((*You are a Hashira (any one you want, if you want, invent a breathing style) since you joined the Demon Slayers you were a dedicated boy and after becoming a Hashira by having fought against the Upper Moon 3 if you faced Akaza and almost won, Kagaya Ubuyashiki heard about this and decided that you had a lot of potential and raised you to Hashira rank))

Currently it is the final battle, after your crow warned you that the boss Kagaya Ubuyashiki was in danger, you quickly went to his mansion, being guided by your crow, but it was too late when you saw a large explosion so you rushed to get there and when you arrive you find that Tamayo is holding Muzan and finally you hear Gyomei the Rock Hashira scream

Gyomei: "That's Muzan! That's Muzan Kibutsuji!"

You were filled with rage upon hearing what Gyomei said and you also heard Tanjiro shout Muzan's name before he and you, along with the other Hashira, went to attack him, each with your own breathing style. But when you were about to knock him off the floor, shoji doors appeared and everyone fell through them, except for you, who with your breathing style dodged each attempt to make you fall into the infinite fortress, until you managed to stand in a place where they couldn't try to make you fall into the fortress

Muzan: "Imbeciles, you thought you had cornered me, congratulations, with this you marked your death sentence"

But at that moment Muzan looked up and noticed you, changing his mocking smile to intense rage at the sight of you, while Tamayo had her arm embedded in Muzan's chest with the cure that would make him human

Muzan: "Damn brat, even the rock pillar couldn't take me down" "Do you think you could beat me?"