Kimetsu no yaiba x reader OneShots♡(Demon slayer)

you as their sister [ Akaza ]

Headcanons:

• he begged for you to become a demon.

• you both hate doma.

•he's overprotective.

•he'll litterly kill doma if he tries to talk to you.

•he is calm when you're around womans.

• you stay on muzan's infinite mansion when akaza is out for kill or something.

•your an semi-uppermoon 3 demon.

•you sometimes ask for him to play tag in the infinite mansion.

•you eat humans while he don't.

• almost always holding hands.

•he doesn't want to loose you.

•he doesn't mind if you eat humans cause you need to eat to live.

•you almost look like him.

• he also takes the damage from you.

•he also don't trust the demons around you.

•when he tried to ask kokushibo to fight him you always pop onto him(akaza) that you would want to fight him(akaza) too.

• he would sometimes pat your head.

• he'll do the mission that muzan told you to do,only if it's need to kill an hashira or a strong demon slayer.

• you can do one of his abilities but only a few.

•you once fought an hashira but akaza joined you.

•you sometimes try to convince him to eat human flesh.

• you are sometimes very quiet.

•you also sometimes tell demon slayers or other humans to become a demon.

• you sometimes argue with him when he tries to kill the demon slayer who you tryna kill.

• you both bully doma too.

• you sometimes don't listen to his orders about staying on the infinite mansion or to stay away from the fight.

Short story:

Y/n's POV:

"Y/n" muzan called out as I appeared immediately after he finished calling me.

"Yes, Lord muzan?" I asked gently.

"Kill this high rank demon slayer." Muzan said.

"An hashira?" I asked looking up to him.

"Yes, they been disturbing my demons while they try find the blue spider Lilly.." muzan responded.

"I understood, leave it to me." I said bowing.

"Sorry to interrupt Lord muzan, but please let me do it instead." A relative voice said as I looked to the person.

"Onii-chan?" I asked almost yelling.

"I don't want my dear sister to get hurt badly." Akaza said.

"You both decide, I have other things to do." Muzan said as a biwa sound came as the room his on change as he's now gone.

"I'm not that weak!" I said as I stood infront of my brother akaza.

"I'm a demon,onii-chan!" I said trying to reason out.

"I'm not saying you're weak," akaza started to speak.

"Just don't wanna loose you." He said calmly looking down.

"Onii-chan..." I said feeling bad.

"Fine.." I said looking away.

"Just don't fail." I said still looking away.

I felt him smile a bit then disappeared.

I smiled a bit as a biwa sound came as I am now on my room.

I sat on the floor closing my eyes waiting for akaza to come back.