The Girl who shouldn't exist (POKÉMON X KNY)

KNY MANGA SPOILERS.

Have you heard the legends of the girl who shouldn't exist..?

Huh?

Rumours say that there is a girl who has roamed the earth for thousands of years, since even before Pokémon.

[Pokémon and kny don't belong to me obviously]
Takes place near the start of master journeys cause That's where I'm at, I need to catch up on journeys lmao.

INFO:

This is an oc story! Sorry if you don't like that stuff I just always insert myself/an oc to represent my self in everything (I maladaptive daydream) and it's probably cringe, Oc is muzans daughter (Ik cringe) and didn't die in the final battle.
CROSS POSTED TO AO3

Uh so Im obsessed with Pokémon and demon slayer and there's no crossover fics for these so im gonna write one ig, also why isn't there more kny crossover fics there's so many logical explanations for it, you want to do one with the moons/muzan? Boom they didn't die in the final battle and second fandom Is in the same universe but the future. Hashiras/slayers? They became demons. You don't like that? Blood demon art sent them to the future or to another universe where other part of crossover is.