Daki

Daki is one of the primary antagonists in the Entertainment District Arc of Demon Slayer: Kimetsu no Yaiba. She is a demon affiliated with the Twelve Kizuki, being the secondary holder of the position of Upper Rank Six (の), a position she shares with the primary holder, her older brother, Gyutaro.

Appearance
Daki is a tall, fair-skinned woman with lime green eyes and long eyelashes. Her hair is white with a lime green ombre at the bottom and is styled in a full, long ponytail and with kanzashi hairpins (three on each side) holding up the ponytail. The kanji for "Upper Rank" is engraved in Daki's left eye and the kanji for "Six" is engraved in the other. When not disguised as a Oiran, she sports a pink flower-like demon crest on her face, and wears a two-piece version of her kimono consisting of magenta pink panties tied by long, black bows on the sides and with two magenta pieces of cloth that cover her chest. She has magenta thigh-high stockings with black flower patterns and tall three-legged koma-geta/mitsu-ashi shoes.

When she is first introduced as a Warabihime, she appears to abide to the characteristics of the oiran/tayū, her hair being the typical date-hyōgo style having numerous Ōgi bira kanzashi both decorating and supporting it as well as wearing traditional makeup. She wears a layered kimono with different flower patterns on it, keeping fragments of her Blood Demon Art as her obi.

Before she turned into a demon, Daki was a young girl with long, disheveled white hair with messy bangs along with dark lipstick. She wore a torn, light kimono with an irregular square patterns with a horizontal lines across it.

Personality
Daki is a very prideful and sadistic person, taking enjoyment in toying with her victims before killing them. She seems to have a somewhat caring relationship with her brother, Gyutaro, though she has been seen insulting and ridiculing him when they both fail, showing that despite her love for her brother, she isn't above ranting and lashing out at him, as shown how when she spoke cruelly of him upon their defeat, even insulting his appearance and viciously claiming that he couldn't possibly be her brother.

However, underneath her malicious personality, spoiled attitude and selfishness, Daki is shown to possess a strong genuine love for her older brother, as seen during her time in Limbo, where despite Gyutaro attempting to sever ties with her and try to send her to heaven, Ume stubbornly refuses to abandon her brother, even if it meant going to hell together with him. Having tearfully reminded him that no matter what happened to them, they were at their strongest together and promised that no matter how many times she died and was reborn, she would always be his little sister.

As a courtesan, she seems to have a seductive side as seen during her typical interactions with her male clientele. Despite being hundreds of years old, she has displayed childish and brattish tendencies such as throwing tantrums and crying hysterically when things don't go her way and lash out against anyone to vent her frustrations. During her usual interactions with her brother and fellow courtesans, Daki typically acted something akin to a spoiled, arrogant and bratty child. These childish tendencies may be due to the fact that she was only a thirteen-year-old girl when she was first turned into a demon.

It was noted by Gyutaro that as a human she possessed an easily influenced, honest personality, causing her to easily take up the personality traits and words of those she trusts and admired to heart, as seen when she was easily influenced by Muzan. Her brother Gyutaro himself believes that the sole reason why she is like she is now was due to her being raised by him to be selfish and to only worry and care about herself due to taking to heart his words of "take before you're taken from", resulting in her current personality.

Human Life
Daki was born many years ago with the birth name of "Ume" in the Entertainment District's Rashomongasi (Lowest Caste) area, where only sick prostitutes, geishas and oirans who could no longer work in the brothels were sent and left to die. Her birth mother was a prostitute there, having given birth to her elder brother a few years before. Her biological father is never mentioned, but was likely one of her mother's customers. Her brother noted their mother to be severely mentally unstable (most likely due to the district's extremely harsh and poor living conditions), having attempted to kill herself and her son numerous times as well through possible miscarriage. She also physically abused him due to not having the finances to keep him fed, forcing him to fend for himself. When Ume was born, their mother hated her due to her hair color and eyes and would try and kill her. One day, their mother tried to cut Ume’s hair off with a razor, but Gyutaro became enraged and went on a rampage. This lead to their mother distancing herself from them. Ume was primarily raised by her elder brother until her early teen years, when her mother passed away from the disease Ume, the same sickness she was then named after.

Gyutaro noted that, even as a young child, Ume had an incredibly beautiful face that even grown men and women would falter from looking at. She was so beautiful that if she smiled, she would be given things; leading to the nickname Shiraume. This gave him hope that the both of them could rise from poverty and be able to lead a better life by being scouted and eventually recruited to work in one of the most prestigious Brothels of the district. And just as he had hoped, Ume, in her early teen years, was finally chosen to work in one of the Entertainment District's High Class Brothels. She began receiving proper education, taught the proper skills and fed the finest foods in her training to become a Oiran, and even before her training was even completed, Ume had already begun making a fortune by attracting many suitors and customers to the brothel, due to her beauty. At the same time, her elder brother began working as her "Collector" and would collect money and debts owed to the brothel.

However, this all came to an end when Ume, poked out the eye of a samurai, a customer of hers, when he insulted her brother while her brother was away collecting debts. In retaliation to this, she was tied, bound, burned alive and left to die in a ditch. She was then discovered by her brother, who began to hysterically panic upon seeing her near-death state. They were then discovered by the same samurai she blinded, accompanied by the Manager of the House she worked in. The pair attempted to kill both Ume and Gyutaro, only to be killed by her brother instead, who then picked up his sister’s charred body and carried her around town in search of help. His struggle turned out to be in vain, as he came to the realization that no one would help them.

As Gyutaro collapsed from exhaustion and fatigue from his severe wounds, Doma, who was Upper Rank Six at the time, happened upon the siblings while wandering the district in search of beautiful Geishas to devour. Taking pity on them, he offered to help the pair by turning them into demons, claiming that it was because he was a "nice guy". He then challenged them to become strong enough to be chosen by Muzan Kibutsuji and join the Twelve Kizuki alongside himself.

Demon Life
Many years after becoming a demon, Daki had already gained a reputation for her cruelty, such that senile elders remembered her ill-temper and demanded for "hime" (meaning "princess") to be added to her name. The activities of both her and her brother eventually caught the attention of Muzan Kibutsuji, who acknowledged their strength and power and officially allowed them to join the Twelve Kizuki and both were given the rank of Upper Rank Six.

At some point, Daki fought, killed and ate seven Hashira.

Two days before Tanjiro Kamado and company infiltrated the Entertainment District, Daki was confronted by Omitsu, the manager of the Kyogoku House, over her abuseful treatment of the staff. When the hostess revealed her knowledge of Daki's past and extended lifespan, the Upper Rank seized her. Carrying her far above the district, Daki mocked Omitsu for her stupidity, labeled her as inedible, and dropped her to her death. Returning to her room, Daki was surprised to see Muzan Kibutsuji. Bowing to her master, she listened as he praised her for her new-found strength, cautioned her against getting careless, and stated his high hopes for her as a special Demon.

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.

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.

Abilities
Overall Abilities: As an Upper Rank demon, Daki is very powerful, having been personally acknowledged by Muzan himself as being a "special demon". It has been noted that Daki was able to kill and eat seven Hashira in the past, further exemplifying her strength. Her flesh detachment in the form of an sentient Obi sash was strong enough to hold off the combined efforts of Zenitsu Agatsuma, Inosuke Hashibira, Makio and Suma, the former two being seasoned Demon Slayers while the latter two being kunoichi with shinobi training. Meanwhile, a weaker Daki was already a hand full for Tanjiro Kamado who had begun to actively use the Hinokami Kagura in combat.

After her sentient flesh Obi spread across the entire city returns to her, Daki's power dramtically increases, so much so that her speed in this form was incomparable from before. In this form, her sashes also become more durable, allowing them to slice Nezuko Kamado's body in half and destroy buildings with ease. Furthermore, once Gyutaro's eye is implanted in her, Daki's power is amplified once again, giving her improved speed and reflexes that can outclass the likes of Zenitsu's Thunderclap and Flash technique. This also allows Daki to coordinate her attacks with her brother, drastically increasing their offensive output and easily turning the tables against the combined efforts of Tanjiro, Zenitsu, Inosuke, and even Tengen Uzui, the Sound Hashira.

Decapitation Immunity: Daki has a unique immunity to decapitation by Nichirin Swords thanks to her connection with Gyutaro, whether it be when he is "sleeping" inside of her or when his "core" is implanted inside of her body. This is showcased when, despite being repeatedly decapitated by Tengen and Inosuke, Daki's body showed absolutely no signs of disintegration. As the Demon Slayers quickly realize, the only way to bypass this immunity is if Gyutaro himself is simultaneously decapitated alongside her.

Extrasensory Perception: Daki has the ability to share her senses and mind with her elder brother, and also allow him to control her body by implanting one of his eyes into her forehead. Through this eye, she can send him logistical information through this link in order for them to better coordinate their attacks. Furthermore, through her sentient Obi sashes, Daki can gain information from multiple places at once, even being able to telepathically communicate with it. As her Obi sashes were able to tell that Tengen was a Hashira from his presence alone, it can be assumed Daki can do so as well.

Hair Manipulation: Daki possesses the ability to manipulate her own hair, possibly as an extension of her shapeshifting and flesh manipulation abilities. She briefly displayed this when she shifted her hair color from white to black and even turning it into a weapon as she attempted to attack Inosuke by wrapping her hair around his arms after he successfully decapitated her and took her head from her body to prevent her from reattaching it.

Immense Regeneration: As an Upper Rank demon, Daki possesses advanced regenerative abilities, easily regrowing her severed Obi sashes after they were cut off and later regenerated her leg after it was torn off by Tanjiro. She could also recover from Nezuko's powerful kicks that destroyed her head and pierced her torso within seconds. Daki also displayed the ability to heal from Nezuko's pyrokinetic Blood Demon Art that can slow down the regeneration of demons. Later, she was also shown to be able to easily reattach her severed head despite being repeatedly decapitated by Tengen and Inosuke.

Immense Speed & Reflexes: Daki is extremely fast, shown when she could effortlessly keep up with Tanjiro's Hinokami Kagura techniques to the point she remarked that it was boring. Like all Upper Rank demons, Daki can move so fast that she appears to teleport. After she becomes whole with her dispered Obi sashes, Daki's speed increases drastically, such that it was incomparable from before. Her speed increases even more after Gyutaro awakens, allowing her to keep up with Zenitsu's Thunderclap and Flash technique and successfully react to Tengen's explosives.

Immense Strength: As an Upper Rank demon who harbors an extremely high concentration of Muzan Kibutsuji's blood, Daki possesses incredible physical strength. This is shown when she punched Zenitsu through two rooms effortlessly, made a hole in a roof by hitting it with her bare hands and nearly tore off a young girl's ear. Daki could also lift up an elderly woman without any trouble.

Unlimited Stamina & Endurance: Like all demons, Daki has infinite stamina and endurance. This was mainly displayed when she barely flinched and continued fighting nonchalantly when her Obi sashes, which are extensions of her own body, were cut by the Demon Slayers, with the exception of Tanjiro's Hinokami Kagura techniques. Furthermore, Daki never showed any signs of pain or agony despite getting her head sliced off.

Blood Demon Art
Obi Sash Manipulation: Daki's Blood Demon Art allows her to create flower-patterned Obi sashes from her flesh, as well as manipulate them at will. Her sashes are noted to be soft like silk yet as sharp, if not sharper than most Nichirin Swords. In combat, Daki uses her Obi sashes as powerful and fast tendrils to unleash long-ranged interweaving attacks with no blind spots while also using it to form a shield around her body if need be, making her sashes a perfect blend of offense and defense. Her sashes are so powerful that it could repel and block attacks from Tengen's explosions and slice up buildings in an instant. Furthermore, they are especially difficult to cut because of its softness, and can even loosen the effectiveness of slash attacks by bending and weaving.

Her sashes have a unique property that allows her to "store" objects, usually humans she wants to eat, inside her sashes. She traps them inside the sashes by transforming the objects she wishes to store into 2 dimensional flat versions inside them. This allows her to be stealthy with her movements, as any opening or pathway that is wide enough for a sash to fit in is one that she can take. To free someone from being trapped in the sashes, one must cut it apart while avoiding cutting the people trapped inside, immediately freeing anyone and returning them to their previous form. Daki uses this ability to store humans that she wishes to eat in a space underground and consume them later. Lastly, Daki can turn her own neck into a sash to prevent herself from being decapitated.
 * Sentient Flesh Obi: Daki has also displayed the ability to create sentient Obi sashes as well, which she does to guard and protect her "store house" where she keeps her food. The sentient sashes also have a secondary purpose, which is to capture women in the brothels of the Entertainment District and to gain information about them, as seen when it interrogated Makio. She also created another living sash to to monitor and watch over Hinatsuru as she suspected her of being a spy for the Demon Slayers and then kill her if anything goes amiss. Daki can also telepathically communicate with her sentient sashes, shown when she could give it instructions and watch over Inosuke fighting.

Techniques

 * -|Description =
 * Eight Layered Obi Slash (り) - Daki creates 8 long ranged Obi sashes to cut down her opponents from afar. Daki noted that this interweaving attack has no blind spots, thus making it extremely difficult to evade or counterattack.
 * -|Demonstrations =

Trivia

 * The alias "Daki" contains the kanji for "degenerate, descent, lapse into" (堕) and "princess" (姫), and her real name contains the kanji for "plum" (梅). The alias she used as an oiran translates to "bracken" (蕨) "princess" (姫).
 * It was revealed by her brother that her birth name as a human, "Ume", was the name of the disease that killed their mother. It appears that would be syphilis, as its Japanese name is "Baidoku" (梅毒); "Bai" and "Ume" are alternative On compounds of the same character.
 * Daki's human nickname contains the kanji for "white" (白) and "plum" (梅).
 * Muzan saw her as not a very smart child.
 * It's possible that part of the reason Muzan pretended to like Daki was that she was beautiful and a major source of income. It's noted that one of Muzan's favorite Upper Rank demons was Gyokko, as his pots were works of art that could be sold for a high price, suggesting that despite being a demon Muzan still saw value in having cold hard cash. As an oiran, Daki would also have made a good deal of money.
 * From the references and words of Muzan in Chapter 98 and Tanjiro's sense of smell, it is likely that her brother Gyutaro was the true holder of the position of Upper Rank 6, not her.
 * Daki's ability to transform her neck into an extendable sash appears to be based on the Japanese folklore yōkai called the Rokurokubi.

Quotes

 * (To Omitsu) "They say the secret to living a long life... is to keep silent when you see horrible things. That's how everyone around me managed to survive."
 * (To Tanjiro Kamado) "Blah, Blah, Blah... Don't you ever stop your prattling? I don't remember such things. The past is the past. I'm a demon now, that's all that matters. We don't get old. We don't need money to eat. We don't get sick... and we never die. We never lose anything! We never fade. We're eternally young and beautiful. And we're strong! Demons can do whatever we want!"
 * (To Tanjiro Kamado) "You humans are so miserable. No matter how hard you try, this is all you got. How unfortunate.."
 * (To Gyutaro) "No! No! No! You can't leave me! You mustn't leave me! We have to stay together! No matter how many times I might be reborn, I'll always be your little sister!"

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