With Uzui...

Uzui had located one of his wives!

Hinatsuru (The Eldest of Tengen's Wives!)

Hinatsuru: Tengen, don't bother with me. Just go, please. I know you heard that sound before. There's a demon on the loose.

Tengen: Are you really alright?

Hinatsuru: Yes. I'm sorry to have failed you.

It turns out that Hinatsuru had realized that Warabihime was Daki. But then she grew suspicious of her and followed her.

Hinatsuru had drunk poison to fake an illness to get out of House Kyogoku. When she left, Daki gave her an obi.

Uzui gave his eldest wife some antidote.

Uzui: When the antidote takes hold, get out of Yoshiwara.

Hinatsuru: Yes.

He then left and took off.

Uzui: There's a fight going underground. I can hear it.

He then took out his two swords.

Uzui: SOUND BREATHING: FIRST FORM: ROAR!

He slammed his blades onto the ground, making a loud noise.

Meanwhile...

(Y/N): So, you're Muzan's minion?

Daki: Daki of the Upper Moons. I'm ranked 6.

(Y/N): Six huh? Ha! You'll make a good practice run for Akaza.

Daki: Akaza? I used to think he was handsome. But to be honest, looking at you, you're much better!

(Y/N): Uh ... thanks.

Daki: If you agree to be my boyfriend, I'll let those two girls, and your yellow friend go.

(Y/N): And if I refuse?

Daki: Then you die.

(Y/N): HERE I GO!

You took out Rengoku's blade!

(Y/N): FLAME BREATHING: FIRST FORM: UNKNOWING FIRE!

You cut apart Daki's sash!

Daki: That power. He's no ordinary Demon Slayer!

You got close to her, but as she tried to hit you-

(Y/N): HINOKAMI KAGURA: FAKE RAINBOW!

She hit an illusion.

(Y/N): HINOKAMI KAGURA: FIRE WHEEL!

But she used her sash to stop your attack!

(Y/N): DAMN IT! She's good!

You dodged another attack from her, and soon went on the defensive!

(Y/N): She's really fast too. I need-

Tanjiro appeared!

(Y/N): YES! TANJIRO!

Tanjiro: Sorry I'm late!

(Y/N): OKAY! LET'S GET HER!

Meanwhile...

Inosuke found a hole.

Inosuke: HAHAHAHA! Yes, this hole must lead to the Demon's Nest! I sense it!

He tried to squeeze in, but only his head could fit.

Inosuke: Heh! NOTHING CAN STOP LORD INOSUKE!

He began to dislocate his joints.

Inosuke: I can dislocate all the joints in my body! In other words, if my head fits, I can go anywhere!

He squeezed through the hole.

Inosuke: HAHAHAHAHA! NOTHING CAN STOP ME NOW!

He then emerged to find a sash with human patterns on it.

Inosuke: What the hell is this? These people are alive! So that's it!

Then he saw Zenitsu, Ruby, and Weiss on it.

Inosuke: Geez. Guess I have to save you dumbasses. ALright, here-

But then the Sash started to speak!

Sash: YOU DIRTY STINKING PIG!

Inosuke: Yikes, you're ugly.

He tried to cut up the sash, but it was wriggling around!

Inosuke: GEEZ! BEAST BREATHING: SIXTH FANG: PALISADE BITE!

Sash: There's no point in slicing me up. This isn't my main body. Besides, what about the people you stole from me. Don't you care about them?

Inosuke had managed to free some of the people trapped in the sash, but he did realize that that it could trap them in it again.

And then it got pinned down by a kunai knife!

Makio was nearby, and so was the last of Uzui's wives!

Suma (The Youngest of Uzui's Wives!)

Makio: HEY BOAR HEAD! WE'RE HERE TO HELP! SO HANG IN THERE!

Inosuke: Wait, who are you two?

Suma: We're Tengen Uzui's wives! We'll do what we can, but I'm not really a fi-

She was hit on the head by Makio.

Makio: SUMA! DON'T BE SO HUMBLE!

Suma: WAAAAAAAAAH! BUT MAKIO! YOU KNOW IT'S TRUE! I GOT CAPTURED RIGHT AWAY! WE CAN'T HELP EVERYONE THE DEMON CAPTURED! AND I'M PROBABLY GOING TO DIE!

Sash: Yes, clearly you understand! Now, who shall I eat first?

But then-

???: THUNDER BREATHING: FIRST FORM: THUNDERCLAP AND FLASH: SIXFOLD!

Zenitsu appeared and started to cut up the sash over and over again as-

Weiss: WATER BREATHING: FOURTH FORM: STRIKING TIDE!

Ruby: FLOWER BREATHING: FIFTH FORM: PEONIES OF FUTILITY!

Weiss and Ruby appeared and cut it up over and over with their Nichirin Blades!

Inosuke: Heh, maybe you should just stay asleep.

Makio: Are they Demon Slayers too?

Ruby: Oh hi! You two must be Uzui's wives ... uh which ones are you?

Suddenly they heard a noise.

Sash: What was that? Is that the wind? I could have sworn that a hole opened up and-

Uzui appeared after making the noise from before.

Ruby: UZUI!

Makio: T-Tengen?!

Uzui: Makio, Suma, I'm sorry I took so long. But right now things are going to get flashy!

Suma: TENGEN!

Suma hugged her husband.

Ruby: AWWWWW!

Inosuke: YO! GOD OF FESTIVALS! THOSE WORM-BELT THINGS WENT DOWN THESE HOLES AND ESCAP-

Uzui: ZIP IT! THEY SAVED THE PEOPLE WHO WERE CAPTURED! THEY DID GREAT! DON'T QUESTION ME!

Weiss: Shouldn't we go after them?

Makio: Yes, I agree with her.

Uzui: THEN WE'RE GOING AFTER THEM!

Back with you and Tanjiro...

Both you and Tanjiro were just stuck dealing damage to the sash.

(Y/N): That damn sash!

Tanjiro: It's just getting in the way.

Daki: I didn't want another Demon Slayer to interfere! Just get lost!

Tanjiro: What do you have to say to all the people you've devoured?

Daki: Ugly creatures deserve death!

(Y/N): And you expect me to be okay with something like that?! You're insane! When someone is dead, they are gone forever!

Daki: Enough of this! I'll just-

Then when Tanjiro stepped forward, she got a good look at him.

Daki: Who the-

She saw someone else in him.

Daki: Who is that? I don't recognize that man. Wait, is this from Lord Muzan's memories? Is it the blood inside of me that's remembering him?

Tanjiro: You were human once. Weren't you? Surely you struggled against pain and suffering.

Daki: Do you ever shut up?! I don't remember those stupid memories. I'm a demon now! We don't get old! We don't get sick! WE don't ned any money or food to eat, and we never die! We stay young and beautiful forever and we're strong! We can do whatever we want! BLOOD DEMON ART: EIGHT LAYERED OBI SLASH!

She sent her entire sash at you both!

Daki: Once I finish them both, I'll go after the Hashira that's here!

(Y/N) and Tanjiro: HINOKAMI KAGURA: BURNING BONES, SUMMER SUN!

You both started to cut up the entire Sash!

Daki: AAAAAAAAAAAAAAAAAAAAAAAARGH!

She was in burning pain.

She was terrified.

Daki: NO! THIS CAN'T BE!

Then Tanjiro went for her head and as he tried to decapitate it-

(Y/N): SHIT!

Her Sash protected her!

Daki: Nice try!

Tanjiro: Her sash protects her?

Daki: YOU UGLY BRAT!!! WHY DON'T YOU JUST DIE?!

You then got the chance to pin down the sash!

(Y/N): GO FOR IT AGAIN TANJIRO!

But then he struggled to breathe!

(Y/N): NO! He's already at his limit!

You rushed to him.

Daki: GRR! YOU HUMANS ARE SUCH MISERABLE CREATURES! NOW TO-

But as you rushed to heal him, Nezuko jumped out of the box and punched Daki in the face!

(Y/N): Nezuko?!

She was angered as a bunch of memories went through her!

Nezuko: STAY AWAY FROM MY BROTHER!

Daki: Who di- YOU! YOU'RE THAT BITCH THAT LORD MUZAN TALKED ABOUT!

The two started to fight as Nezuko was soon overpowered!

(Y/N): NEZU-

You realized healing Tanjiro would help more, so you went for him.

(Y/N): She'll be okay. She'll be okay.

Daki stepped on Nezuko.

Daki: Weakling! Lord Muzan told me that you never feed on humans. So how could you escape from his control? Half-developed demons like you won't regenerate quickly. But since you are a demon, I shouldn't toy with you. I'll wrap you up in my sash and expose you to the sun!

But then Nezuko got up with her body regenerated.

Daki: What?! How did she even stand? I cut her up!

She then began to transform!

(Y/N) and Daki: WH-WHAT?!

Daki was pinned down by Nezuko!

Daki: HOW DID SHE DO THIS?!

Nezuko smiled sadistically as she began to beat the crap out of Daki!

(Y/N): Is that even Nezuko anymore?!