Daki

Daki, known as Warabihime in her oiran guise , was a member of the Twelve Demon Moons, holding the position of Upper Moon Six.

Appearance
When Daki was first introduced, she had black hair tied up in a geisha style. She was known for her beauty in the red district. When she transformed into a demon, she had a flower-like tattoo on her face. After she reclaimed her demon cloth, her hair turned white.

Personality
Daki is a very prideful and sadistic woman, taking enjoyment in messing with her victims before finishing them off. She seems to have a somewhat caring relationship with her brother, though she has been seen insulting and ridiculing him when they both fail. As a courtesan, she seems to have a seductive side to her. Despite being hundreds of years old, she has displayed childish tendencies such as throwing tantrums when things begin going against her and lashing out against anyone in order to vent her frustrations. She also cries like a child when she does not get her way. These 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 her brother 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 due to her being raised by him under the words "take before you're taken" she ended up as she is now.

Human Life
"Daki" was born many years ago in the Red Light Districts Lowest Cast of "Rashomongasi" were only the prostitutes, geishas and oirans, who could no longer work in the Brothels due to sickness were sent and left to die. Her birth mother was a prostitute who originated from there, having given birth to her elder brother a few years before her. Her biological father was never mentioned, likely due him being one of her mother costumers. Most likely due to the severely poor living conditions and harsh life in the district, her mother was noted by her elder brother to be severely mentally unstable, having attempted to kill herself numerous times and then attempted to kill her son numerous times as well. She also physically abused him due to not having the finances to keep him fed, forcing him to fend for himself. When Daki was born, likely due to their mother's mental instability, she was primarily raised by her elder brother until her early teen years, in the middle of which their mother passed away due to the disease called "Ume", which she was named after.

Gyutaro noted that, even as a young child, Ume was born with an incredibly beautiful face that even grown men and women would falter from looking at. This gave him hope that the both of them could rise from their poor and hazardous environment and be able to lead a better life by being scouted out and eventually allowed to work in one of the most prestigious Brothels of the district. Just as he had hoped, Ume, in her early teen years, was finally able to work in one of the Red Light Districts Brothels. She began receiving proper education, skills and food in her training to become a oiran and began making a fortune by attracting many suitors and customers to the brothel. 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 the end when Ume, in self defense, poked out the eye of a samurai, a customer of hers, 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 her near-death state. They were then discovered by the same samurai she blinded, accompanied by the Madame 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, however, as he came to the realization that no one would help them.

As Gyutaro collapsed from exhaustion and fatigue due to his severe wounds, Doma, the then Upper Moon Six, happened upon the siblings as he wandered the district to devour the flesh of beautiful Geisha and offered to help them by turning them into Demons due to him being a "nice guy". He then challenged them to become strong enough to be chosen by that "Man" and join the Twelve Demon Moons alongside himself.

As a Demon
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 attentions of "that Man" who acknowledged their strength and power and officially allowed them to join the Twelve Demon Moons and both were given the rank of Upper Moon Six.

At some point, Daki fought and killed seven Pillars.

Two days before Tanjiro Kamado and company infiltrated the Red Light District, Daki was confronted by Omitsu, the manager of the Kyogoku House, over her mistreatment of the staff. When the hostess revealed her knowledge of Daki's past and extended lifespan, the Upper Moon 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.

Red Light District Arc
Walking with several assistants, Daki passed under Tengen Uzui's watchful gaze undetected in her oiran guise. Later, via her Demonic 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 Hunter 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 Moon then pondered Zenitsu's identity, noting he might be a Demon Hunter. 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 Pillar would arrive. Dismissing the youth for his weakness, Daki soon grew enraged when he demanded she released Koinatsu and attacked the Demon Hunter with her sashes. Noting that he had survived, she complimented Tanjiro's eyes, wishing to eat them. She briefly clashed with the young Demon Hunter 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, questioning Tanjiro about his amount of 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 Dance of the Fire God technique. Noting the change in his sword style, she dodged his next attack, countering with an attack of her own. Missing due to another Dance of the Fire God technique, the Upper Moon turned to face her opponent just as his blade struck at her neck.

Demon Abilities
Daki is noted to be a powerful demon, having been personally acknowledged by Muzan himself, on being "special" this is further given credence as she was able to overwhelm and hold the advantage over both Tanjiro, Nezuko, Zenitsu and Inosuke all of whom were talented combatants, backing up her initial claims as one of the Twelve Moon Demons. Hovewer it is only thanks to her brother's ability that she is considered an Upper Moon. Blood Demon Technique:
 * Regeneration - Daki is shown to have powerful regenerative abilities, as seen when she was able to easily heal herself after being burned alive by Nezuko's Blood Demon Art, and was able to regrow her severed sash tentacles seconds after they were severed.
 * Flesh Detachments - Daki has also displayed the ability to create sentient flesh detachments from her own body, as seen when she was able to create a living Flesh Sashes to Guard and protect her "store house" and watch over her "Meat", and again when she created another living sash to monitor and watch over Hinatsuru as she suspected her of being a spy.
 * Shapeshifting - Daki has also displayed the ability to morph and shift her neck to have the properties of a cloth sash, as seen when she transformed her neck into a long sash of cloth to avoid being decapitated by Tanjiro.
 * Cell Merging - Daki has also displayed the ability to merge her body with that of her Older Brother Gyutaro, which in turn enhanced her own abilities.
 * Psychic Connection - Daki has the ability to share her senses and mind with her elder brother and allowing him to control her body by implanting one of his eyes into her forehead, sending him logistical information through this link in order to coordinate their attacks. At the same time, this ability also enhances all of Daki's own existing abilities and enhances her own sense of sight, due to being implanted with one of her brothers own eyes. This is seen when she was able to easily keep up with Zenitsu while he was using his Breath of Lighting Techniques.
 * Multilayered Sash Slash (り) - Daki creates multiple simultaneous sash attacks in order to cut her opponent.

Trivia

 * Her alias, Daki, means inactivity, dullness, listlessness.
 * Her real name, Ume (梅), means plum and it also means Japanese Plum Tree.
 * Her oiran name, Warabihime, means Bracken Princess.
 * It was revealed by her brother that her birth name as a human was "Ume", 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 readings of the same character.
 * From the references and words of Muzan in Chapter 98, it is likely that her brother Gyutaro was the true holder of the Position of Upper Moon Six, not her.
 * This is further reinforced by the fact that Tengen Uzui, the Sound Pillar, was able to easily cut her head off without her noticing and confirmed, from his own experience battling Demons, that she was nowhere near qualified to be one of the Upper Moons without her brother's support.

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Даки