Curse of Kibutsuji This curse besotted any who partake of Muzan's blood must be careful. The curse prevents Muzan's name from being spoken aloud, and any who do will meet a horrible demise. One demon, Susamaru, faced this reality when battling Tamayo.
Fun fact: The reason why Enmu was able to say Muzan's name out loud without dying is because they're married!
Among his myriad of dread-inspiring techniques in Demon Slayer, Kibutsuji Muzan has the ability to place a curse on any demon imbued with his blood. Should any demon he's created say "Kibutsuji" aloud, the curse is activated -- instantly killing them.
It is unclear if the curse branded to her by Muzan got lifted or not, but she can't speak a word after turning into a demon, and always has a muzzle in her mouth. As Nezuko can't speak Muzan's name out loud, she can't be affected by the curse.
As Susamaru desperately attempts to silence her, Yushiro notes that Tamayo is using her Blood Bewitchment: Magical Aroma of Daylight ability on the Demon to get her to say Muzan's name, which she does, and Muzan's curse then suddenly begins to break out from inside her.
Enmu's passionate praise about Muzan led many fans to think that Enmu is extremely devoted to the demons and worships him with something close to infatuation. He likely wanted to be an Upper Moon to be closer to Muzan, or to not be seen as weak and worthless in Muzan's eyes.
The two known demons who broke free of Muzan's curse are Tamayo and Nezuko. Tamayo was able to break free of the condemnation when Yoriichi fought Muzan, nearly killing him in the process. During this weakened state, Yoriichi let Tamayo go, free her from Muzan, and free her from the curse.
In a nutshell, Muzan, being the progenitor of demons, is not scared of Doma. However, he is irritated by his inability to decipher Doma's thoughts and feelings, which is the ultimate control he has over all of his creations. Upper-Rank Two: Doma is a nihilistic maniac and a misanthropic cold-blooded demon.
Does Muzan have a favorite demon? Despite the fact that Muzan. is always shown to have disdain for his creations, Muzan does in fact have a favorite. On that list is Naki, made due to a convenient blood demon.
Muzan was born in Japan's Heian era, to a constant struggle to survive on account of his frailty. His heart stopped multiple times in his mother's womb, and when he first entered the world, he was deemed stillborn, having no pulse and not breathing.
In some cases, depending on the climate, the Blue Spider Lily doesn't even bloom at all. This explains why Muzan Kibutsuji never found it despite searching all over Japan for centuries: he was hindered by his inability to go out during the day.
The first demon that is said to have existed was Muzan Kibutsuji. The one who turned him into a demon was a generous doctor from the Heian Period, who wanted to save Muzan from death since, at the time, he was diagnosed with a disease which would kill him before he turned twenty.
It is revealed that Muzan's true fear of dying and immense desire to live and survive was due to him being born "dead," where his heart would constantly stop in his mother's womb and was assumed stillborn until he fought to breathe before his cremation.
After he neutralizes Tamayo's poison and emerges from his flesh cocoon, Muzan's hair grows in length and turns white due to Shinobu's poison accelerating his age. He also grows numerous mouths all over his limbs, each one lined with a set of incredibly sharp fangs.
Don't go! DON'T LEAVE ME HERE! Muzan speaks his final words as he loses control over Tanjiro.
Furthermore, Doma is regarded as the coldest and most obnoxious demon. He frequently behaves carelessly around Muzan, which he even hates. All these aspects, as well as Doma's lack of sincerity, irresponsibility, and complete maniac-like nature, fuel Akaza's hatred for him.
However, in truth, as revealed after her death, Muzan sees Daki as a tool to keep her brother, Gyutaro, in line, deeming her to be the main reason why the "true" Upper Rank 6 was killed and in truth does not think highly of her and deeming her as someone not very intelligent.
Her background as a courtesan coupled with her beauty meant that she would serve as a great and reliable source of income for Muzan, which is why the Demon King decided to be tolerant of her apparent stupidity.
Inosuke's Father Was Abusive
Doma tells Inosuke that his mother was singing a lot, particularly a lullaby called “pinky promise.” It seemed as if mother and child were safe and happy at last; however, when Kotoha soon found out that Doma was a Demon and eating some of the worshippers, their happiness crashed.
Who does Muzan regret killing? He shows his most human side to fans, wherein he admits to regretting murdering his doctor. He comments that had he been patient, the doctor would have cured him, and he would never have turned into a demon.
During the Demon Slayer season 3 finale's depiction of Tamayo analyzing Nezuko's blood, it's shown that Nezuko's blood has blue elements to it, and since the Blue Spider Lily has the power to cure Muzan of his weakness to sunlight, the anime could be revealing that Nezuko's immunity comes from the Blue Spider Lily at ...
Over his long lifetime, Muzan had a number of families. This includes the one he was born into before becoming a demon. Additionally, he took 5 wives, making each one's life miserable. Repeated abuse and torture drove them to take their lives.
Muzan can only not control two demons that are Nezuko and Tamayo. Nezuko is able to cling to all the humanity she has left and she can also block his influence on her. Her strong desire of protecting her brother and the devotion towards her family makes her hard to control for Muzan.