Daki

Name (human): Ume

Demon name: Daki

Affiliation: Twelve Kizuki, Upper Rank Six

Blood Demon Art: Obi (sash) manipulation

First appearance (manga): Volume 9, Chapter 73 “Pursuit”

Voice actor (anime): Miyuki Sawashiro

Second official popularity poll: 40th place (180 votes)

Daki is the only female Upper Rank demon serving under Muzan Kibutsuji and is also known as the “Obi Demon.”

She holds the Upper Rank Six position together with her brother Gyutaro; the numeral “Six” is carved into her right eye and “Upper Rank” into her left eye.

She hides among humans as a top-tier oiran (courtesan), using the name “Warabihime” at the Kyogoku House in the Yoshiwara Entertainment District.

For nearly a century she has rotated through various red-light districts, repeatedly reinventing herself under different “princess” stage names while hunting humans.

Within the world of Demon Slayer: Kimetsu no Yaiba Entertainment District Arc, Daki is introduced as the central demon threat of the Yoshiwara case.

Her existence is treated as an urban legend in the pleasure quarters, spoken of as a calamity that must never be mentioned.

As a demon, Daki has a highly revealing outfit, reminiscent of lingerie, exposing her midriff and much of her body.

She wears long, layered obi sashes wrapped around her torso and waist, along with tall three-toothed wooden geta sandals that add to her striking silhouette.

Her demon form features white hair with green-tinted tips and pale skin with crack-like markings spreading across her body.

Floral patterns appear on her forehead and cheek, emphasizing an eerie, doll-like beauty.

In her oiran disguise as Warabihime, she presents with black hair and a refined, glamorous courtesan appearance.

This human guise is actually an incomplete state in which part of her body (her “obi clone”) is separated, with her full power and true hair color returning when she reabsorbs it.

Paintings and flashbacks show that before Warabihime she used other “princess” stage names such as Oiran Oiran Yaezuhime (in the anime: a previous persona implied through ukiyo-e-style art).

Regardless of the alias, she is always remembered as an overwhelmingly beautiful yet vicious top-ranking courtesan.

As a human child named Ume, she had pure white hair and skin and striking blue eyes matching Gyutaro’s human eye color.

Her beauty was so exceptional that even as a girl she could make adults falter just by walking past.

Daki’s personality is extremely cruel, arrogant, and sadistic.

She delights in bullying those weaker than herself and casually drives other courtesans to suicide through violence and psychological abuse.

At the Kyogoku House, injuries, attempted escapes, and suicides are commonplace wherever she resides.

Her beauty and earning power are so overwhelming that no one in the house—other courtesans, young attendants, or even the owner—can oppose her, despite suspecting something is deeply wrong.

She openly despises “ugly” people and the elderly, insisting that she only eats beautiful humans.

She mocks unattractive or “disgusting”-looking people and tells them they would be better off dead, seeing no value in their lives.

Daki is obsessively fixated on beauty.

She believes that “a beautiful and strong demon can do whatever they want,” basking in her own appearance and power.

However, her emotional maturity is stunted and childlike.

When events stop going her way or enemies overwhelm her, she suddenly breaks down into tears, flails, and screams like a tantrum-throwing child.

Her speech becomes babyish and her façade of regal cruelty crumbles in front of Gyutaro.

In those moments she reverts to the core of her character: a selfish, clingy, and deeply dependent little sister who cries out, “Big brother, do something!”

Despite her monstrous cruelty, Daki shows a single unwavering exception to her hatred of ugliness: she loves Gyutaro unconditionally.

She never rejects him for his appearance, and her attachment to him ultimately defines both her life and her death.

With Muzan Kibutsuji, Daki adopts a submissive, fawning demeanor.

Though she herself is cruel and domineering, she becomes deferential in front of Muzan, beaming when praised yet being considered by him, internally, as a hindrance or “stupid child.”

Daki has lived in the red-light districts for at least a century, primarily in Yoshiwara.

Whenever her unaging beauty arouses suspicion, she “moves on,” allowing decades to pass until witnesses die out, then returns under a new name and persona.

She always chooses courtesan names containing “hime” (“princess”) and maintains a recognizable habit: when displeased, she tilts her head and glares upward from below, a mannerism passed down like a ghost story.

Older generations in the district whisper of a “princess” courtesan whose beauty never fades and whose temper is catastrophic.

Within Kyogoku House, she is the marquee star, the No. 1 oiran that everyone relies on financially yet secretly fears.

She has caused numerous attendants and junior courtesans to run away or suffer mental breakdowns, and she has “favorite” victims whom she torments.

The house’s senior proprietor Oiran O-mitsu eventually concludes that Daki is not human at all.

Daki responds by killing her, showing how ruthlessly she erases anyone who gets too close to her secret.

Daki’s hidden obi corridors stretch across the district, turning Yoshiwara itself into her hunting ground.

She uses the brothel network to gather victims, monitor suspicious individuals, and quietly remove anyone who notices too much.

Blood Demon Art: Obi

Daki’s Blood Demon Art allows her to generate and manipulate obi sashes from her body.

These sashes are flexible yet razor sharp, able to slice through humans, buildings, and weapons with ease.

She can control multiple obi at once like serpents, attacking from all directions to overwhelm her opponents.

The sashes can move with extreme speed and precision, making her a dangerous long-range and crowd-control fighter.

The obi can also be hollowed and used as a storage space.

Daki traps humans inside them, keeping her “food” preserved until she is ready to eat.

Victims sealed within her obi can be freed by cutting the sash with a Nichirin Sword.

This mechanic lets Demon Slayers rescue people if they can reach and sever the obi in time.

Daki can separate parts of her body into independent obi clones.

These clones exhibit a mouth and eyes and can act autonomously, scouting, patrolling, and capturing humans throughout the district.

She uses this ability to create hidden passages between brothels, a subterranean “warehouse” for prisoners, and a surveillance network over suspicious courtesans and customers.

This makes her extremely difficult to expose, even for skilled infiltrators like Tengen Uzui and his kunoichi wives Hinatsuru, Suma, and Makio.

Body Transformation and Neck Defense

One of Daki’s key survival techniques is the ability to transform her body—especially her neck—into obi.

By turning her neck into a flexible sash, she attempts to negate or evade decapitation from a Nichirin Sword.

This technique allows her to evade otherwise fatal strikes and reconstitute herself from the obi.

However, it is not absolute; sufficiently fast, powerful, or cleverly angled attacks can still sever her neck.

Attacks that outpace her transformation or slice her neck from multiple directions can bypass the obi’s flexibility.

A sawing motion or simultaneous strikes from different angles can overcome her defense.

Daki can also ride on her own floating sashes, wrapping herself in obi to hover in midair.

This grants her mobility and positional advantage in tight environments like the entertainment district’s roofs and narrow streets.

Eight-Layered Obi Slash

Her named technique “Eight-Layered Obi Slash” unleashes numerous overlapping sashes that intersect to form a deadly net of blades.

These slash lines fill the space around the enemy, cutting off escape routes while delivering high-speed strikes.

At this point, she has reabsorbed the scattered obi reserves hidden around the district.

By consolidating all that mass back into her body, the hardness and reaction speed of her sashes increase dramatically.

The technique turns the battlefield into a three-dimensional lattice of death.

Escaping it requires exceptional agility, timing, or the ability to break through multiple sash layers at once.

Actual Combat Strength

Compared with earlier demons that Tanjiro Kamado, Zenitsu Agatsuma, and Inosuke Hashibira faced, Daki is on a completely different level.

Her attacks and regeneration push Tanjiro to exceed his limits by using the Hinokami Kagura (Sun Breathing-derived technique), nearly killing him from overexertion.

However, when the Sound Hashira Tengen Uzui confronts her at full strength, he decapitates her almost effortlessly.

Tengen immediately judges that she is too weak to be the true Upper Rank Six.

Uzui concludes that the real Upper Rank demon is another entity and calls Daki a fake, dismissing her as “too weak” and telling her he has no more use for her.

Daki, furious and humiliated, breaks down and wails, insisting “I am Upper Rank Six!” while screaming for her “big brother.”

It is at this moment that Gyutaro emerges from her back, revealing that Daki and Gyutaro together form the genuine Upper Rank Six.

From then on, Daki becomes more of a support fighter under her brother’s guidance, while Gyutaro provides strategy and lethal power.

Dual Existence with Gyutaro

The true bearer of the Upper Rank Six title is Gyutaro, with Daki effectively serving as his attached counterpart.

They are two demons sharing intertwined bodies and lives; defeating only one is not enough.

For them to die, both siblings’ necks must be severed nearly simultaneously.

If only one is decapitated, the surviving sibling can reattach the other’s head, allowing them to regenerate.

This dual condition is what enabled them to kill a total of twenty-two Hashira over the past century.

Most Demon Slayer Corps Hashira would have faced them alone, making it nearly impossible to coordinate the simultaneous decapitation required.

In battle, Gyutaro can embed his eye into Daki’s forehead, letting him see through her and control her movements.

In this linked state, Daki’s combat performance improves significantly because she is guided by Gyutaro’s superior battle instincts.

During the Yoshiwara battle, Tengen Uzui, assisted by Tanjiro, Zenitsu, and Inosuke, manages to achieve the near-simultaneous decapitation needed to defeat the siblings.

The combined effort of a Hashira and three skilled Demon Slayers is what finally overcomes this otherwise nightmarish duo.

Despite her mastery of concealment within the entertainment district, Daki shares an important sensory blind spot common to demons.

Demons generally struggle to distinguish ordinary humans from Demon Slayer swordsmen unless the enemy is extremely powerful, like a Hashira.

Muzan Kibutsuji himself points out that while Demon Slayers can often sense a demon’s presence, demons are poor at discerning which humans are threats.

This means that even formidable demons may fail to recognize skilled infiltrators or undercover Demon Slayer agents.

Daki fails to realize that Tengen Uzui’s three wives, posing as courtesans, are gathering extensive intelligence on her.

By the time she becomes suspicious and captures them, much of the crucial information has already been passed on to Uzui.

Similarly, Daki kills O-mitsu, whose husband later betrays her location out of grief and fear, inadvertently aiding the Demon Slayer Corps.

Her inability to properly gauge danger from seemingly ordinary humans ends up contributing to her downfall.

In this sense, people like Aoi Kanzaki—who operate behind the scenes and do not exhibit obvious “warrior auras”—would actually be the safest for undercover work.

By contrast, someone like Zenitsu, who is on the verge of becoming a “handpicked expert,” stands out more and attracts suspicion from demons.

At her core, Daki is a spoiled, clingy, “big-brother-loving” girl whose personality never matured beyond childhood.

Her usual sadism and arrogance are more like a mask built atop a frightened, dependent inner self.

She cries out for Gyutaro whenever she feels cornered, trusting him to fix anything she cannot handle.

When Gyutaro emerges, she immediately becomes more childish, complaining, pouting, and insisting that she really is worthy of being an Upper Rank.

Gyutaro knows his sister well and describes her as honest and easily influenced.

He believes that if she had been born into a good family, she could have become a refined, happy young woman.

He also regrets having taught her the cruel philosophy of “take before you are taken from,” thinking he may have steered her down the wrong path.

He wonders if, by being with him, she was dragged toward a darker life than she deserved.

Daki, for her part, never blames Gyutaro for any of it.

Even when he tries to push her away in the afterlife, she clings stubbornly to him, insisting she will always be his little sister no matter how many times they are reborn.

Their final scene in the afterlife mirrors Tanjiro and Nezuko Kamado’s sibling bond in a dark, tragic way.

The visual of Daki, back in her human form as Ume, riding on Gyutaro’s back as they walk into the darkness evokes a twisted reflection of a loving brother carrying his cherished sister.

Daki’s human name was Ume, taken from the disease that afflicted her mother.

She was born in the lowest strata of a red-light district, to a sickly mother and an unknown father.

Her mother was both abusive and fearful of Ume’s unusual appearance—white hair and pale eyes—which she found unsettling.

At one point, she even attempted to kill Ume as a baby, but Gyutaro intervened and saved his sister.

Gyutaro himself was a malnourished, “ugly” boy who worked as a debt collector.

He adored his little sister, who followed him everywhere and cried whenever they were separated.

Their mother continued to treat them terribly, beating Ume and even cutting her hair with a razor in a rage.

This finally pushed Gyutaro over the edge, and he attacked her, flipping the family power dynamic and leaving their mother terrified of him until her death.

Despite their dire poverty, Ume’s astonishing beauty became their salvation.

As she grew, adults were stunned by her looks; simply walking down the street, she received gifts and attention.

People began referring to her as “Little White Ume.”

Once she understood how to leverage her beauty, she and Gyutaro stopped starving, as she could attract food, money, and favorable treatment.

Eventually, she was taken in as a courtesan-in-training and later as a full courtesan in the district, even though she was still very young.

The era’s harshness meant that girls in the red-light world were often forced into adult roles at disturbingly early ages.

At around thirteen years old, Ume blinded a samurai patron by stabbing his left eye with a hairpin after he insulted Gyutaro.

This incident triggered a brutal retaliation from the br