going back to it's spiky style. Hanzo picked up the boy, attaching him and the Keyblade to his back before running out from under the bridge and up the hill, fast enough so that any passerby would think their eyes were playing tricks on him, and slow enough to keep the boy safe. Because of this, it took five minutes for him to get to the top of the hill instead of the two it normally would.

He jumped on a passing car and then to an adjacent one, then another in the opposite lane heading away from the city. Within the few seconds he was in the air, he had performed the hand signs necessary for a stealth jutsu, he and his passenger had become invisible to the naked eye. "Three months , and now a Keyblade Wielder with a Nobody hiding under our noses..." What he wouldn't give for Kurokage's help, but he shed the life of the Wielder long ago. Bringing out Hanaoka Hideyo with that thing in the vicinity wasn't an option, so with no other options, he decided to wait, and hope the Nobody didn't track his Keyblade's energy signature back to his current destination.

SKSKSKSKSK

The sun had set by the time the Ryo sisters got to Suneyama Town.

"Urghhhh..." Ryoubi groaned as her and her sister got out of their cab, clad in their Gessen Academy uniforms. "So tired..."

"This sucks." Ryouna growled, cranky and sleepy. "Let's get a hotel, preferably something ritzy and clean."

Ryoubi nodded in agreement, too tired from the running and the cross country ride to indulge in their usual tendencies. Exhaustion was the enemy of people like them, and for someone like Ryouna, it hit harder than ever. "I already set us up at a hotel nearby." She pointed to the tallest building in town, a simple, beige colored building. "Lots of ritzy shit in there." Plus it was owned by another Keyblade Wielder they knew all too well. "Let's get going. The sooner we get there, the sooner we can start rebuilding our family."

"Yep!" Ryouna said, staring at the building like it was an oasis. "Let's go!"

The trip was uneventful. Tired as they were they were above the standard human limits, so the walk was pretty short despite taking an hour and a half, which would be absolute torture if they were normal girls. Suneyama Town was an urban jungle, filled with more businesses than homes. Steel mills and blacksmiths were on every street corner, and in every shadow were very very powerful ninjas that could end the two sisters if they so much as made a wrong move. It was why they took a cab here instead of the much faster running.

But alas, their quiet time came to an end. Every town has it's thugs, and it looked like Suneyama's were on the prowl for some tail. The sisters looked at each other irritably before Ryoubi spoke up. "We like girls, fuck off and go away."

The lead thug, a fat bastard if there ever was one, was momentarily surprised by the girl's attitude before regaining his unearned bravado. "Don't worry little ladies; we'll straighten you out."

Ryouna looked down at her sister. "I'll take care of this, go on."

"Fine by me." Ryoubi waved her sister off as she casually walked by the thugs.

"Did that bitch just...?" The fat thug's fists clenched as he turned to the hot blonde with the big tits. "Ohohoho no bitch ignores me! Come on slut! We're gonna have some fun!"

Ryoubi got to the corner when Ryouna caught up to her, not a speck of dirt on her or wrinkle to be found. "That was fast."

"Family and rest comes before Ryouna-chan's pleasure." Was all the blonde said. Man it was so weird hearing her sister so serious, especially with that voice! "By the way, I saw someone while I was using one of those guys as a pole to give the other a wedgie. I think it was Hanzo."

"And? Look, it isn't Wang-Pai or someone important." Ryoubi said, both sisters unaware of the presence that had shadowed them since they left. "He's probably tit hunting or something. As long as we don't do anything stupid, he'll ignore us."

"Oh. Ok then." Ryouna let out a yawn as the two crossed the street. "What are you gonna say to Sora-nii?" She asked her sister. "I'm gonna punch him in the face, kick him in the nuts, then give him the biggest hug of my life!"

"Lightweight." Ryoubi said as they got onto the sidewalk. "I'm gonna kick his ass so hard he'll be too scared to leave us again!"

"Yeah..." The two sisters let out a laugh. It was a fantasy of course. Hurting the idiot was like hurting a puppy, and even if they did, that puppy could do so many awful, awful things to them. With their spirits brightened, the two continued their walk, unaware that this night would change everything.

Meanwhile on a street lamp, Hanzo watched the two siblings. 'Things are moving faster than I expected.' He hadn't been at Gessen for the longest time, and he had an entire speech planned to brief those two on their sister! What the were doing here, he didn't know, but given they came here unabated, that meant their transfers to Hebijo weren't finalized. That didn't the extra darkness he was sensing from them though, but that was fixable. He summoned his Keyblade and waited until they were just about to enter the building. "Barrier." The darkness following them stopped in it's tracks. "Just like I thought." Barrier in it's purest, weakest state only stopped beings of pure, utter evil. A youma could think, could have thoughts outside of it's base instincts, so it wouldn't work on them. It would however, work on the Heartless.

"Mmmmrnnn." So the boy was waking up. Time to get him someplace safe and deal with the Heartless. If it was a human or Youma following those girls he could easily have killed them from here, but as Kurokage said so many times, his Keyblade sucked against the stronger Emblem Heartless. Thankfully he did have somewhere safe to put him, and two lovely young ladies who would protect him with their lives. With how much they talk about their sister in private, they surely wouldn't want one of the biggest clues they had to her whereabouts die on them?

SKSKSKSKSK

"Here are your keys mam. Your room service call number is 555-333-2."

"Thanks Ryoubi mumbled as she and her sister got onto the elevator. For a second the brunette could swear she saw some inky black thing staring directly at her and Ryouna, but she chalked it up to being tired. No way a Youma was getting into this city!