Gyutaro even went as far as giving Daki one of his eyes to power her up, but also so he could literally keep an eye on her while they fought separately. Gyutaro claimed to Tengen that he and Daki are two people in one, and it became clear he didn't only mean their power and status as Upper Six, but their bond.
Daki received a third eye that Gyutaro had implanted on her forehead. Her reflexes were quicker, her movements were sharper and her strength improved quite drastically. If we take a closer look, it was Gyutaro's left eye that was implanted on her forehead.
Core Detachment: Gyutaro possessed the ability to completely detach his "core" from his own body, with it seemingly taking the form of his right eye that he then implants into his sister Daki's forehead, that then enhances and strengthens all of his sister's abilities and powers.
The Samurai not only insulted Gyutaro in front of Daki but also made fun of his malnourished body and disease. As Daki was unable to tolerate the insult of her brother, she took off her Kanzashi and stabbed the left eye of the Samurai.
Despite being hundreds of years old and losing all of his human memories, Gyutaro has a strong attachment to his younger sister, Daki. Gyutaro promising Daki that they will always be together.
In the eighth episode of the "Entertainment District" arc, Upper Six Gyutaro couldn't stop gushing over his man-crush on Tengen.
Trivia. Anne was originally planned to be Muzan`s older sister, who died by the hand of a Demon Slayer but that idea was scrapped, as the author knew practically nothing about Muzan`s early life. Instead, Anne became his wife, by which he had two children.
Daki is highly sexualized despite being biologically thirteen years old. While it could be argued that her sexualization is part of her story, as she is a courtesan, it still can leave more mature fans feeling a little weird.
Though now he's on his way. Daki too has reached new heights of power. She absorbs the remains of the belt demon, her hair turns white and green, and she gets uh, more veiny. But she is shocked when Tanjiro's Sun Breathing not only cuts through her belts, but actually burns her.
Akaza was also one of Muzan's favorite demons out of all his subordinates. The reason behind this is Akaza's extreme loyalty to his master. The Upper Rank Three demon was always sent away on special missions, something the Upper Rank 1 and 2 were often denied of.
A habit he seems to have is the penchant to inflict harm to himself when he is angry, frustrated or jealous as seen when he scratched himself hard enough to tear deep wounds into his own flesh when he grew jealous of Tengen.
Gyutaro's ability to exist inside Daki's body apparently isn't just so they never have to be apart, but it's also the safest state of being for her. Keeping his sister safe is Gyutaro's only goal in life, so he seemed content to just stay inside her body and let her do as she pleased until she needed him.
In the manga, it was stated that Daki gave Gyutaro an extra pair of eyes on the battlefield. She also made it much harder for Gyutaro to be killed as both their heads needed to be cut of simultaneously. Without Daki, Tengen + Tanjiro, Zenitsu and Inosuke could have focused Gyutaro.
Daki quickly identified the memory as Muzan's, in which a man with the same auburn hair, Hanafuda Earrings and forehead scar as Tanjiro delivered an equally foreboding speech to him.
Muzan is shown to have a positive master-servant relationship with Daki, as the young Demoness seemingly worships and admires the Demon Progenitor immensely, fervently hanging on each and every one one of his words and doing her absolute best to accomplish the tasks he gives her.
Now since we know Daki's human age is 13 and both she and Gyutaro have been demons for only 100 years, we now know that Daki is officially 113.
Daki was obsessed with beauty and if she saw a beautiful human, she immediately grew the need to eat them. With the help of her Obi, Daki would trap her prey and store them inside the Obi. This allowed Daki to consume the trapped people at her leisure.
First of all daki is already shown as a prostitute in the entertainment district arc. She wears these clothes because she has to look seducing.
The only two people she really cares for are Muzan Kibutsuji and her older brother. She shows deep respect for Muzan Kibutsuji immediately falling into a bow when he appears. Although she cares and loves her brother she is seen insulting and blaming him at times when things aren't going well.
3 Muzan Mainly Liked Daki Because Of Her Potential To Earn Money. Given how easily Muzan would destroy any demon who didn't have any use for him, people have to wonder how he managed to be so tolerant for Daki's sake even though he already held the notion that she wasn't the brightest of the lot.
6) Daki. Given that she is the only demon on this list, it is quite obvious that the Demon Slayer fan base considers her to be a waifu merely for her appearances.
Yet an official Demon Slayer "fanbook," written by the manga's creator, Koyoharu Gotouge, revealed Muzan doesn't really like Upper Rank Two demon, Doma. As Lower Ranks Six, Four, Three and Two can attest, Muzan is not averse to eliminating demons he doesn't care for, even if they're Kizuki.
Enmu was one of the demons serving under Muzan, the first of his kind as well as the Demon King. They first met when Enmu was a human and Muzan consumed his guts.
Conversation. Fun fact: The reason why Enmu was able to say Muzan's name out loud without dying is because they're married!