Displaced demon

Hi there, my name is Jack smith, and im a 24-year-old man. I have pale skin, blue eyes, and black hair, I stand at 5'11 inches, and im currently cosplaying as kokushibo from the demon slayer manga.

I was able to find an accurate outfit online but it didn't have the sword, as for the eyes I face painted them on and put custom contact lenses on.

I was walking around an anime convention I saw a stall selling many katanas. I walk over and look around, the man behind the stall was dressed as Hotaru Haganezuka.

"looking to buy one of my precious swords?" he said in a surprisingly accurate impression of the blacksmith.

"yeah, I was wondering if you had kokushibos katana?" I say while looking around his stall. He grabs a bright pink sheath with yellow eyes with red irises from under his stall.

"that will be £100." I grab my wallet and hand him the money, "thanks mate" I say while walking away, sheath in hand. I slowly take it out to reveal a magenta katana, the bottom portion of the blade is pitch black and the same eye pattern on both sides of the katana with black cracks coming out of each one.
The hilt is purple and the handle is pitch black, the hilt and handle have the same eye pattern.

My vision suddenly became very blurry and I slip into unconsciousness.

(Equestria, Celestia POV)

I watched in horror as my sister became enveloped in a dark vortex, I gasped when I saw what my younger sister had become.

"luna, what have you done!?" I shouted in worry and fear, she looks at me with a dark and sadistic grin.

"you old fool, luna is long gone." the dark being laughed at the sun goddess.

"My name is nightmare moon, and I shall destroy you with the power of darkness!" lun-nightmare moon said while a dark spear forms out of the shadows behind her.

As nightmare moon summons her weapon I start to make mine, casting a quick summons spell, my Warhammer appears in my hands.

Nightmare moon grins at me and without hesitation, she flies at me, with the intent to kill. I rise my Warhammer high, intent to block the attack. But a sudden voice followed by many crescent-shaped objects suddenly hit nightmare moon.

(nightmare moon POV)

I ready my spear and grin at Celestia as she summons her Warhammer, I flap my wings and dash at the sun monarch. Just as I was about to spear her neck.

suddenly many forces hit me in the side, which caused me to fly into the wall.

I glared at the thing which caused the interruption, only to find an odd creature with a katana.

It looked like a furless monkey with pale skin and long, spiky black hair with red tips which was kept in a ponytail. It seems to wear a purple-and-black-patterned kimono and black hakama pants bound with a white fabric. But the most notable feature is the three sets of eyes on its face with yellow irises and red sclera that have black straight lines diverging from each iris.

(Jack POV)

My vision slowly returns along with my other senses, but something felt off. It was like my body was just better, I had a few health problems before.

I had a bad case of asthma, a tumor had formed on my left arm, my right lung was damaged and I had an infected toe on my right foot.

But as i breathe in and out I can't help but realize what just happened, 'was that the merchant, from those mlp fanfics, but how, wait I dressed up as kokushibo, does that mean!' i get up and notice a pond, rushing over I peer into its surface. I had 6 working eyes, both of the middle eyes contain a Japanese symbol which I could only imagine meant "upper rank one"

"I'm kobushibo, in the my little pony universe, fuck sake," I say in annoyance, I wasn't a brony by any stretch of the imagination, but I knew the show and the fanfics thanks to my little sister wanted me to read her an mlp based bedtime story.

At first, I was stumped until I found out that fanfic.net had an mlp search option, so I stole a bunch of them, mainly ones that had lots of words and that were wholesome so she could sleep.

'out of all the worlds, why this one, why not demon slayer, or mha or hell I'll gladly go with being in "the boys" universe but why here?'

As I stand up I grab my katana and un-sheath it, 'since I'm kobushibo, does that mean I can use his breathing style and blood demon art, or do I have to learn them?' i swing my sword around for a bit, and then got into a battle stance.

Taking in a deep breath I try and remember an easy moon breathing style, I slash swiftly in a singular horizontal motion in a crescent shape.

"First Form: Dark Moon, Evening Palace"

As if by magic, numerous chaotic crescent blades are launched from the original slash into whatever was in front of me.

They tore at the earth, cutting trees down as if they were made of wet paper, and threw rocks leaving behind a clean cut.

I kinda just stood there, all 6 of my eyes wide in shock and awe, 'h, how?' i put my katana back, while still in a shocked state.

As I'm standing there, still trying to process that I'm the upper rank 1 demon a sudden shout catches my attention.

"luna, what have you done!?"

I look in the direction of the shout to see a castle, rushing over I quickly hide behind a pillar, only to see 2 anthro horses talking, looking at their bodies I quickly understand who both of them are, and what era of the mlp universe I was sent to.

"fuck" was all I could say.

She flaps her wings and dash at the sun princess.

"First Form: Dark Moon, Evening Palace"

The many crescent-shaped attacks hit nightmare moon and she is sent flying into the wall.

Celestia looks at me and her eyes widen as her eyes take in my features, nightmare moons gaze falls upon me and while having both of their attention I decided to say something.

"your lighter than I thought"