~The day I met you~ A demon slayer Oc fanfic

-Backstories pt 1:Leo-

Just to be clear, I kinda made the backstory for Leo based on what Eli/-Leo-Shizukami- told me! So, Here's Leo's backstory!

(Leo):

It was cold, I was cold...I couldn't tell if it was because I was dying, Or just because of the weather. I opened my eyes only to find an empty darkness. Was this hell? Or something else? I thought I was truly dead, Until I heard someone shouting. Ugh, Annoying..." Wake up! Damn it! Wake..UP!". I felt the energy come back to my body, and I slowly opened my eyes. 

A girl-No, A Boy stood in front of me, His raven color hair was sort of long, and it was held in a low, messy ponytail. I looked up, Into his Deep, Ocean colored eyes. As I remembered the deaths of my family last Night to a creature I didn't know existed, I was sad..Or was I? I couldn't tell if I was sad, Or something else..either way, I felt empty and hollow inside. The only survivor I could think of was my older brother, Shiro, But even He happened to die.

 The man in front of me...reminded me so much of him...I couldn't take it...I felt empty, as if my entire life was a joke...That I wasn't even real...I continued to space out, and then I felt a hand slam across my face, Snapping me out of it."H-Huh? Wah?!" I held my hand to my face. "Sorry, That was the only way I could think of to get you to listen...you were spacing out and wouldn't listen" Replied the Raven haired male. "O-Oh..sorry-wait...who are you anyway?" I answered with a stoic face such as his. "Me? I'm Giyu. Giyu Tomioka of the demon slayer corp."

 I Looked up at him with my expression changing to a slightly shocked one. The demon slayer corp...I've heard about it before from my father, who died of an illness a while back. The corp was an organization unknown to the government, who hunted down man-eating demons in the brink of night, considering they only come out at night, Due to the sun burning them to ash, where not even the bones of their bodies remain.

"Now, If we're asking names, who are you, Kid? I didn't kill that demon following you just to let you walk away..." Giyu asked the boy in front of him with his expression not changed at all. "O-Oh! R-right! I'm Leo! Leo Shizukami!Oh and...Thanks for killing the uh 'demon' that was following me Ni-..."I almost did that? I almost called this man my brother...I have to give it up, they're dead, I'll have to deal with that."Mr. Tomioka!"I replied.

 "There's..No need to thank me...Also, What did you almost call me?..I heard 'Ni' but nothing else....I think I know...And If you're willing to....You could join the corp.....Maybe after you've joined, I'll let you call me that...your brother..?"My eyes widened. Join the corp? And Call this guy my brother if I make it in? I can't...It's no use....I....."I accept!"