Kimetsu No Yaiba Fic - Tumblr Posts

can you Write a scenario in demon slayer on how each character would react if y/n had the ability to use her rare blood type to fully turn anyone back to human. How would each hashira react in this situation at the hashira meeting by ubuyashiki. And what would be there plans be for her? This is also including muzan as at some point a demon will report of this new finding.

Alright! This is the first kind of ask I've received like this. I'm not sure how well it's going to go, lol, but I'm going to do my best! Thanks for asking and I hope you like it! (I haven't written for them in a while so please lmk what you think)

Rating: T Pairings: None (mention of canon pairings) Warnings: Death threats (from Muzan), slight swearing. Suggested consensual experimentation? Unbeta'd Also, there are references to canon backstories but no major details

Before the Meeting:

You stand to the side, waiting. 

You hadn’t entirely planned for your ability to be revealed, you didn’t even know it existed until the attack, but after the demon and its sudden and confusing transformation, you couldn’t ignore what happened. You couldn’t ignore that they needed help. 

One of the demon slayers who found you in the aftermath brought you to meet the Ubuyashiki family and the leader of the Slayers. In that meeting, you learned everything and he reveals to you that you had the potential to change the world in their favour. As terrifying as it is, you could save people. The Ubuyashiki’s look at you as if you’re a saviour. Honestly? You have no clue what you’re doing. 

That doesn’t stop him from calling a meeting of the Hashira, the strongest slayers of their time. If anyone is going to help you achieve this new goal of theirs, it’s them. So you wait, trying not to fidget in your nervousness as you feel their gazes on you before Ubuyashiki arrives.

The Reactions:

Sanemi

It’s strange for them to be called this soon and he hasn’t taken his eyes off of you. You’re a stranger and despite knowing you could only be here with permission. He doesn’t trust it but he waits. He’ll hear it from the master himself. 

You’re introduced and honestly? He’s confused. It’s not possible. It shouldn’t be possible and if it was anyone except the Master, he wouldn’t believe it. He still doesn’t believe it. 

“Not that I am doubting you, Master,” he calls out. “But you can’t expect us to believe this without proof.” 

“Of course, I wouldn’t, my children, but I do ask that you trust me. Their abilities have been seen by multiple slayers in the incident it was revealed.” 

“Tch,” he mutters but he nods. 

It’s fine. He’ll keep an eye on them. Maybe if their blood actually works, they can get rid of Muzan and Genya will finally be fucking safe.

Shinobu

Shinobu is aware of the stranger but isn’t concerned. You wouldn’t be here unless you served a purpose and when you’re finally introduced, she’s fascinated. 

There’s never been a recorded case of someone with the ability to transform a demon into a human, the complete opposite of Muzan and his creatures' abilities. It’s fascinating and the first thing she’s going to do once this meeting is over is make sure you return with her to the Butterfly Mansion. She needs to compare your blood to a regular human's and see if there is any difference. There has to be a way to measure the ability. 

She wonders if Wisteria would have any effect on you and she’s already calculating the tests she can do. As Master Ubuyashiki replies to Sanemi, it occurs to her…could your blood help him? Could it stop the illness or remove it completely? She needs to look into this. 

Tengen

“How flashy!” 

Tengen has never heard of anything like your ability in his life, but he can’t wait to see it in action. He knows it’s bound to be spectacular. He can hear the way your heartbeat increases the longer you stand there under their speculative gazes and he offers his compliments in order to help ease the stress. It doesn’t seem to work but you nod back to him and smile. Rengoku’s additional praise seems to fluster you further under the attention. Tengen just laughs and tells his friend that the end might actually be in sight. 

He knows he’s not wrong. It would be an incredible thing to see and if it’s true, they need to keep you safe. Shinobu will likely figure out some plan to use your ability without putting you in danger and if they can completely eradicate the demons? It’ll be a flamboyant end. Perhaps then he can keep Hinata’s promise and get the chance to live with his wives in peace. The way they deserve. 

Kyojuro

It’s unusual for a Hashira meeting to be called so soon. He can admit that his curiosity is piqued at your presence but he can wait until it’s satisfied. Whatever he was expecting, it is not the news that their master presented. An ability to transform a demon back into a human? It seems impossible but if that master agrees, he can only imagine the possibilities. The idea that Senjuro may not feel the need to follow him into this danger is enough to fuel his desire for this to be the truth. 

He is unashamed as he gazes at you, taking in your countenance and stance. You’re untrained. He can see it as clearly as he sees the determination in your eyes. It’s admirable. The path ahead of you will be dangerous but you are a spark of hope that he can fan into a blaze. You’re untrained but not for long. He’ll ensure you have the skill to survive. Whatever it takes.

Giyuu

It seems like a dream when Master Ubuyashiki informs them of the reason for your presence. He’s not sure what’s more surprising. The news of your ability or the relief that sets in his chest at the fact that you can turn Nezuko back and save him and Master Urookodaki from needing to fulfill their promise. He doesn’t regret the choice he made but he wants to keep his Master from needing to keep it. 

He glances at you out of the corner of his eye and wonders how you came to be here. Who did you lose to find out you were capable of such things? Did you hold the same guilt he has about being too late? He hopes not. It may seem like a cruel thing for the world to give you this, but the potential is worth it. It has to be. He’ll help as much as he can.

Muichiro

Muichiro is listening. He is. But he can’t help his thoughts from wandering as he processes the news. Were you like a demon? It sounds like a blood demon art but you’re standing in the sun so it can’t be that. Maybe something else? What else could do that? His gaze wanders to the clouds as he thinks. One of them looks like a rice ball. Or…a cat? 

The Master called them here because of you but you haven’t spoken. He’s not sure if it’s true or not but if that master says it is, it is. He can trust that. 

He continues listening, even as he decides that the cloud is more of a frog now.

Obanai

His eyes narrow as he watches you. It seems convenient that you’ve emerged now. First the demon in a box and now this. It’s suspicious in his opinion. Still, he won’t go against Master Ubuyashiki’s orders. If he believes you can help, then Obanai will wait and see. He doesn't believe it, not until he sees it for himself, but he’ll let you be. 

That doesn’t mean that he won’t keep an eye on you though. He doesn’t trust you, no matter what the Master says. You’re a stranger and he wouldn’t be surprised if this was some elaborate trap. He knows you can’t always trust humans, even when you want to. So he’ll wait and he’ll make sure you don’t get the chance to spring the trap. He’ll keep his comrades safe. Especially Mitsuri. He already knows that she’s dying to meet you properly. He’ll be right there with her when she does. Just in case.

Mitsuri

The news is a surprise, but Mitsuri can’t help but be excited! This was the best thing she’s heard. She loves being a demon slayer, and she loves her friends that she’s made but this could change everything! People would be saved! It’s the best thing she’s heard at one of these meetings, even with the last one where she met the adorable Tanjiro and his sister. The fact that you want to help? It’s wonderful. 

You look a little scared though and it’s enough to make her want to reach out and comfort you. It must be intimidating to be faced with them, even if Mitsuri knows they’re not scary. Not really. Still, she makes up her mind quickly. She’s going to properly introduce herself after the meeting. She’ll even drag Obanai with her. The three of you will be great friends, she just knows it!

Gyomei

 He murmurs prayers at the news.  It’s fantastic but his heart can’t help but mourn for the tragedy you must have faced in your discovery. His eyes fill with tears that don’t hesitate to fall. It must have terrified you and to think, you have a bright soul that has still made the choice to help others. It’s commendable. It is tragic. And yet, he feels only hope as you are discussed. 

He doesn't know how it’s possible, but he prays and gives his thanks that they’ve found you. That they are given this chance to protect you as you help them save people. It is a worthwhile effort and one that he will not waste. He could not save the children under his protection and he holds no grudge against the choices that were made, but he will do better now. He will help you reach your potential and save all that you can. 

Plus!

Muzan

When Muzan hears the news of you, he laughs. It cannot be real. There are none but him who can change a being into another. And yet…he feels the disconnection. He knows that he is losing demons as fast as he can replace them. It’s strange. They’re not dead, but they are gone. 

There are no recorded incidents about being able to turn demons into humans, but Muazn isn’t stupid. There were none that did the opposite before him. He sets out his demands, giving the orders to his Upper Moons. Bring you to him. He wants to see if it’s true and if it is? Well, he wants to see what else you’re capable of. Maybe you can do more. If your blood can turn a demon into a human, could a diluted form give him the ability to walk in the sun like he wants? Think of the possibilities. 

And if not? He’ll satisfy his curiosity and make sure to kill you himself.

demon slayer taglist: @renhoeku