Demon Slayers vs Daki and Gyutaro

Demon Slayers vs Daki and Gyutaro was a battle that took place in the red-light district of Yoshiwara, Tokyo. It was a large and extensive battle that focused on the confrontation between the Demon Slayer Corps and the dual holders of Upper Rank Six of the Twelve Kizuki, Daki and Gyutaro.

Prologue
For over one hundred years, the Yoshiwara red-light district of Tokyo had been the lair to two very powerful demons: the siblings Daki and Gyutaro. As the holders of Upper Rank Six and living hidden in a large urban population, they have proved themselves to be a great threat to humanity and have killed countless victims. Numerous Hashira have fallen to the two, with Daki and Gyutaro having claimed to have killed 7 and 15 respectively.

In the latest intervention by the Demon Slayer Corps, the Sound Hashira, Tengen Uzui, was tasked with investigating the city for a demonic presence. He had initially sent his three wives, Makio, Suma, and Hinatsuru, to probe about the area and send information back to him. When they suddenly stop informing him and have not been heard from since, he attempted to bring two female Demon Slayers to join him. He was instead accompanied by three Kanoe-ranked Demon Slayers; Tanjiro Kamado, Zenitsu Agatsuma, and Inosuke Hashibira. Disguising, splitting, and assigning them to the three pleasure houses that his wives had been tasked with, they began their own separate investigations. While scanning the rooftops at night, Tengen did not see anything unusual but remained worried and uncertain, believing they may be fighting an Upper Rank demon. Inosuke, inside the Ogimoto House that Makio was in, discovered her room messy and dishevelled, and a demonic presence that moved inside the walls of the building, though he was impeded in his pursuit and failed to track it downstairs in time. Tanjiro, in the Tokito House that Suma was in, detected an unusual scent that only appeared at night, but he was unable to trace it without appearing suspicious.

Zenitsu, inside the Kyogoku House that Hinatsuru was assigned to, initially struggled to look for evidence; he failed to detect anything out of the ordinary with his hearing and the recent death of his House's madam caused everyone to remain tight-lipped and afraid. Trying once more, he detected the sound of a young girl crying inside of a broken and messy room. When he tried to ask her for any clues to what had happened, he was suddenly confronted by his House's Oiran, Warabihime. She angrily confronts him for entering her room but is accosted by Zenitsu when she hurts the girl inside. Warabihime then attacks him with an unexpected punch that knocks him unconscious, though she notes that in the split second before making contact, he had gone into a defensive posture, correctly deducing that Zenitsu is a Demon Slayer. Warabihime, later revealed to be Daki in disguise, then abducts him with her obi whilst he is alone. Inosuke and Tanjiro meet up to share information, only to be dismissed from the mission by Tengen, ashamed that his want to save his wives has led to Zenitsu going missing.

Unwilling to abandon him, they coordinate a plan to re-arm and meet up to fight together. Going his own way, Tengen enters the Kyogoku House and threatens the master for information on the missing Zenitsu and Hinatsuru. The master, holding the kimono of his late wife, who was recently killed by Daki, tells him about Warabihime and Hinatsuru's location in the Kirimise. Tanjiro meets with the Oiran of the Tokito House, Koinatsu; he explains his true purpose in being in Yoshiwara and reassures her that he will save all who has gone missing. They bid each other farewell and Tanjiro leaves, only for Koinatsu to be met by Daki herself wanting to devour her. Inosuke, annoyed that Tanjiro has not followed the plan, decided to take action alone, re-arming himself for battle and continuing his investigation. Inside the ground beneath his House, he discovers a hidden underground chamber, littered with bones and housing obi with victims absorbed in them, including Suma, Makio, and Zenitsu. Tengen locates the Kirimise, where sick prostitutes are housed. He frees and helps Hinatsuru, who had poisoned herself to leave the district but was prevented from doing so by Daki. He leave her to recover and sprints atop the building's rooftops to locate the demon.

"Can I take on an Upper Rank alone?"
Only after just leaving the Tokito House, Tanjiro detects the demonic scent again, returning to Koinatsu’s room to see her getting absorbed into Daki’s obi. He confronts the demon, causing the prideful and dimissive Daki to swat him out of the building for talking to her; stunned by the impact, Tanjiro sees that the obi are her main weapons, able to absorb people through thin cracks, hence why he was unable to see how people could have gone missing unexpectedly. Setting Nezuko’s damaged box aside to protect her, Tanjiro warns her to not leave unless her life is threatened, as Daki prepares to attack him again. Leaping into the air, Tanjiro uses Water Breathing, Fourth Form: Striking Tide, Turbulent and is met by her numerous obi sashes.

Fighting mid-air, he initially struggles to cut them but succeeds in slicing one off, saving Koinatsu. Daki punches him back to the ground, mildly amused at his efforts to attack her. Still all alone, he readies himself to fight the strongest demon he has encountered thus far. Daki then hears a nearby explosion, the sound of Tengen digging into the ground with his Sound Breathing. Annoyed, she asks Tanjiro on how many Demon Slayers there are, which he refuses to answer. She offers to spare him, mockingly pointing out that their short clash has already damaged his blade. Admitting that his body is simply unsuited to use Water Breathing, Tanjiro nonetheless decides to continue fighting alone. Remembering Kyojuro Rengoku's encouragement to "set your heart ablaze", Tanjiro uses Hinokami Kagura: Raging Sun and slices Daki's incoming obi, before charging towards her and using Flame Dance, though he fails to make contact. She retaliates by stabbing him through the neck but he suddenly vanishes from view, using Hinokami Kagura: Fake Rainbow to obscure himself. Now behind Daki, he uses Fire Wheel to try and slice her neck. However, Daki proves she is still too quick and punches him away and causing him to miss. Still unused to using Hinokami Kagura, he begins to feel the strain of using consecutive forms, giving Daki the chance to charge at him with her obi dragging across the ground to shred him.

Using Recovery Breathing, he narrowly avoids getting hit. Daki then uses her obi in consecutive slashes, forcing him on the defensive and struggling to keep up.