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matramancer · 26 days

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Hoshina Soshiro with a Shinobu like! reader🦋

🦋Synopsis: Amongst the 3rd Division Officers lies one of the JAKDF's most unique fighter's--a swordswoman who fights kaiju with poison.

mitsuri! reader

🦋Tags: shinobu! reader, kny crossover, friends to pining, hoshina soshiro x reader, mostly fluff with slight angst in beginning and end, fem! reader, no beta we die like kanae

“If my combat level was just a bit higher, could I have killed that kaiju?”

That was the thought that rang through your head for years, from the moment you held your dying sister in your hands, to the times where you found yourself alone in your research lab, craning a vial of poison between your fingers.

The world’s first anti-kaiju poison.

You really didn’t know how exactly you qualified enough for the Defense Force. When you enrolled with your sister, you figured that she’d be the only one eligible to enter. Your body was smaller, and your combat power was low. You could barely wield a gun properly.

But throughout your weaknesses lies your hidden strength. You were exceptionally intelligent, using your ingenuity to focus your energy on other aspects of yourself you were keen on.

Despite your blatant hatred of them, you studied kaiju immensely, and turned to insects amongst other creatures as a base of study. Many, many kaiju shared similarities with a common animal counterpart. Science never lied, and if there was one way you could make up for your lack of manpower, it was your understanding. There were things you could do.

Your captain started to notice how intuitive you were–eventually landing you a spot in the research team.

You were content on not being dispatched or not being in the front lines as much, taking the opportunity you had gratefully nonetheless. You were still part of the action, and you got to observe specimens more closely. You even made friends with another officer, Hoshina Soshiro.

Hoshina and you had a unique bond, one riddled with understanding and mutual respect. Hell, the two of you go back a long way–you were actually batchmates. He was there when you got frustrated over your low combat scores after your shooting assessment, your older sister sporting a much kinder smile in contrast to your fuming face.

(He’s a bit reminded of himself and his brother)

He understands that feeling of being underestimated, of being swept under the rug. He knows most about how your small size can get under your skin. He shares that frustration of not being enough, not with a gun. Not with what the Defense Force expects of the two of you.

The two of you became fast comrades in arms, as you came to understand Hoshina’s own battles throughout his entire life. You encouraged each other to move forward, even vouching for his swordsmanship.

Similarly, if it weren’t for Hoshina noticing how nimble and swift you were, you probably wouldn’t have believed in your abilities a lot sooner. Although your combat level for shooting was low, you were definitely exceptional in terms of maneuvers.

Though Hoshina pushed himself to further be recognized for his talents and exceptional skill, something you actively encouraged, you initially stood in the backlines with your much smaller role. You were content with being behind your sister and everyone else, even as you secretly envied them. Feeling so much envy over how much bigger and stronger everyone’s backs were as they moved forward, that it made your chest hurt sometimes.

But when you lost your sister, everything changed.

Hoshina saw how it broke you. You were always quite temperamental–brash to him, even. Always so hot headed in contrast to your sister. But now, your anger has gone cold. Your hatred for kaiju turned into prickling ice, and on the times Hoshina caught you slipping off your facade, your immense hatred was so strong that the veins in your face seemed close to popping.

your resolve changed. You were to fight, to put your life on the line in any way you could. You threw yourself in your research, and for a certain period of time, only Hoshina was able to get through to you.

Then, one day, you emerged from your lab with something that could change the world..

You held in your hands the world’s first lethal anti kaiju poison. And you had every intention to test it out yourself. You had thrown yourself into the field, implementing an entirely new outlet of kaiju extermination all by yourself. For that, you were admirable.

And as kaiju poison was still a very new and experimental invention—your invention—you were the only front liner allowed to wield it.

You spent a great deal of time honing your skills with Hoshina–if you were to fight on the frontlines with this poison as your main weapon, then you were going to do it right. With half the physical strength your fellow officers had, you’d train four times as hard to make up for it. And if there was no stopping you, then Hoshina swore that he’d be there every step of the way, just as you did for him.

Your style of fighting was unique amongst the Defense Force, your high agility and field expertise a key cornerstone in your combat style. Where your combat level in gunmanship was low, similar to Hoshina, you held potential with swordsmanship.

Although you were aggrieved over your physique yet again being a hindrance (you just couldn’t compare your swinging strength to Hoshina’s), you were particularly adept in delivering forward thrusts and piercing motions. Perfect for injecting poison.

It fits you, Hoshina notes. You were never one for brute force.

The man always had a kick seeing the flabbergasted faces of the new recruits during their first time seeing you on the field. It’s something he looks forward to with a certain pride.

Afterall, you‘ve been with each other since the very beginning. When the Defense Force told you both to just quit. When the both of you just kept biting back, fighting for a spot to prove your existence. When you looked at him with so much pride in your eyes, congratulating him for securing his spot as vice captain. When he attached himself to your hip even in your lab, up until being the person standing right next to you when you received honors as well as your promotion.

Though you and Hoshina fought valiantly for your own battles, the other was always there to push the other forward when things felt too stifling.

So he couldn’t help but burst out the biggest smiles whenever he hears that you’re joining the frontlines on a mission with him again—this time, it would be your first mission with the newbies.

It was a silent night before a swarm of spider-like yoju invaded a part of the city, opting for an immediate dispatch of the 3rd Division. Whilst Captain Ashiro was to deal with the Honju, the many, many hordes of yoju required quite a bit of manpower in the frontlines due to its sheer numbers.

That was how Reno and Iharu found themselves cornered, the spider yoju proving to be a much trickier threat than expected. The darkness proved to be another hurdle—it made the dark colored yoju harder to spot. If they didn’t act fast, the swarm would overtake them…

“Iharu! I’ll fire rounds and give you cover! You hurry and call backup!” Reno keeps his shots steady, keeping the horde at bay.

Iharu immediately quips back, firing his own gun. “Hah?! No way am I leaving you—ugh!” He winces, narrowly dodging an attack. Things weren’t looking good, the swarm was imminent.

“HURRY, IHARU! WE’LL BOTH HAVE A BETTER CHANCE WITH REINFORCEMENTS!”

“—Oh my, so you’re the one who’s been firing freeze rounds.”

The two boys froze, goosebumps forming on Reno's skin in particular as the boy felt a sudden presence already by his side. Who— when did you—?!

With as little as a blink of an eye passing, the two boys watched with wide eyes as you nimbly dodged a group of spiders heading your way, as if you fluttered through the air.

Flabbergasted, Reno and Iharu watched as you made it through the infested street in record time, not letting a single yoju touch you. “So fast!”

“Heads up boys,” Hoshina chuckles, speaking into the comms. You had made it to Ichikawa’s position. “Watch your superior closely.”

You stayed so calm and collected, even when the situation seemed dire. Your presence on the battlefield was admirable. “Yoju behavior confirmed. Despite resembling arachnids, every cluster consists of a head yoju similar to the behavior of social insects.” You calmly spoke into your comms, withdrawing your sword. “Prioritize on taking out the mother.”

Reno couldn’t help but marvel at your sword—it was in a shape that he’d never seen before. Were you like the vice captain? But there was no way you could slash through anything with that…

Iharu’s eyes widened as a stray spider tried to sneak up behind you, promptly yelling at you. “WATCH OUT!”

Mid sentence, Iharu realizes that you had already lept to the air once again, and in the blink of an eye with unfathomable speed, you shifted through the yoju, leaving stinging pierces through the hoard.

“Butterfly Dance: Caprice.”

The two boys watched on in awe. It all happened so fast—but wait, none of the kaiju’s bodies or limbs seem severed?

It was silent, Reno and Iharu still catching their breaths as they scanned the vicinity. The kaiju were intact, but they weren’t moving. “Eliminating a kaiju doesn’t necessarily mean shooting or slashing it down.”

Your voice dropped to a sudden chill. “…Because there are swordswomen like me who use poison.”

As you finished your sentence, the two boys watched in awe as all of the yoju you hit crumbled to the ground, writhing in pain as their bodies shriveled. Then, they all dropped dead. The danger zone had been cleared.

Reno and Iharu watched as you spun your sword in circles, cleaning off the blood from the yoju before moving to face them. “Defense Force Division 3 Head of Research—(L/N) (Y/N),” you smiled, finally introducing yourself. “It’s nice to meet you, new recruits.”

You earned a place for yourself right alongside Hoshina as another remarkable swordsman in the 3rd Division. Your contributions to kaiju warfare were not only quickly making waves, but beckoning your presence in the field of bioweapons.

To be frank, it was a bit daunting, but if it gave you any chance to get closer to vanquishing the kaiju, you’d keep working hard.

Nowadays, only Hoshina knows of your prior disposition before your jovial, more easygoing front today. How you had morphed a new smile and attitude, akin to your sister’s. According to Hoshina, although your face was tranquil and soft, your eyes held full bloodlust, a desire of vengeance. A show of your actual temperament.

The only person you’ve really let your guard down around since losing your sister was him and him alone. He’s your closest confidant.

In addition to being the head of research, you oversaw the medical bay of the 3rd Division sometimes. After all, you did also carry medical expertise.

Perhaps the motivation behind that was from your sense of responsibility, as well as this small tug in your head that tells you to take good care of the division Hoshina was entrusted with.

Despite your kindhearted demeanor however, everyone knows not to trifle with you, especially when it comes to medical manners. No one under the 3rd Division has ever “forced themselves” to train before being fully healed ever since you started overseeing them.

Mina Ashiro herself testified to it. “Never again,” she states, not after experiencing your temper.

Well, whatever keeps the division healthy!

Hoshina enjoys crashing into your lab from time to time. He’s your most frequent visitor, to the point where you have a mug and some throw pillows on the couch reserved for him. He was like a cat going in and out.

“(Y/N)~” “Everywhere I go, I hear his voice.” “Oi, I’m right here.”

"..." When he feels your aura darken, he immediately shuts up and sits politely.

“(Y/N)~~ let’s go outside and train.” “It’s raining.” “Then let’s train inside.”

No matter how naggy and clingy he became however, you always keep him close. Because that’s how he shows how he cares.

“I know you’re there–” You don’t turn around from your seat, before a cold sensation on your cheek elicits a gasp out your mouth and forces you to turn back. You’re met with a bag filled with some warm takeout, and two cans of coffee.

Balancing everything on his hands was Hoshina Soshiro, grinning all the while. Your expression softens. “--Soshiro.”

“Missed you at lunch,” he starts. “Pity. All the new recruits were asking about you. guess I have you all to myself right now though.” You don’t know if he’s joking or not, but his tone shifted a bit into territory that felt more intimate.

These were really small efforts from Hoshina that you knew all too well, making sure you didn’t hole yourself up in your lab. And you always appreciate him and all he's done.

Now, let’s talk about the elephant in the room. You meeting Kafka as Kaiju No. 8 did NOT go smoothly.

Your strong hatred for kaiju ran deep, and Hoshina knew that. Your entire life’s work revolved around that. So when the entire debacle with Kafka happened while you were off base during the attack, Hoshina mentally prepared himself for the havoc that was to come.

The definition of “Don’t freak out when I tell you, but……”

Spoiler, of course you found out. And quick. You were the 3rd Division’s head of research who specialized in kaijus–of course you would know. In fact, On your rush to the 3rd Division’s base, you were immediately ushered to study him in captivity.

Like that was a good impression you’d give to someone who developed the world’s first and most lethal kaiju poison!

“(Y/N),” Hoshina calls out to you, throwing formalities aside. His eyes shifted to your hands, seeing your knuckles grow white, veins visible. “I know what you’re thinking.”

Calm down. “--Soshiro.” You replied, coldly. Hoshina holds a breath at that. He knew you would let your logic and rational thought prevail, but the hatred in you ran so deep, you could slip into a near constant state of anger if you let it get to you.

A new sensation enters your hand. It’s Soshiro’s, you realize, tugging on your own as if to ground you. He hopes it helps bring you back to reality. “I’m here–the 3rd Division is. We all wouldn’t be here if he wasn’t on our side. He saved us, (Y/N).” His gaze and yours meet. “He saved me.”

Luckily (and very thankfully, Hoshina would add on), you grew to become more understanding of Kafka’s disposition, and set aside your antagonistic views as you slowly opened your heart. You even properly thanked him for protecting the 3rd Division.

In fact, you’re quite compassionate with the man now. You check up on Kafka as often as you could, even providing him the fastest updates of any developments you had on his case. He’s also a great talker, you note, and the two of you even start doing catch up sessions over whatever recent developments have happened over tea whenever it was time for his check ups.

Hoshina feels a bit jealous that he’s no longer the only token visitor of your lab, not that he’ll ever admit it.

With the stakes of no. 9 rising, you knew that the situation would only get more and more dire. You’ve been getting busier days both in and out of the lab, studying samples of the recent high magnitude specimens and observing any abnormalities in kaiju behavior.

The hypothesis and predictions you’ve marked up however, don’t sound an ounce reassuring. A high class disaster seemed imminent, and when the time comes, you fear that your poison might not be enough.

Not with your sword alone, at least.

On one particular late night in your lab, you glance towards Hoshina. For once, the two of you were silent. You had finished for the night, whilst Hoshina probably popped in to check on you after a midnight session of image training. No kaiju attacks, no sirens, just the night sky ever present through your large windows. “Soshiro,” your voice immediately catches his attention, his full focus now on you. “Could you promise me something?”

“Should there be a kaiju–a strong one, and we aren’t able to defeat it,” his eyes widened, the grin on his face gone. “Could you finish the job?”

You let your words stay in the air, your eyes long downturned to the research papers on your desk. You escaped his distraught gaze, attempting to focus on the reports strewn about before they fly out of your vision, Soshiro’s entire being clouding your senses in their place.

The sight of his deep maroon irises caught your breath, and you quickly realized that Soshiro is being completely serious with you right now. He let out a silent plea, with both his eyes and his soul. “Please. Please don’t say that with that face.”

That night, as he held you close, you’re both reminded of the bond that ran tight between the two of you, a bond so strong after everything that you’ve been through together. Something that was forged through pain and joy alike. An innate force that was proof of how the two of you had become so important to each other. It spoke of the same thing,

“I can’t afford to lose you/I can’t afford to lose you too.”

A/N: Whew... thank you to those who enjoyed my mitsuri post !!!! mitsuri and shinobu are my absolute favs in kny, and it was rlly fun to write them into kaiju no. 8--i'd love to do more in the future.