Warning: heavy language
A/n: w/n (wrong name)

(Muichiro pov)
I didn't get hit with many arrows and they barely had any poison in them. 'I guess that was just a diversion. But it still hurts.' I was resting until I heard a song. 'What a-gasp!' I saw y/n stomach bleeding a lot and on the ground. "Y/n!"

The demon laughed as steam came out of his mouth again. "She's a hashira, so it's no surprise that she is strong. But also incredibly stupid." He said patting her head. 'Shit! What do I do?! What do I do?!' Started to run toward them but, 'y/n!' My mind went to darkness.

"Hey. Hey you. Wake up!" Someone punched my head. "Ow!" I lifted my head up to see a boy who looked 19. He looked oddly similar to y/n. "Who are you?" I asked him. "My name is WHY DON'T YOU GET THE F*** UP AND FIGHT YOU LITTLE B*******!" he yelled the last part while hitting me on my head. "Ow! Enough!" I smacked his hand away and stood up.

"#1: don't call me 'bastard'. #2: who are you?" I asked glaring. "My name doesn't matter, but I am y/n older brother. I did die long ago." Y/n's older brother? "What business do you have with me?" "I am here to tell you that you must protect my little sister, even though she doesn't or may not care to remember me at all, but I did have a regret when I was alive. So I'm asking you to do what i couldn't. So cat boy, protect my little sister for me will ya?" He said smiling.

His eyes looked pale as he said that, but smiled at the end. 'what could have happened?' ". . . fine." I said, but he was already gone. "And don't call me 'cat boy'!"

I woke up to see I was still running to the demon. I pulled out my sword and started to run at full speed. "Stop!" I ran up more fast than ever. The demon looked at me shocked as I was about to cut off his head.

(Gyutoro pov)
No! I can't get my head chopped off! Not when I'm so close! What can I do? What do I do?

(Flashback)
"Tsukasa." A boy with black hair and amber eyes looked up to a woman with white hair and amber eyes. "Father is off to work again. Would you like to go somewhere while he is out?" "Yes, momma!" The boy ran up to his mom and grabbed her hand while going out the door. 'Who are these humans?' I thought.

The boy and his mom went out to take a stroll near the river in the snow. "Momma, what does dad do exactly?" "Well, he's a demon hunter." "Demon hunter?" "It's a group of people who go out at night and slay demons who are a threat to us." "Woah~ I think I wanna be a demon hunter too!" The boy said kicking the snow. "Tsukasa, demon hunting is really dangerous! You need special training to become one. And besides, you'll worry momma" the mom said hugging her 8 year old son.

(Flashback done)

"Gasp!" I punched the boys face flying him back a little. 'What the hell?! What the he'll was that?! Were those my memories? No-they can't be?! Why would I want to become on of them!'

(Muichiro pov)
'Why does he look shook?' Looks like I can't defeat him on my own. 'Please y/n, wake up!'

(Y/n pov)
I was in extremely great amount of pain right now. I open my eyes to see the demon looking pale. 'What happened?' I thought struggling to breath. 'please body. Get up! I can't let Muichiro do all the work!' "Mist breathing: 2nd form: Eight-layered mist!" Muichiro yelled, his sword in attack mode. 'That's it!' Pain shot through my body once I got up on my knees. 'No! I-can't let my body give out' I got up finally, and started to run. I got near enough to where my sword that had a flat tip can attack the mist. "Zodiac breathing: 3rd star: Gemini!" I swung my sword, attacking the mist.

Gemini form can be used to double a attack at an opponent or when an attack is being thrown at me, it can be used to make the attack be thrown at the person who threw that attack. Right now, I'm using it to double Muichiros attack. "Y/n?!" Muichiro said in shock. I can't blame him though. I am bleeding out internally.

Now 16 attacks were being thrown at Gyutoro. While he was getting distracted by the attacks, I ran up behind him and managed to cut his head off with my normal sword.

"Gah!" His head flew up in the air. I landed on my knees and fell to the ground feeling dizzy after loosing so much blood. " . . . sigh." I was about to fall to the ground, but I was cought by someone. "Y/n, are you ok?" I look up to see Muichiro looking at me worried. 'Does . . . does he care about me!?' I was fan-girling on the inside, but I snapped out of it quickly. "Y-yeah. I'll be alright." 'Uh no you aren't! You are bleeding a lot right now and you just spent like, most of your energy!' I thought.

"That's a lie. I'll take you somewhere to get better." Muichiro said still holding me. "I- think the . . . butter . . . fly mansion can . . . help. Shinobu . . ." that was all I could get out do far. "Shinobu? Oh yeah! . . . I forgot where that is." Of course he did.

"Wait . . . Kasugai crow!" The bird came from the sky and landed in front of us. "Go get Shinobu! And hurry!" After Muichiro said that, the crow flew as fast as it could. 'He really does care. It's nice' I started to tear up, but I fell asleep from dizziness.

(Time skip)
I woke up to a bright light and a small pain in my head. I tired to get up but a voice stopped me "hey!" I looked to my left to see a girl with blue eyes and her hair in pig-tails with blue butterflies. "I see you are awake, if that hashira boy didn't get to us in time you would've died for sure." She explained.

"Who are you?" I asked. "My name is Aoi. I will inform the hashira that you have awakened." She took her leave.

'Ah. She has the same hair pins as shinobu. But blue. What is this place?'
Just then I heard voices, but they were faint. "H-hey! Don't go in there until you're calm!" After that I saw Muichiro slammed the door open. He looked like he was about to murder someone. He then came up to me so fast that I didn't have time to blink. "Y/n! Are you ok?!" "U-um y-yeah." "Phew! That's good to hear."

"I see that she is awake." Shinobu's voice spoke as she walked in. "Are you feeling ok?" She looked at me with a little anger inside her eyes. 'Is she had at me?' "Yeah . . . I'm fine. Thanks to you I guess." I replied. "If I haven't gotten in there in time, who knows what would have happened."

There was a moment of silence for a while. "Well since you are feeling better, I would like to make a proposal." Shinobu finally said. "What is it?" I asked looking at her. "Starting tomorrow, if you want to, you can help train three demon slayers that are here." 'Three demon slayers?' "Sure!" I spoke louder than it needed to be. "Ok. Get some rest." Shinobu and Aoi left tbe room.

Now it was just me and Muichiro. "The demon got away." I looked at hime shocked at what he said. "What?" "He is close to the twelve kizuki, so which means he has the ability to reattached his head. So once you passed out, his head came back on and left after the sun was coming up." Oh I see. The demon got away again. "Don't worry. He is weakened. So we don't have to worry about him in a while." Muichiro said smiling.

"I'm sorry I couldn't be more of help" I teared up. "Don't cry. You did as much as you could. It is me who is sorry. I couldn't protect you as I promised." 'Promised?' What is he talking about?.

"Well the master requested to meet me, so I got to get going. See you, y/n". With that, he walked out the door. "Caw! Caw! Message to y/n from the sound hashira!" My kasugai crow came through the open window next to me. "A letter from Lord Tengen?" I took the not from the crow, and opened it. It said. . .

'Dear y/n, I heard about the demon incident. I'm sorry you had to go through that, I wish you good health. I'm currently on a mission right now, but I'll try to get done with it as soon as I can. Makio, Suma, and Hinatsuru are at home waiting for us to return. Don't bother to write back at me, I probably won't get it. Sincerely- Tengen Uzui.'

I smiled at after reading the letter. It reminds me of how he took me in, introduced me to his 3 wives, helping me get stronger, and because of that, I became a hashira. I put the note on the table to realize that there are other notes addressed to me. I picked up the letter that had cursive handwriting.

(I'm not going to do a cursive font for people who can read better)

'Dear y/n, I am really hoping you get better. I'm so worried about what happened to you! When you get better, I'm going to take you out to eat your favorite food. I can bring Rengoku if you want. He has been really anxious since he heard what happened. From your friend- Misturi'

I opened the next letter.

'Y/n, I heard what happened, I'm hoping you get better. I am surprised you lasted so long against strong demon, even after loosing so much blood. I hope you get well because I want to see you in action one day. Yours truly- Rengoku'

Then the next letter.

'Dearest y/n, I pray for you to get better after that fight. You are a strong soul, I am happy to hear that you are getting treatment. -Gyomei'

I think Hanajima got someone to write that for him. I smiled. I'll read the rest tomorrow.

(Time skip to tomorrow)
"So I'm supposed to be training with three boys who got into a fight with a lower moon?" I asked Aoi as she got the cups of tea ready. "Yes. Although I may warn you, the yellow hair boy is a handful" she said looking like she's about to punch the wall. "Um . . . ok." Was all that came out.

The door then opened "ah you're here" Aoi said. Three boys came in, one with yellow hair and eyes, and one with a boar mask. I looked at the Red hair boy. 'It's him! From the trial!' "Okay boys. You are going to have a new trainer today." Aoi looked at me. "Your name?" "Oh! My name is y/n Uzui. I'm the zodiac hashira. I look forward to train you." I said smiling. Tanjiro looked shocked to see me. The yellow hair boy blushed and smiled. The guy with the boar mask walked up to me. 'What is he do-' My thought was interrupted by him grabbing my face making me look at him. "U-u-um . . ." "YOU STUPID BOAR! YOU SHOULDN'T TREAT A LADY LIKE THAT!" The yellow boy said.

"W/n?" The boat mask finally said. "U-um . . . my name is y/n. Like I said." I had no clue what was happening.
"W/n!" He then hugged me and spun me around. "Woah!" "You came back!" He stopped to set me down and looked at me. "I'm sorry, who are you?" I said feeling guilty. "Huh?! What do you mean?! It's Inosuke!" 'Inosuke?' I stares at him for a moment until I recognized the mask. It looks just like the one he showed me when we met. I started to tear up. "Inosuke!" I hugged him really tight that he was surprised. "Inosuke" we both looked to see the yellow hair boy standing behind Inosuke. "Huh?" "Come with me now. You too Tanjiro!" He grabbed Inosuke and Tanjiro to take them out side. "Sigh . . . not again" Aoi slapped her forehead. "Eh? Again?"

(No one pov)
The two boys got dragged by the yellow hair boy outside. "Ugh! Zenistu!" Tanjiro said after he got hit to the ground. "Yeah what got you so angry?!" Inosuke yelled. "Why am I angry?" Zenitsu said in a hasty voice. "Why am I angry?! It should be obvious! How come you two know such a beautiful girl?! And on top of that, she's a hashira! She is beautiful and strong! How come you two know her?!" "Wha- Zenitsu, just because I was shocked to see her, doesn't mean I know her personally" Tanjiro explained.

"I just knew her from a long, long time ago. Back when I was small!" Inosuke said prideful. "Huh?!" Tanjiro and Zenitsu said at once. "You knew her from when you were a child?! She's a childhood lover?! No wonder she was so happy to see you! But how did you end up with her?!" "I knew her for a long time until she said she was leaving to move somewhere far from where I lived!" "Huh?! A long distance relationship?! You probably got a lot of letters for her!"

"Zenitsu, calm down!" Tanjiro got in between the two. "Inosuke doesn't know what a lover is, remember?" Zenitsu was quiet for a moment. "Oh yeah. But I still want to know how you know her." Zenitsu glared at Tanjiro during the last part. "She was someone who helped me and Nezuko." Tanjiro said smiling. "Uh huh. Let's just go back in."

(Y/n pov)
The boys came back in. "Ah you're back" Aoi said. "I look forward to training with a hashira!" The yellow boy said all giggly. "All right. So y/n will be teaching you today. I'll take my leave now." Aoi said waving a little with 3 young girls following her. "So I guess we will start off with questions first. Anyone got any." I said sitting down.

The yellow boy got up and walked over to me. He grabbed my both of my hands and stared at me with a huge smile "will you marry me? I would love to marry someone as pretty and strong as yo-" he stopped when I started to shake. He was scaring me. "O-o-oh my bad! I'm sorry! Please forgive me!" He started to apologize. "I-i-i-it's fine." I managed to speak. I cleared my throat once he got back in his seat. "So, anyone got something they would like me to help them with?"

The Tanjiro boy raised his hand "I need to work on my breathing, and maybe my muscles a little?" "Okay. Anyone else?" The yellow boy raised his hand "I would like to work on my breathing and speed." "Alright!" "I don't need to work on anything! I'm Inosuke, the king of the mountains!" We all were quiet after that. 'He has boosted his self-esteem.' "Uuuhh. . . we'll get to you later." I said somewhat smiling.

(Time skip)
I helped Tanjiro with his strength a little along with his muscles. He is doing really good with his breathing. "Total concentration breathing?" I asked him. "Yes. Do you know about it." "I know how to use it yes. But for me I use a different breathing technique." "Different technique?" Tanjiro asked curiously. "It's a breathing technique that I made for my breathing style, it might work on others as well, it's called 'breathing control'" "'breathing control'? It sounds familiar to 'total concentration'." Tanjiro asked. "I am aware of that yes, but it is not I assure you. Breathing control is a technique I use for my zodiac and song breathing, the technique can help me hold in my breath for a very long time, and help me breath for a long time as well with no issues" I said smiling.

"Oh wow! You think you can be able to teach me that?" He asked determined "I will teach you at my estate one day. I'm sorry." Tanjiro looked down after what I said. "Hey, maybe I can give you a head start on it?" Tanjiro looked like a little boy on his birthday when I said that. "Oh thank you thank you! I'll be in your dept!" "No it is an offer! You are not in dept to anything!" We both argued of the so-called-dept issue.

(No one pov)
Little did they know, someone was watching the scene play out. "Why hello there Muichiro." Shinobu said startling the boy. "Oh! Shinobu, don't startle me like that." "Hehe, sorry about that. But why are you standing here watching y/n train Tanjiro?" She asked with a teasing smile. "Oh right, I was supposed to ask you for some medicine for y/n to take to Tengen, but I got distracted." Muichiro looked at the two still politely arguing when he said the last part.

"It's alright, I'll go get some medicine." Shinobu left. Muichiro was still watching the two. 'She never changes, does she?' Muichiro thought as a small smile on his face. "Here is the medicine." Shinobu popped up out of nowhere. "Eee! Don't do that please." Muichiro said as he grabbed the medicine and walked away.

After he was gone, Shinobu looked at
y/n and Tanjiro finally shaking hands. "I know your feelings toward her, Muichiro. But the corps comes first."

(Tanjiro pov)
Me and y/n came to a conclusion that she will teach me 'breathing control' while I allowed her to watch Nezuko when there comes a time. Although something feels off about her. I smell many emotions from her, but two are over-powering the others.

(Y/n pov)
Tanjiro decided to go work outside, so it was Zenistus turn for a while. "So you're saying you want to become faster and work on sword technique?" We were outside "yes. Although my breathing style can help me be fast, I want become faster so I can just get the mission done." Zenitsu said looking at the ground. I heard a sound coming from him, it was like he is scared of a mission. "Are you scared?" Zenitsu shot his head to me. "Y-you could tell, huh? I cry like a baby everytime I encounter a demon. I'm scared of death, being alone, and demons in general." Zenitsu looked guilty.

"It's ok to be scared sometimes. If anything, I would be surprised if I saw someone who isn't afraid of death." Zenitsu looked at me in disbelief "b-but you're a hashira! The strong shouldn't be afraid!" "It's true. I used to think that as well. But when I became a hashira, I was still scared. I'm scared of a demon that left my grasp two times already. But look how far you came despite being scared. Everyone is scared of death, I use something to help me get distracted from my fears." "R-really how?!" "I try to imagine what would happen if I didn't slay the demon. It helps me look past my fears sometimes. I bet it will help you too" I smiled at him. He blushed a little and teared up. Just then he hugged me.

(Time skip)
I saw Tanjiro on the roof. 'What is he doing here so late at night?' I jumped up to where he was sitting and called I
His name. "Tanjiro? Tanjiro~? Tanjiro!" At the 3rd call he snapped out of his trance. "Huh?" He looked to his left and saw me close to his face. His face turned red, so I backed away. "What are you doing here alone at night?" I asked. "I'm trying to use 'breathing control', but I kept passing out. So I came outside to get more fresh air." 'Ah so that's why.' "I'm impressed." "Huh?" He tilted his head to the side. "You only learned about it today, and you already are training this late at night. You are a strong being. You and your sister." I stared at the stars while I said the last part. I started to get sad at the thought that he reminds me of my sister, Sakura.

A moment of silence fell upon us. I turned my head to Tanjiro after a moment. "Are you sad?" I gasp at what he said. "You have been smiling since I met you, but after that white haired guy through you on the ground, you still smiled." He had worry in his eyes. He really is like her. "Yeah, I am sad. But me being sad makes me sad. I have a happy family now. I still might be sad from the past." Tanjiro looked at me with a sad expression. "May I ask a question? What made you join the demon slayer corps?" " . . . I was taken in by one of the hashira. I was to become their Tsuguko, but I became a hashira. I left my old family behind, even after they sent me off to get married. I do miss my sister's a lot, I'm sad because you remind me of one of my elder sisters. She was a kind person like you. She loved me, like you love your sister. If anything . . ." I looked at Tanjiro with tears coming out of my eyes. "I hate myself more than I hate Muzan." Tanjiro looked like he seen a ghost.

"I saw faces when you said she was your little sister. I saw my sisters, and those demons I had slayed a long time ago. They had my elder siblings names, the sister was Sakura and the brother was Nyx. Nyx was one of my elder brothers before he died." I stood up "protect Nezuko and I will help you slay Muzan Kibutsuji." I left after all that. I walked to my room that I was staying at and lied down on my bed and tried to stop the tears that are flowing out. 'You idiot! Why did you tell him all that?' I saw the letters that I opened last night, remembering that I had not opened two of the letters. I opened a letter that had really neat hand-writing. I'm surprised I could read it.

'Dearest y/n, I am terribly sorry for the incident that happened. I know you will pull through this, for you are a strong young girl. It's terrible that such a young girl like you had to go through that. I'm sure to find you a little safer missions until you fell comfortable going on harder missions. Dearly- master Ubuyashiki'

'Ubuyashiki?' I guess that's the masters real name? I opened the last letter.

'Y/n, I am sorry for what happened at the trail. I was just pissed at the boy and the demon. The demon that put you on the brink of death gave me another reason to hate them. I hope you can forgive me. -Sanemi'

'Awww~Sanami.' I smiled after reading the letter. I will have to say thank you when I see him again.

I tried to fall asleep, but that demon kept coming into my head. "I'll get him next time." I whispered as I closed my eyes.

(Gyutoro pov)
"You requested to see me, master?" I kneeled down. "Yes. Gyutoro" his red eyes and black hair are terrifying as it is, but it's worse when he is mad.

"Have you managed to get her?" Muzan asked. "I tried, master. But that time she was with a hashira. It seems as though she had become one as well." I explained. He turned his body so he could fully see me. "I tell you this everytime I see you. I gave you two blood demon arts so I know you would succeed, but you fail my only request for you. Sakura and Nyx was only a part of the plan, but I can overlook that since it sorta was a success." I could feel his cold murderous glare on me as I shivered.

"If I may ask again, master, why do you want the girl so badly?" I could hear the tick mark on his forehead appear. "Don't ask me that again, you hear me!" He shot something sharp at me that I winced in pain. He dismissed me afterwards.

I don't get his problem, why doesn't he get an upper rank to go get her? " . . . Just you wait y/n. I'll find you and I'll be more powerful to face you in a fight. After what your so-called-father did to me, I'll break every bone in your body!"

(Muzan pov)
He asked that question twice already. I'll shut him up after he gets her. As if I'll make him a twelve kizuki. Maybe I will if he manages to get her the next time, but if he fails, I'll kill him and take her myself. I don't care who I have to go through, I punched the wall in front of me. If only she would remember.

(Flashback)
I was walking around a place where it was highly crowded. I heard some crying from a fancy, yet not so much, house. I decided to take a look. "Hello, and welcome to the l/c estate. We are happy to suite your needs." A woman said. "Yeah . . . thanks." I saw a 11 year old girl who was sweeping. I think I felt my hearts skip a beat.

I decided to walk up to her ignoring the woman. "Hello there young girl." I said. She looked up at me with her e/c eyes. For some reason I thought they were beautiful. "What is your name?" "Y-y-y-y/n" she stuttered. "Oh sorry! She's my daughter. She was just leaving, right y/n?" I could feel the anger off of this woman. She hates her daughter. I took the girls hand and walked away also ignoring her mother.

We sat outside the porch looking up at the stars. "The stars are beautiful." The girl spoke quietly. "They are." Was all I said. She randomly got up and ran to the flower bed. 'What is she doing?' I thought. Just then, I felt something placed on top of my head. I looked up to see a flower crown on me.

"I made it for you!" The girl said all giggly. Just then I knew I had to leave, the sun was coming up in half an hour.

(End of flashback)
I felt like I needed to see her again after a year of trying to find the blue spider lilly. When I was about to return, I heard that one of the hashira had a new Tsukugo. It described her just like I remember her. I want to see her again. Make her into a demon.