Daki/Synopsis

Entertainment District Arc
Walking with several assistants, Daki passed under Tengen Uzui's watchful gaze undetected in her oiran guise. Later, using her sash, she questioned Makio about the letters she had been sending. Sensing Inosuke Hashibira's presence, Daki's sash fled.

Daki appeared behind Zenitsu Agatsuma as Warabihime, demanding to know what he was doing in someone else's room, and quickly grew irritated at his lack of a response. She extended this irritation to two girls who tried to defend Zenitsu, insulting the young Demon Slayer before viciously abusing a crying girl for not cleaning a room fast enough. Her anger grew as Zenitsu grabbed her wrist to stop her cruelty.

Daki hit the youth through several walls, threatening him with further discipline, but stopped when the master of the brothel begged her to. Apologizing to him, she ordered Zenitsu's wounds to be treated and the mess from her fit of anger cleaned up. The Upper Rank then pondered over Zenitsu's identity, noting he might be a Demon Slayer. Later, in her room, she gloated over the success of her plan, promising to kill and eat all of her enemies.

Daki then appeared behind Koinatsu, seeking to eat her before she left to be married. She was then confronted by Tanjiro Kamado while restraining her fellow oiran and questioned him about the amount of backup he had, including when the Hashira would arrive. Dismissing the youth for his weakness, Daki soon grew enraged when he demanded she released Koinatsu and attacked the Demon Slayer with her sashes. Noting that he had survived, she complimented Tanjiro's eyes, wishing to eat them. She briefly clashed with the young Demon Slayer again, noting his skill in only severing the section of sash containing Koinatsu, but confidently proclaimed his doom regardless.

She then expressed irritation at her foes' interfering actions, asking Tanjiro about his backup again. Despite his refusal, she offered to let him live if he told her, noting that in their brief clash his sword had been chipped. She also stated that whoever had forged the blade was a terrible blacksmith, and quickly grew irritated once more when her opponent denied this, promising to kill him with her next attack. Launching said attack, Daki was shocked when Tanjiro cut through her sashes with a Hinokami Kagura technique. Noting the change in his sword style, she dodged his next attack, countering with an attack of her own. Missing due to another Hinokami Kagura technique, the Upper Rank turned to face her opponent just as his blade struck her neck.

Before Tanjiro's blade can connect with Daki's head, the Upper Rank deflects his attack and sends him flying while remarking that Tanjiro's slow moments bore her. As Tanjiro attempts to prepare another attack but fails because of exhaustion, Daki quickly approaches him while Tanjiro manages to recover and narrowely avoid her attack. Daki and Tanjiro continue to clash, while the Upper Rank remarks that Tanjiro's persistence is making the battle fun. As breaths fumes out of Tanjiro's mouth, the Demon Slayer chargers forward, to which Daki says repulsive things are still repulsive even if they try their best.

While a battle rages on between Inosuke Hashibira and one of Daki's sentient flesh Obi, Daki commands it to capture Inosuke alive and tells the sash to eat as many humans as it wants (except the ten prettiest ones) to strengthen its own power to fend of Inosuke. After the battle continues for a while, Tengen Uzui arrives and quickly subdues the sentient flesh Obi which returns to Daki who is still fighting Tanjiro. Suddenly, Daki disappears as Tanjiro attempts to strike her, appearing on the roof of a nearby building while her hair turns white as she regains her full power. As a bystander berate Tanjiro for causing a ruckus, Daki unleashes a wide-ranged sash attack that destroys the nearby buildings and kills several civilians while also making a deep cut in Tanjiro's left shoulder.

Seeing the destruction she has caused, Daki contently walks away before Tanjiro yells out to her, to which the Upper Rank reacts in an expaserated manner, spweing that the lives of ugly humans have no value. Suddenly, Tanjiro appears behind Daki, grabbing her leg as he attacks her. Daki ducks and uses a sash to deflect the attack before jumping away, having her leg ripped off by an enraged Tanjiro in the process. Daki swiftly regrows her foot while recalling Tanjiro's words from a swordsman that Muzan Kibutsuji has met before, the memory being left in her cells. After Tanjiro brings up Daki's human life, she punches a hole in the roof before saying that she doesn't remember her human life and being a demon in the present is all that matters. She continues saying that demons don't get sick, old, don't need money to eat, don't lose anything and that demons can do whatever they want.

As Daki finishes speaking, Tanjiro rushes forward and Daki unleashes her Eight-Layered Obi Slash technique. Daki remarks to herself that her Obi has been spread across the city to take control of Yoshiwara, and now that the sashes have returned to her, she is much more powerful. Daki continues by saying since Tanjiro barely managed to survive while Daki wasn't at full power, its impossible for him to win and declares that she will cut him up along with his blade and head for the Hashira. Contrary to her expectations, Tanjiro uses Burning Bones, Summer Sun to slash up her sashes, to which Daki thinks is impossible. As Tanjiro continues his relentless onslaught of sword slashes, Daki feels confused as to why he isn't feeling the pain of getting wounded by her sashes and is instead getting faster. Tanjiro's blade manages to reach Daki's neck, but the Upper Rank transmutes it into an Obi sash to lessen the effectivenss of his slash attack, preventing Tanjiro from decapitating her.

Realizing this, Tanjiro hops away while Daki tries to attack him with thirteen sashes. Tanjiro expertly parries all of them into the same spot, and pierces all of them into the ground. Daki arrogantly remarks that she will just simply blast him away, but realizes that Tanjiro has pulled them taut so they can't stretch and bend. Suddenly, Tanjiro backflips into the air and cuts up all of Daki's sashes and running up to Daki poised to slash off her neck all in an instant. Just then, Tanjiro collapses to the ground and starts violently coughing up blood. Seeing this, Daki remarks that humans are miserable before remarking that she will slice off his head.

Unbeknownst to her, Nezuko Kamado appears behind Daki and destroys a chunk of her head with a kick. Daki jumps away while restoring her head, before realizing that Nezuko was the demon Muzan told her to kill. Nezuko rushes forward and prepares to attack Daki, before the Upper Rank cuts off her leg and slices her torso in half, sending her flying into a nearby building. She mocks her for being weak and being a half developed demon, since she hasn't eaten any humans. Daki continues to provoke her and cockily says that she will not fight Nezuko anymore, and will instead absorb her and expose her to the sun to die. However before Daki can say anything else, Nezuko comes out from the rubble and regenerates her leg in an instant, leaving Daki stunned at her abilities. Nezuko proceeds to instantaneously regenerate her arm, which was cut off as well, leaving Daki uneasy as she realizes that her regenerative abilities are on par with an Upper Rank Demon.

Nezuko's body transforms as she breaks her bamboo muzzle, a horn grows out of the right side of her forehead and her body also becomes covered in ivy-like demon crests. Daki gets more intimidated by Nezuko's change in aura and she tries to defend herself from one of her kicks, successfully cutting it off with her obi. However before she can cut Nezuko's head, Daki is still smashed into the ground by Nezuko's kick. Daki is shocked as Nezuko's leg pierces through her body, pinning her into the ground. She tries to make sense of how Nezuko could've attacked her with the leg she had just sliced off, but lately realizes that Nezuko had instantly regenerated her leg within that moment, admitting that Nezuko's regenerative abilities are greater than her own.

As Daki remains pinned on the ground, she uses her Obi to try to free herself from Nezuko's hold. Her Obi effectively severs multiple limbs from Nezuko's body but before she gets a chance to scoop them up, Nezuko's severed hand grips onto her Obi. Her limbs remain connected by her unusually solidified blood, with some of the blood falling onto Daki. In an instant, Daki is set on fire by the blood causing her to scream out in agony. Nezuko's limbs wind back to reattach to her body and they self cauterize each cut, she proceeds to forcefully stomp down on Daki's head causing it to erupt in flames. Nezuko continues to stomp multiple times on her head before she kicks forcefully kicks Daki through a nearby building, and into the one behind it.

As Tanjiro struggles to keep Nezuko from attacking, Daki barges into the room they are in with sections of her body burnt off. She is seen seething with anger as she is forced to regenerate her burned body, and angrily approaches the siblings. Tanjiro becomes conflicted on what to do as he realizes that there are nearby bystanders he needs to protect, but also needs to defend Daki's attack without releasing Nezuko. As Tanjiro makes his decision to protect the public, Tengen Uzui suddenly appears before him and expresses his surprise at Nezuko's "flashy" demonization. Tengen goes on to comically berate Tanjiro for speaking highly of Nezuko's ability to restrain herself back at the Ubuyashiki estate, despite him struggling to restrain her now. Daki sees Tengen and excitedly reacts to Hashira arriving before her, but is coldly told to shut up. Tengen tells her to scram and says that she is too weak to be an Upper Rank demon. As that happens, Daki's decapitated head falls onto her lap, leaving her stunned as to what had just transpired.

Daki screams at Tengen for cutting her head off, and he responds by telling her to die quietly. The enraged demon reminds him that he had denied her Upper Rank status, which he affirms, but she proceeds to insist her status, much to his annoyance. To the Hashira's astonishment, Daki begins to throw a tantrum and cry, and he notes that she has been talking for far too long when she should have showed signs of dying. Still throwing her tantrum, Daki calls out to her elder brother to save her and a male demon begins to emerge from her body. Tengen senses the danger and attempts to immediately attack the two, but his blades hit nothing but air as the Demons disappear from his sight. On the other side of the room behind Tengen, Gyutaro comforts Daki, asking that she at least try to reattach her own head. Tengen wonders why Daki is still alive after being beheaded, as well as the presence of the new demon, who he comments as having great reaction speed. Gyutaro tells Daki to heal her burn, complimenting her good looks, and wounds Tengen when he attempts to attack them again. Daki tells her brother there are more demon slayers, asking he kill Nezuko who burned her and claiming she tried to do her best but "everyone got in my way and bullied me".

After Tengen causes an explosion, Daki protects her brother by forming an Obi sash around both their bodies, their bodies' unscathed as they confidently proclaim that they fight as one. In the present, Gyutaro notices the deterioration in Tengen's physical state and becomes gleeful when he realizes that his poison is slowly taking effect. Tengen proceeds to refute his claim saying that he is still in pristine condition and charges forward to attack the siblings. As they engage in a battle, Tengen manages to kick Daki away from Gyutaro and releases numerous dark beads which cause a cluster of explosions. As both sides reassess the situation, Daki is left whining as she pathetically reattaches her head to her body once again. As Daki finishes reattaching her head, she loudly doubts Tengen's words that the Demon Slayers will win by saying that they can't win since he has been poisoned, much to the horror of Tanjiro.

Gyutaro and Daki get riled up and reveal that they've eaten 15 and 7 Hashira respectively, and begin to attack the group. As Daki attempts to attack Tengen and Tanjiro from behind, Zenitsu bursts through the house within seconds to block the attack as Inosuke follows him. Now on the rooftop, Daki finally recognizes Zenitsu from the Kyogoku House and he demandingly commands her to apologize to the girl whom he had found crying earlier. She mocks his speech by revealing that women are treated like merchandise within the district and as the orian, she was allowed to do as she pleased with other people since she was the main breadwinner of the house. When she looks up at Zenitsu, a third eye appears on Daki's forehead revealing that Gyutaro can see them via her new eye.

As the battle continues, Daki and Gyutaro coordinate attacks to drive the Demon Slayers into a corner. As Tanjiro was about to leap down a roof of a building to assist Tengen, a voice can be heard telling them to watch out as Inosuke and Zenitsu crash onto the roof while fighting the Obi. Inosuke and Zenitsu ask Tanjiro for help in order to defeat Daki, and agrees asking that they finish quickly in order to help Tengen. Hinatsuru tells the boys that she will hide quickly in order to allow them to focus on the battle, and disappears as they face Daki. She gets excited when Tanjiro joins their fight and informs his comrades that they need a fast attack in order to cut her neck. Inosuke realizes that she has slowed down and decides to go first to attack as Zenitsu agrees with Tanjiro to protect him from behind. Inosuke proceeds to dash forward using Beast Breathing, Eighth Fang: Explosive Rush while Zenitsu and Tanjiro use Thunder Breathing, First Form: Thunderclap and Flash, Eightfold and Water Breathing, Third Form: Flowing Dance respectively, to protect Inosuke from the Obi.

Daki begins to crack under the pressure as Inosuke close in on her, and manages to draw both of his blades on either side of her neck. Inosuke buries his heels into the ground as he uses Beast Breathing, Sixth Fang: Palisade Bite to effectively decapitate Daki. Tanjiro smiles with joy as he witnesses Inosuke leap and catch Daki's head in the air, rejoicing at successfully cutting off her head. Inosuke claims they have to act fast and keep her head separated from her body. Having successfully decapitated Daki, Inosuke can be seen escaping with her head in order to prevent her from reattaching it to her body. He tells the other boys not to worry about him and to instead help Tengen, but before he can get to safety, Daki uses her hair to put up a resistance. He manages to put a stop to her resistance but before he can get away, Gyutaro appears behind him and impales him through the chest. Tanjiro looks on in horror as Gyutaro grabs Daki's head while Inosuke collapses on the roof.

As Tanjiro tries to behead Gyutaro after landing a surprise attack on him, Daki can be seen rushing to her feet at the sudden change of events to try to help her brother, but before she can get close to them, Zenitsu manages to free himself from the rubble. He attacks her by using Thunder Breathing, First Form: Thunderclap and Flash to bring her attention to him and then uses his Godspeed extension to quickly attack her neck. Zenitsu pleads with his blade to cut through her neck, since he was given the chance to escape the rubble and attack her while Gyutaro was subdued.

While Tanjiro and Tengen fend off Gyutaro and try to decapitate him, Daki can be seen resisting Zenitsu's attempt to decapitate her. She attempts to use her obi to kill Zenitsu at close range, but Inosuke unexpectedly rushes up revealing that he protected his heart from being stabbed by rearranging his organs. He also reveals that poison has no effect on him since he was raised on the mountains, before proceeding to assist Zenitsu in decapitating Daki. The three boys let out a roar as they muster out the strength to slice through the Demons necks. After the long battle, Zenitsu and Inosuke manage to decapitate Daki up on the rooftop while Tanjiro can be seen decapitating Gyutaro simultaneously on the ground.

Her decapitated head then fell to the ground, facing the head of Gyutaro. As their heads began to disintegrate, Daki screamed at her brother, blaming him for their defeat and claiming that "an unsightly thing like [him] could never be [her] sibling", while Gyutaro retaliated that Daki was weak and did nothing to help. Saddened by the siblings' bickering, Tanjiro then stepped in, covering Gyutaro's mouth to stop him from screaming abuse at his sister and pleading with them to try and get along, as they only had each other left in the world. Daki began to cry, wailing that she didn't want to die; however, her head finally disintegrated, leaving Gyutaro alone. As Gyutaro began to remember their life before becoming demons, Daki appeared to him in her original form as Ume, asking him where they were going and to take her along with him. He initially rejected her, sharply telling her not to follow him. However, Ume suddenly embraced him tightly, apologizing for her past words and crying out that they were siblings and she would never let him go. The pair then departed to the afterlife, with Gyutaro carrying Daki on his back as he had always done before.