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

First Mission

Tocho's P.O.V

Well, we got our swords.

Erika reunited with her brother, who kept freaking out around me, for some reason.

We went back to the small hut, I was fine, but Nezuko was exhausted.

I carried her most of the way back.

Tanjiro was out to greet us, and Nezuko, despite being hurt and tired, ran over to him and sobbed uncontrollably.

"I did it, Tanjiro! There's a chance we can turn you back!"

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It's been a week. Our swords finally arrived.

"Hello, I am Hotaru Haganezuka, I am here to deliver your swords." The man said at the front door.

Nezuko invited him to sit down inside, but he ignored her and sat down outside and rambled on about how a Nichirin sword is made.

"Is he always like this?" I asked Mr. Urokodaki, he said nothing, only nodded.

Finally, after about... ten minutes? He presented to me my swords, though not before looking at me strangely.

"That black hair and silver blue eyes... You're a child of darkness, aren't you?" He asked me.

I got confused, "I'm sorry, what?"

"There's a very high chance that your swords will turn out white."

Okay...?

When I grabbed the sheathes, I attached them to my lower back immediately, without bothering to unsheathe them.

"You aren't going to unsheathe them?" Haganezuka asked me.

"One at a time? No thanks, I like drawing both swords at the same time." I replied, and whipped out my swords at lightning fast speeds.

I waited for a bit, and then the color of the silver blades slowly changed into a silver blue, like the color of my eyes, it spread up the blades like frost accumulating on the swords.

Haganezuka freaked out because it wasn't white.

Then he turned to Nezuko, gave her the sword and muttered something about red hair, red eyes, and the child of brightness, then said something about her sword being highly likely to turn out red.

She drew her sword and it became black.

That made him rage even more.

But then he immediately quietened down.

"But the children of brightness and darkness in the same family?" He pondered.

"If it makes it better, I'm an adopted child." I told him.

"Ah! That makes sense. Your parents are demon tamers, then, right? They work not only with demons but also with frost as well. Did you know that before they were killed by demon slayers, they ingested demon blood? Meaning you're part demon."

I sighed, "I realized that, thanks. And, no, I'm not part demon. I'm a full demon now."

"Then the blood did come in handy, huh?"

I sighed, "Can you leave? Please? You gave us our swords. Can we go on our first mission now?"

He nodded, and silently departed.

Suddenly, our crows crowed (Bad pun, I'm sorry).

"Go to a small town in the northwest! There are rumors of demons abducting young girls there!"