Kimetsu No Yaiba: The Tale Of The Lunar Slayer!(OC X Demon slayer)

Part 4: Solo Mission

Upon arriving at the Entertainment district ,yuzaru,Upon Arrving,Creates a bit of destruction outside the district.
She puts on clothes that would make her be seen as a high status from another area.
She questions everyone she could find about any supernatural Events.
She waits until night and Uses her Modified version of destructive death,Which now enhances her speed,strength,Endurance,regeneration,and Senses anyone who is stronger then normal.(So she can sense those who are as strong as a LM1 Demon and Above.)
She senses Daki and immediately kidnaps every resident nearby and inside the house Daki is in.
She shows them the destruction outside the district,Using it as Planted fake evidence to make them evacuate the city.
She does the same to the rest of the areas until the area is nearly empty.

She attacks Daki and this leads to a fight. Daki, immediately absorbs all her belts,And starts fighting back,Though it would be useless,As yuzaru is too strong for Daki.

Gyutaro of course appears,And absorbs Daki(gyutaro is upper moon 5/4 if he absorbs Daki.)
Yuzaru struggles against him,as she isn't too experienced enough with her abilities.
She decided to try a technique.

Water Breathing, Tenth Form: Constant Flux.
An attack that increases in power overtime.
With her constant evolving over time,she was starting to bear closer to his strength with this form. But he ends up managing to catch her sword and throw it away,before she could reach his neck.
She was now losing,But,For some reason,She wanted to look at the moon,As if it was her last time doing so. Then She Used her Compass needle,But..Something odd happened.
She stopped,and looked at the ground,and then gyutaro,with a menacing stare..
And her Eyes.
Had Became blue,And Had ' Upper 2' On Them..
After her transformation,Gyutaro wasn't even a challenge,She simply froze him,and then absorbed him.
Afterwards,she blacks out,And Yuzaru had no recollection of what happened after looking at the moon and using her Compass needle,And Just remembers absorbing gyutaro,And Being a lot more powerful. She grabs her sword and sheathes it,And tells the residents that the demon has died.
She goes back to the corps,And informs the hashira of the abnormal event,which does shock them,but they speak of the transformation as a good thing,because of the sudden growth in power.

Shinazugawa,After hearing about this,Asked to see if he could see her use this,After finding out she doesn't know how to do it at will,He tells her to fight him.
She is shocked but does not want to say no to him, And she,at first,only uses her sword and Non-Demon Art techniques.
After a while of trading blows,She decides to use Her compass needle,While staring at him,But instead,The same thing That happened the night before,Reoccurs.
But this time,She just stared at Shinazugawa Menacingly,And then returned back to normal.
Shinazugawa and the others are quite confused,But it confirms that most of what she said is correct,The menacing stare and stance,The colour change to blue and the 'Upper 2' on the eyes.
They stop making theories,and conclude that the state is either a transformation,or a Defense mechanism.
Yu Called it: Demon(ic) instinct.

Yuzaru decides to take a break from fighting so many upper moons for a while(maybe a few weeks.)

Words from the Author

Hello! I'm sorry that this story is so short.
I just really wanted to release it because I really liked how it was to me,please give me some notes and tell me of any mistakes I make in the story! I'd really appreciate it!
Originally I was going to skip part 0,But I liked the idea of making Yu's Orgins and such.
And I hope you liked this too,but for now..
To Be Continued..