The Child of Darkness (Demon Slayer Role-Swap AU x OC)

Blood, Tears, and D E A T H

Tocho's P.O.V

Well.

I got blasted to pieces.

My remains crept together and I managed to stitch myself together.

"Ugh. What'd I miss?" I groaned.

"Not much, but Muzan got away." Nezuko told me, still in tears.

"That bastard. We'll get him one day, don't worry, and besides, I have some of his blood on my blade, we can take this to the demon slayers to see if they can come up with a cure."

"Yeah, I guess we can try."

Suddenly, a different voice spoke up.

"No need to bring it back to the demon slayers, I can study it."

My head whipped around to the demon, and I immediately leaped back, away from her.

"Who the hell are you?" I growled, "Why are you here?"

"Don't disrespect Lady Tamayo like that!" A green haired demon yelled at me.

"I only respect those who earn my respect! So far, neither of you have! Give me one good reason why I shouldn't decapitate you right here and now!"

"Tocho, calm down, they were helping us." Nezuko told me.

"Oh." I dropped the subject, "Okay, then. But if they hurt you, I will not hesitate to make their life a living hell."

Nezuko sighed.

"On a serious note, who are you and why are we here?" I asked the two demons sitting across from us in the traditional-looking house.

"My name is Tamayo, and this is Yushiro. We saw you confront Muzan and decided to bring your remains and your siblings back here to heal."

I nodded, frowning slightly, "Still can't believe I let that bastard get away."

"We need your help. I believe you also need ours."

That got my attention.

"What could we possibly need your help for?"

"Stop being disrespectful!" I got punched in the face and sent sprawling.

"Goddammit! I didn't hit you! Why'd you hit me?"

"You were being disrespectful."

"Well next time don't hit me! Just tell me so I can amend my errors! Sheesh."

Tamayo reprimanded him for constantly hitting me.

He immediately got back to his seat and adopted a puppy-type face.

Sheesh, this guy is obsessed with Tamayo. What was his name again? Yushiro? Meh.

"Anyways, what did you need our help for?"

"We want to find a cure for the demon transformation, and we were wondering if you can help us by extracting blood from the twelve kizuki, the twelve strongest demons aside from Muzan himself." Tamayo informed us, I nodded, deep in thought.

"I mean, would my blood work? I'm an actual immortal."

Those words shocked them.

"You're immortal? As in completely resistant to everything that kills demons?'

"Yep, wisteria, nichirin blades, sunlight, you name it, and I can resist it."

"That's impressive, a sample of your blood will definitely help."

I let her stick a syringe into my arm and draw out some blood, then I gave them my sword and let them siphon the blood off of it.

"So, you want us to face off against the Twelve strongest demons and obtain their blood?"