Demon Slayer AU

By: FunahoMisaki

(A/N: I own nothing and it was just a little blurb that hit me so I had to write it. Maybe a bit OOC.)

"Tanjiro-kun!" Shinobu waved happily when she saw Tanjiro on the mountain even though she had almost beheaded Nezuko right then.

"Shinobu-san!" Tanjiro waved back at the woman with a smile although he was still clutching his sword, or rather what was left of it, tightly.

"Sorry about that. I didn't know that was you and Nezuko-san! I just saw a corps member near a demon." Shinobu said and she sheathed her sword, which made Tanjiro relax.

"It's alright. I can understand why you would have reacted that way! I promise though that Nezuko hasn't eat a human or even drank any blood in the last two and a half years." Tanjiro said and Shinobu nodded while Giyu lowered his sword as well and then Tanjiro glanced up at the sky.

"I'm sorry! I have to get Nezuko back to her box before the sun comes up." Tanjiro said and he bowed before he hefted his sister onto his back, thankfully she was in her small form, and took off.

"Here let us escort you. There are other Slayers here after all." Giyu said and Shinobu gave him an annoyed look but they both kept pace with Tanjiro easily.

"Thank you!" Tanjiro said giving them a grateful smile and then he smelled a familiar scent.

"Okazi-san!" Tanjiro went racing towards her, after all he had left the box with her, and he smiled in relief to see that aside from her broken arms she was okay. Thank goodness that his dad had told him to cut the strings just in time to keep her neck from being twisted and broken by the Mother Spider Demon.

Jumping back he narrowly avoided a slash from another corps member, and he recognized her from the Final Exam, but Shinobu easily caught the younger girl before she could attack again.

"It's alright Kanae-chan." Shinobu said and the girl immediately pulled out a coin and flipped it, and when she caught it she looked at it and sheathed her sword with a nod.

"Thank you for keeping it safe Okazi-san. I owe you." Tanjiro said bowing to the girl thankfully while Nezuko went towards her and rubbed the top of Okazi's head for a few seconds before she retreated into her box as the sky began to lighten.

"N-No. You saved my life, watching over this box was the least I could do." Okazi said looking flustered and embarrassed and Tanjiro smiled at her as he kneeled down next to her. It was time he tried a technique he had worked on with Tamayo-san…after he had proved his power of seeing and talking to the dead to her. She had broken down sobbing and hugging him (much to Yushiro's anger and jealousy) after she got to see her husband and kids and hear how they never blamed her and she had been happy to learn that her eldest daughter had survived because she had been reading a book and the book took most of the impact.

Tanjiro kept the fact that they were related to himself, he was sure she could smell it and if not then he didn't want to overwhelm her by her learning she had two living descendants from her surviving daughter. She probably would figure it out if she compared her blood to Nezukos…or when they saw each other again and she learned as much either from him or from her own nose.

"Here I'm going to try something. I don't know if it will work but if it does…I might be able to heal your arms." Tanjiro said softly and she looked at him wide eyed and nodded her head while the Hashira watched closely. This would be new.

Tanjiro sucked in a deep breath, and then focused as he gazed intently down at his hands and then when they began to emit a faint heat and light glow he put them gently on one of her arms.

Tanjiro's brows furrowed and sweat started accumulating on his brow as he focused harder and harder while everyone watched quietly. There was a soft cracking and creaking sound and then Tanjiro's eyes narrowed before he finally smiled and relaxed, letting out a large exhale that nearly blew Okazi over.

"There we go…that should have fixed the torn or damaged muscles and the breaks and cracks. How's that feel?" Tanjiro asked smiling at Okazi who moved her arm a bit experimentally and then stared in awe.

"It's…it doesn't hurt, it's a bit sore but it's not…it's not broken anymore." Okazi said awed as she stared at him and he smiled widely and brightly.

"That's good. Now here let me do the other one." Tanjiro said moving to her other side.

"Tanjiro-kun how did you do that?" Shinobu asked wide eyed and Tanjiro glanced at her but focused intently on his work before Okazi's other arm was healed and he relaxed.

"Sorry, I wasn't ignoring you. I just need complete concentration for that." Tanjiro said smiling as he watched Okazi move her arms through some motions and smile widely while starting to cry now that she was healed and the demons were dead. Her nightmare was over now…

"Amazing. I've never seen a healing technique like that before." Shinobu was immediately beside him looking over his hands curiously and she noted that they were a lot rougher than before but also now had some small burn marks on them.

"I invented it with some help from a doctor I met. So you know how our styles work by us taking deep breaths and increasing all the oxygen in our blood which then turns into our techniques and each technique shows that style by the element you use, such as water coming from your sword for water style or flames for Flame style?" Tanjiro asked and the others nodded, that was basic things they learned before they even got to Final Exam.

"Well you know how my style is different from everyones because while it's element does burn and hurt people…much more often it nurtures people and is believed to help relieve curses and all?" Tanjiro asked and the two Hashira immediately glanced towards the sun and nodded, there were a lot of people who worshiped the sun goddess for those reasons after all.

"Well when I was talking to the doctor I wondered why there were no healing techniques for the Breathing Styles and she mentioned it should be possible to make some for some styles, like how water style should be able to draw something like poison out of the body or Flame Style should be able to warm up the body without burning if it gets to be too cold. So with her help I made a technique where I focus my breathing and then direct all of the power to my hands, from there you saw them emit that faint glow? That's because there was a lot of buildup of the power in my hands so when I directed it to her arms, some of my power went into her arms and from there I could look into the transparent world and direct it to the broken bones and muscles to repair them before calling the excess back into me." Tanjiro said smiling as if it were obvious and Shinobu and Giyu gaped in disbelief at him.

"Since it takes a lot of concentration I can't do it during a battle or anything and I certainly can't do anything else while focusing on it." Tanjiro said and he was nearly tackled to the ground by Okazi now that he was done talking.

"Thank you thank you thank you thank you! I owe you more than I could ever repay! I swear I'll follow you for the rest of my life!" Okazi was crying and happy as she hugged him and said that. Giyu smirked a bit and Shinobu giggled at the look on Tanjiro's face as he went bright red at her words. Kanao flipped her coin and then when she looked at it she just nodded and didn't react.

"You don't have to do that! I did it because it was the right thing to do!" Tanjiro tried to calm down Okazi who clung onto him tightly.

"Oh my. How bold." Shinobu said and Tanjiro went even redder to her amusement while Okazi didn't even hear the pillar.

"Emergency meeting! Emergency meeting! All Hashira are to report to the Ubuyashiki estate for an emergency meeting and both Kamado Tanjiro and Kamado Nezuko are to be brought along unharmed." The nearby crows squawked that out and the Hashira nodded their heads and quickly separated the crying and happy survivor from the bright red and near unconscious spirit seer.

"Come on Tanjir0-kun. Let's go see Oyakata-sama." Somehow he had ended up in Shinobu's arms while Giyu calmly lifted Nezuko's box, earning a small growling noise from within.

"Ah let me carry Nezuko-chan! She gets upset if other people carry her." Tanjiro said squirming to get free of Shinobu who pouted and released him and Giyu handed over the box immediately.

"It's alright Nezuko-chan. Onii-chan's right here." Tanjiro assured his sister as he rubbed the top of the box and there was now a happy purr like noise from within.

"I think it's because she knows my scent as being her big brothers, and because I smell similar to dad it's comforting to her." Tanjiro shrugged at the Hashira sheepishly and they merely nodded.

"We shouldn't keep everyone waiting. Let's go." Giyu said as he picked Tanjiro and the box both up in his arms and Shinobu's eyebrow twitched. First he stole the boy to be a Water Breather, and now he was carrying the boy like husbands would their wives? Giyu was really working on her nerve when it involved the boy who gave her back her hope for the future and knocked her out of her almost depressive revenge induced short sightedness.

"Ara will you be alright carrying them the entire way? Or would you like me to carry them at some point?" Shinobu asked giving him one of her cold smiles and Giyu had no change in facial or eye expression as he tilted his head at her a bit.

"I'll be fine. You don't have enough muscles to carry them for long without harm so it's easier if I do it." Giyu said and Shinobu's eyebrow twitched dangerously. Kanao flipped her coin and then nodded when it came back down.

"You shouldn't call Shinobu-nee weak Water Pillar-sama." Kanao said emotionlessly and Giyu blinked and tilted his head a bit.

"I'm not? She's small and doesn't have a lot of muscle mass, carrying a young man who is pure muscle, the box, and his sister inside of the box despite her being smaller than normal, would be a good deal of weight for anyone her size and body shape. It'd be bad if she got hurt." Giyu said confused a bit as to how they thought he was calling her weak.

"Yeah just so you know Sabito-san is laughing loudly while your sister is face palming and complaining about how you have no social awareness or idea of how to phrase your words right." Tanjiro said although he didn't get it either really. Giyu-san was just looking out for Shinobu-san after all right?

"Let's…let's just go." Shinobu said sighing heavily and she recalled how Oyakata-sama had told them all of why Giyu was so aloof and often didn't interact with them well. About how he believed he should have died in the Final Exam instead of his friend who had killed almost all the demons and saved everyone but himself.

She had to remember that Giyu hated himself and looked down on himself and often didn't know how his words sounded to everyone else because he thought they believed he wasn't worthy of being a pillar or even alive.

"Alright." Giyu said and he took off with Tanjiro and Nezuko in his arms and Shinobu on his heels with Kanao staying behind to help or guard the kokushi.

But…listening to Tanjiro talk Giyu's ear off and the man actually responding…Shinobu smiled.

It looked like Giyu's walls might be breaking down soon and perhaps then he could realize that the other Hashira more than believed him worthy of his position. That they were glad he was alive even if he wasn't good at saying what he meant.

She had to wonder about how it was Tanjiro preformed such miracles.

She was so lost in her thoughts on that, and making sure that there were no other demons approaching them, that she never heard Tanjiro coughing wetly into his hand before rubbing it onto his uniform.