Powerful... ( muzan X reader )

meeting?

i'm sorry this was rushed i will make them longer! i have to write a new levi,feitan,and chrollo chapter. man i know yall impatient i'm impatient to it's okay 😅.
——————————————————————-you turn around bumping into someone's chest. you shook your head and look up.
you see a man with beautiful ruby eyes with a white hat and black suit. him staring into your eyes like he's looking into your soul. you stared back not wanting to look away
??? pov
i sent my demons out so they could eat someone people to get stronger. i decided to walk around it's starting to get dark out. might as well take it as an opportunity to get some fresh air.
i was walking into the woods i hear a voice say "i insist you leave me alone or else you'll get hurt." i stopped wanting to see who it was. i heard the tree shake making the leaves raffle.
i went behind a tree to see what was happening. it was a woman.. she was being attacked by my demons. i couldn't even figure out if she was a human or demon. one of my demons run to her slamming her to a tree. she looks at him and kicks his neck, making his head fly into the air. she jumps into the air kicking his head to a tree with a sharp stick. i was impressed, a little woman with so much power.
she drops down landing her fall. "anyone next?" she says cleaning her hands. the demons look at each other and attempt to attack her. which they all failed at, she killed all of them leaving one. i looked at the demon eyes. his mind was saying "who the hell is this woman"
"who am i?.." she says.
she can read minds to? i thought i was the only one.
"i'm y/n l/n. i'm pretty sure you dont know me. you should not."
"how are y-you so strong." the demon replies.
she grabbed his chin and says
"i'm an 800 year old demon, who's been watching demon slayers train following there footsteps. unlike you demons i dont eat people and dont intended to. i simply observe other people's attack to make them mine but better" she says letting go of his chin making his head fall back to the ground. "how come your not known! your not real! your just a bitch whos gonna die in my hands!" he yells.
is he dumb? did he not just see her kill the other demons like nothing. take the hint stupid pathetic boy.
she got a knife and threw it at his head making him fall back and stuck to the tree. she pulled her katana back out slicing his head off. i decided i wanted to show myself. she could be a good person to control.
"Tch,pathetic" she mumbles. she turns around and bumps into me. i look into her eyes they were blue mixed with purple they were beautiful. she looked back at my eyes daring not to look away.
she was beauty beauty ive never seen before. her hair was beautiful even after fighting, her face is smiling at me. is she not scared? does she know who i am? shes 800 years old and have never seen her face around.
y/n's pov
i couldn't look away his eyes were so beautiful, his features in general. almost perfect..no..no he is perfect.
i didn't know what to do what to say.. it was awkward. i noticed he started becoming awkward to, i mean we were just staring at each other. i tried getting ahold of his thoughts but i couldn't.. it was simply impossible.
"who are you" he says.
his voice was deep and strong. the definition of fearless it made my legs feel weak.
w-wait what am i saying i don't even know this man.
"i'm y/n l/n. who are you?" i say slightly tilting my head. he was much taller than me.
"muzan kibutsuji." he answered.
"muzan..muzan ive heard that name around, it sounds very familiar?" i say still staring into his eyes.
"mhm.."  he says
i started getting a weird vibe from this guy i dont know what is was.
"well i'll be on my way. uh bye muzan.." you say trying to walk away but he gets a hold of your wrist.
you quickly looked back at him with a glare.
"follow me l/n." he says. he begins pulling me really fast. his speed was so quickly..
i mean it's not like i had a choice he was literally dragging me, as much as i tired i couldn't get out of his grip. i honestly gave up if i cant even escape his grip, than whats the point in fighting him.
-
he took me to this place i don't know what it was.
"what is this place it's so huge..?" i say while looking around
"it's called the dimensional infinity fortress" he says lowly.
i smelt the sense of other demons i quickly looked around to see them looking at me.
"who's this" a man says blue markings on his face with pink hair.
every demon was studying my figure making me tense up. there was to much of them i didnt like it. i tried pulling my hand out of muzans grip but he simply just looked at me. i didnt like this i didnt like being surrounded with many threats.
"i'm y/n l/n" i say looking at the pink haired man. i smiled to show no fear i didnt care i know i would do anything not to die. besides i'm the only demon who can go through the sun. i think...
i can see muzan glare at the man and the pink haired smile quickly faded and looked at me with a straight face.
"can we eat her she seems like a delicious meal!" one demon says out of no where.
"yea!" "is she gonna be a slave?!" other demons yelled making assumptions.
before muzan opened his mouth i said
"no i'm neither of those and i'm a demon first of all. practically stronger than all of yall combined. maybe not all of yall but some of yall." i say still smiling.
they looked at me and laughed.
"y-you stronger than us HA" a random demon says still laughing.
i smiled even more i finally got out of muzans grip and walked up to the demon.
"care to give it a shot, we won't die simply just lose limbs." i say to him.
he looks at muzans and muzan just shrugged his shoulders.
"if i win you have to do what i say for a month." he says
"if i win you have to respect me. either way you are but i don't care." i say back
the demons made a big circle watching us. muzan in front all the demons made a little space from him to not anger him. i wonder why there like that.
i pulled out my knife, just a simple knife that had black tattooed roses on it. we ran to each other i jumped and he jumped to. he was fast but not as fast as me. as he jumped i grabbed his head slamming it into my knee stabbing his neck at the same time. i landed he didnt, he groaned and i grabbed his head once again and threw it over my shoulder making him flip over in front of me. i grabbed his arm and twisted it, making it break, he pushed himself away from me and he healed himself.
"stop running away for me and fight back. or are you already fighting if you are wow! your weak." i say with a smile.
he growled and ran to me he grabbed my arms i couldn't move i used my force and flipped myself over him, i made my heel pull out of a knife and kicked his neck. making his neck fly into the air and i caught it. 
"i win." i say.
i dropped his head on the ground close to his body. i stepped on it on purpose and walked away.
the demons looked at me speechless shocked that a tiny girl had so much in her. i turned to muzans and he nodded his head. i reached my hand out for him to take it and he took it and made me follow him.