3rd Person PoV
Sanemi Shinazugawa is a tough person and have pride in his chest. Literally. He's probably that type of person that are shit with feelings. He's a tough person to crack out of his shell, and only a few people did it. Besides Kagaya, Y/n was one of them.
Y/n was found by Sanemi and Genya Shinazugawa. Y/n apparently escaped at the demon that ate her family. She stumbled upon them when Sanemi and Genya are carrying big tree branches for them to sell.
They were in the woods, restocking. When they heard a desperate scream that can't be ignored. Of course, they helped. She fell unconciouss. When she woke up, she saw a beautiful woman taking care of her.
Sanemi's mom, Shizu, Is a very kind old lady and also beautiful. Y/n later learned that Shizu's husband is abusive, and Shizu will always shield her children from her husband's abuse. Shizu insisted about living with them. Y/n accepted.
Everyday, Y/n helped the siblings by doing household chores. They got along pretty well. Sometimes, Y/n would wake up in the middle night and finding herself helping Shizu by taking care of her wounds.
Sanemi may or may not developed a crush on Y/n since she helped him where his struggling with. She was happy, beautiful, caring. Like man wish for.
The Father and Y/n met once. Y/n was beyond angry and tackled him and try to kill him by a sharp wood. Of course, We will not talk about that.
Some time After Shizu's Husband death, Shizu had not arrived home on time so Sanemi had gone out to search for her. Sanemi instructed Y/n to protect the his siblings, Y/n nodded.
While he was away, a knock was heard at their home and the children eagerly ran to welcome whom they thought was their mother. Y/n tried to warn them But to their horror, a creature had gone in and mortally wounded the siblings except Genya.
The demon was about to attack Genya. however, Y/n and Sanemi managed to tackle it out of the window and onto the street. After the demon was killed, Sanemi and Y/n realized that it was Shizu, their mother. and Genya frantically held his mother in his arms as she died
On the other hand, Y/n was in full of disbelief, looking at the dead woman's body. However, after Genya branded his sibling and his Sister-figure "murderer". The siblings relationship worsen and decline until the two split and went on their own ways.
Sanemi insisted to Y/n that she should come with him. She agreed, Leaving the other sibling alone. Of course, Y/n felt bad for Genya, but nonetheless they will meet again
In their travels, Sanemi learned Wind Breathing. Y/n can't do Wind Breathing, So she made her own, Blood breathing. At first, Sanemi is a bit weirded out but accepted it later on.
Sometimes Sanemi would ask stupid questions Y/n about her Breathing. Until now.
Their interactions is like:
"Why do you need blood when you have breathing?"
"Pfft-- is there a difference?"
"Yes there are! lungs have blood inside their lungs so lungs have air and lungs? Isn't that overpowered, Y/n? "
"..."
"Y/n? Y/nnn?"
"..."
"..."
"Alright, Listen the fuck up-"
Yeah. Sanemi received a lecture from Y/n, despite him being the oldest. Y/n didn't really know what he's talking about.
After Shizu's death, Y/n become more sadistic and insane. Her parents isn't caring like Sanemi's mother, and she deeply respect her for that. She kill demons without second thoughts, believing they should suffer with her.
Y/n also starts collecting different blood for her other breathing forms. But she also drink them for her own amusement. She have unknown syndrome that she's immune to anything. Yes, like poison, acid, lava, expired food etc.
It's mostly like a shield more than a syndrome.
In the Final Selection and the forged of their Blades, they bid their goodbyes, promising that they will meet again and become a Hashira together.
After 4 years of slaying demons, Kagaya called out for Y/n, requesting for her presence. Y/n gladly complied. Kagaya and Amane explained to Y/n her special mission. They said that her crow explained to them her blood addiction and collecting blood is very useful.
Y/n was flattered by Higher-ups noticing her habits and specialty. They give her a special mission to spy on Muzan Kibutsuji by using her breathing forms. She agreed.
Y/n's plan was simple. Kill 50 bad people to get to the Twelve Kizuki ranks. She killed the former Lower Moon 6, so she was the replacement. disguised as a demon.
Her blood demon art is complicated. Sucking or draining someones blood. It's not actually a blood demon art, it's her breathing style. just as a different label.
She actually became a Hashira after Giyuu became one. She befriended other Hashiras like, Kanae, Uzui, Rengoku, even the angry Shinobu. She was sad that Kanae died by the hands of an Upper moon.
It's a actually a pain when you have two meetings to attend. When Y/n's late at Hashira meetings, Kagaya nodded in understanding and continue on. The Hashiras always shrugged it off.
She sometimes arrived on Meetings with her uniform covered in blood. But they assumed she have blood in her clothes because she's the Blood Hashira. It's reasonable.
Oh little did they know...
Anyways, She become closer with Mitsuri and Shinobu. Y/n actually became closer with Shinobu because she comforted her. Even though Y/n's a sadistic person, she still have a heart.
Muzan is actually suspicious of the New Lower moon 6 because he can't read their mind and sense the aura. And it still can't be solve until today.
Mitsuri actually brought back the knife full of blood to Y/n as a thanks for Persuading Obanai for the festival
Here's the explanation of their love for Y/n, "Why would they love reader because she's just insane and a sadist"
- she actually have a caring side. She developed it by taking care of Sanemi's siblings. Sanemi's siblings mostly saw Y/n as a Sister and a Mother Figure. But it's mostly covered by bloodlust.
The Hashiras have seen already Y/n's caring side. But that's an another story.
_______________________________________________
Peace!
~PhoeveUwU
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𝘉𝘭𝘰𝘰𝘥 𝘏𝘢𝘴𝘩𝘪𝘳𝘢 》 KnY
फैनफिक्शन❝ nemi-nemi! let's go kill some demons!! ❞ ( on going! ) Leaving her family without any explanation, Y/n L/n joins the demon slayer corps as she strives and craves blood in the shadows. She lures in demon with her marechi blood, but once a...