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

You Can't Kill My Brother!

Tocho's P.O.V

Erika and I managed to get away and out of the building just in time to see Zenitsu defending the box whilst being beaten up by a guy with a boar's head.

"I'm sorry, what's gotten into you? Attacking a defenseless guy like that, what's your problem?" I yelled at him.

"He's defending a demon!"

"A demon in a box! Said demon cannot possibly attack us unless we let him out!"

"Why are you defending it?!"

"Oh I'm sorry, that's my brother!"

"It doesn't change the fact that he's a demon!"

"He's a demon who's in control of himself! Besides, if you knew there was a demon in there, then wouldn't you also know that there is another demon in the near vicinity?"

"Of course I do!"

"Then why aren't you attacking him?"

"Because it's impossible! You're a demon, and yet you're standing under broad sunlight!"

I sighed, "Erika, go help your brother."

She scurried towards Zenitsu, who was really beat up and bruised.

"I'm going to tell you a little something here, yes, I am a demon, but I am not weak minded like them. I am in control of my actions, and I will find the demon who killed my family and make sure he dies a painful death."

"You still haven't explained how you're not burning in the sun."

"I'm part demon, part human. I have superhuman regeneration, but I do not have the weaknesses of a demon. I'm effectively immortal, which is funny, because the guy that turned me into a demon wanted to be immortal himself." 

The boar head grumbled, "Fine, I'll spare your stupid brother, but I want to fight you."

"I'm sorry, did you just insult my brother?"

"What if I did?"

I sighed, just- No. No, just no.

I took off my mask, didn't want that getting damaged.

"Zenitsu, keep my mask safe for me. I'm going to fucking murder this guy."

I cracked my knuckles, then got into a fighting position.

"Ready? Here I come."

I charged at him, ramming my fist into his chest, hearing a cracking sound.

Oof. I think I broke his ribcage.

He's still so flexible though, jeez, he completely bent over, letting his head poke out between his legs.

"I... really suggest you avoid doing that. Especially since your ribs are broken..." I muttered.

"Oh yeah? Then what about this?" He lifted his legs back over his head and got back up, completely ignoring me.

I sighed, "If that's what you want."

I charged him again, delivering a few punches at his face, all of which he blocked flawlessly, even with a few broken bones.

He swept a leg underneath me, which I barely managed to avoid, jumping back, I groaned.

"Why have you drawn your swords?"

"It'll make a more interesting fight!"

I sighed, "Whatever floats your boat, buddy."

I drew my swords, getting into my usual stance with my right sword at the front in normal grip and my left sword in ice-pick grip at the back, I crouched down a little to control my balance.