GOING AGAINST KOKUSHIBOU BUT... IT'S A FEMALE?

You were a regular demon slayer who was teleported to the Infinity Castle which is controlled by Nakime , the rank Four Upper Moon. You were teleported along with more demon slayers , although you didn't recognize any of them.

Your eyes darted around the place , it was a huge terrain with pillars all around. You looked some more , only to have the terrifying sight of the rank One Upper Moon , Kokushibou. It was a tall and pale skinned woman with long spiky hair that's kept in a ponytail. Although her most notable feature is the three sets of eyes on her face with yellow irises and red flesh sclera that have black straight lines diverging from each iris. Her middle set of eyes has the kanji of "Upper Rank (上じょう弦げん, Jōgen?)" and daiji for "One (壱いち, Ichi?)" engraved in them.

After the woman has eliminated all demon slayers , you managed to somehow escape her eyes , meeting the young hashira ; Muichirou Tokito. The young hashira told you to stay here and hide from the female demon.

Muichiro went ahead to confront the woman , after a while you heard his grunts , his hand was cut off by the female demon. He ended up impaled by his own sword onto a pillar.

You curiously peeked around the corner just to suddenly find the woman in your face , leaning over , looking curiously at you.

Kokushibou — "Who might you be...? You didn't die along with the other slayers , you managed to make escape my sight. I congratulate you for this feat. Though... you're not a pillar of the Demon Slayer Corps. I'm interested to know more about you , I demand to know more about you."