The Unknown Hashira (Demon Slayer x Reader)

[46: The Main Child]

Ever since Y/n appeared and attacked Muzan multiple times, it seems their chance of winning became more possible. Still, even if Y/n is here, certain problems occur, like the problem with the hashiras. 

They're still humans therefore they have limitations to their skills, that's why someone needs to learn something that will help them with their advancements.

ʚɞ ʚɞ ʚɞ ʚɞ

Obanai started getting frustrated with himself, stating how he has contributed the least in the battle. He started thinking about how Muichiro did in the battle against the upper moon 1, the crow stated that Muichiro only held his sword and the temperature increased making it red. 

Because of this, Obanai's body started heating up, causing his mark to appear and make his blade red. Because of how focused Obanai is he almost faints, but someone saved him. 

"Iguro, try and land on your feet! You mustn't die yet!" Y/n said, as they threw Obanai up in the air and let him fly. Y/n looked back at Muzan and noticed one of his arms got cut off making them confused. 

They also noticed how their tentacles are avoiding something that they can't see. They know that this thing is an ally since their tentacles will attack if it isn't. It cut off Muzan's arm again and it was a rough cut. "It's a rickety blade," Y/n murmured, slashing some of Muzan's tentacles while focusing. 

They closed their eyes and Y/n's senses heightened again, the hair on their arms stood up and started sensing whatever it is. "Someone is there... humans... three of them... two boys... one girl..." Y/n opened their eyes and noticed it was Kanao, Inosuke, and Zenitsu. 

When they noticed that it was the three, Muzan also noticed them, before the man can cut their children, Y/n immediately attacked Muzan with their katana. "Don't you fucking dare hurt my children!" Y/n growled making Muzan annoyed. 

"Y/n-san!" The three younglings screamed and Y/n smiled at them. 

Gyomei noticed the three and asked them an obvious question. "You guys are still alive?" Y/n looked at their three children and smiled, knowing that all of them are at least safe. Inosuke started bickering with everyone, ordering them to put on the papers Yushiro gave them. 

While that happened, Obanai was able to close in on Muzan and cut off two of his arms at the same time. "He's regenerating slowly! If you use a bright red blade... even Muzan takes time to regenerate!" Sanemi shouted. 

Kanao and Zenitsu put on the eyes again and attacked Muzan at the same time, combining their breaths to at least slow him down. Before Muzan can attack again, Obanai closed in and attacked him by slowing his tentacles down. 

Y/n noticed Mitsuri standing beside her and immediately clashed their sword together. The heat of the sword clashing together made both of their katanas red. "Everyone! Clash your sword together, the heat will make it red!" 

Gyomei clashed his axe and boulder together, the force and heat made it red. "Tomioka! Prepare yourself!" Sanemi shouted and clashed their sword together. The crow screamed that the sun will appear in One hour and three minutes. "No problem! We'll chop him into little pieces!" Sanemi shouted as they got ready. 

ʚɞ ʚɞ ʚɞ ʚɞ

Sanemi decided to use the paper eyes and was able to cut off some of Muzan's tentacles. Y/n helped Sanemi with it even if they can't see him, they can feel his excitement. Y/n used their breathing again and was able to blast off most of Muzan's tentacles making him scream. 

The red blade of Y/n makes Muzan's regeneration slow and their breathing seems to make him scream in pain. His twin's strength really is amazing and annoying him all at the same time. 

While everyone is fighting Gyomei started focusing on his surroundings and suddenly came across the see-through world. Where even if he has no eyesight, he was able to see through Muzan's body. The man has multiple brains and hearts! A truly disgusting sight!

But this explains so many things, the fact that you can't kill him by chopping off his head is because of his body. He can make more than one body! His heart and brains are also not fixed, meaning that you can't just attack him with no plans. 

"Look closely at his body! Does your vision change? The rest of you can try too! Does he look transparent?" Gyomei shouted, advising everyone to see-through Muzan's body. Obanai did what was told and was able to see through Muzan. 

This made the demon slash the ground, everyone shielded themself and waited for the attack but it didn't arrive. They heard someone cough and looked in front of them and gasped. 

Y/n took all of the damage caused by Muzan. 

Even Muzan himself was shocked, he wasn't trying to hit his twin, and for them to save those lowly humans made him mad. "Are you mad? You weren't supposed to take all of that!" Muzan screamed at Y/n, his blood boiling at what his twin did. "Even if you sided with the enemy you're still my twin and I would never do that to you!" He shouted making Y/n laugh. 

Y/n's body was ruined, the wave is as strong as an earthquake so for them to take it all is a stupid idea. Their body has so many cuts and their stomach is cut open, their organs spilling out. 

Y/n regenerated their body and it was as fast as Muzan, immediately using their tentacles to place the hashira away from Muzan. "Y/n! Let us help you!" Sanemi shouted as he wiggled away from the tentacles but to no avail, Y/n didn't listen. 

Y/n used their sword to attack Muzan, the man screaming in pain again, trying to get away from Y/n. "You stupid twin of mine! Fighting me even if your body is slowly dying!" Muzan screamed and attacked Y/n, but before he could someone came and cut off his arms. 

"Hinokami Kagura: Beneficent Radiance!" 

Y/n looked beside them and saw Tanjiro, making them gasp and immediately disgusted. 

"Oh, Tanjiro you look horrible." 

"You look positively awful, Tanjiro Kamado." 

Muzan and Y/n said at the same time, as they glanced at the boy before them. The boy's right eye has a huge chunk of flesh poking out of it, it looks like it will explode soon. It's a miracle the boy can still see. 

"Let's finish this, Muzan." 

ʚɞ ʚɞ ʚɞ ʚɞ

Tanjiro came meaning that this will end soon... Sadly... 

- Zeddxhi.