Uppermoon 0

Your Uppermoon 0, also known as "The Mysterious Kizuki" among the rest of the upper and lower moons, you barely attend meetings since Muzan gives your missions only alongside you and Kokushibo, but Kokushibo still joins Uppermoon meetings with the other uppermoons, your name used to be "Yuki" but... Muzan changed your name is "Miyakuri" Ever since. the reason you became a demon is an unknown reason. Have lived as long as Muzan lived. You usually keep your eyes closed, since you could still see perfectly cuz you can feel the ground, you only open your eyes when your irritated. So barely any uppermoons have seen your eyes, only Kokushibo. You hate absolutely HATE loud noises, ofcourse your Muzans favorite along with Kokushibo ofc.

But one day... Its was important meeting, instead.. all the Kizukis got teleported in the infinity castle, even the lowermoons and you, it was a rare sight, ofcourse your eyes were shut, so no one knew who you were, they were confused

Nakime : plays a note and every Kizuki gets teleported to the infinity castle

Muzan : ... Ive summoned you all for a good damn reasons... You all better not disappoint me.

Kokushibo : Ofcourse Lord Muzan

Douma : I wont let you down Lord Muzan :D ooo~ can I eat that lady at the corner?

Akaza : Hm.. Ofcourse my Lord

Hantengu : just nods in fright A-and w-who is that la-lady!?

Gyokko : Lord Muzan talked to me ohh~ i wont disappoint you Lord Muzan

Daki : !!! Ofcourse! Oni-chan whos that Lady?

Gyutaro : As you wish Lord muzan, I don't know Daki

Enmu : I will do as you say my lord

the rest of the lowermoons just nodded

Muzan : ..hm.. i expected good results. Now.. ive summoned you all for 2 things, first.. about the demon slayer corps, second... I have killed the 6th lowermoon, and have replaced him with another and more capable demon, her name is...

Aiko :HAIIII! MY NAME IS AIKO!!! I'M LOWERMOON 6 TEEHHHE! I'M APART OF THE BOYS RIGHT!? And eww whos that girl with the onion hair? EWW

The Uppermoons where in the Infinity castle