Conversation. Fun fact: The reason why Enmu was able to say Muzan's name out loud without dying is because they're married!
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.
Muzan then decided Enmu was worth keeping alive so he can attack the demon slayers and gave him more of his blood making him stronger, promising him more blood if he can kill Tanjiro or the Hashira. Enmu's body could hardly process so much new strength and he almost died.
Don't go! DON'T LEAVE ME HERE! Muzan speaks his final words as he loses control over Tanjiro.
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 warrior Muzan feared was a swordsman named Yoriichi Tsugikuni. Yoriichi was the only slayer before Tanjiro who came close to killing Muzan, and the flashback of their fight occurred in Chapter 187.
Akaza. Because of his desire to become stronger and Doma's strength allowing him to surpass himself to become Upper Two, Akaza harboured an intense hatred of Doma.
Curse of Kibutsuji
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. Susamaru accidentally shot Muzan's name aloud, attempting to defend his honor with her mind clouded.
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.
ENMU was accredited by the North Central Association of Colleges and Secondary Schools as a four-year liberal arts college in 1947. Graduate work leading to the master's degree was added in 1949, and the institution was officially designated Eastern New Mexico University in 1955.
Eastern New Mexico University (ENMU or Eastern) is a public university with a main campus in Portales, New Mexico, and two associate degree-granting branches, one at Ruidoso and one at Roswell.
The only reason why Muzan hates Doma is because of his insincerity and lack of emotions. This might sound odd, expecting emotions from a demon, but even a demon has to retain such tendencies to keep things in order.
During the MT arc Enmu yells out muzans name and some how doesn't die. I researched a little about it and figured out that they were married.
As well as sadism, Enmu was shown to exhibit masochistic behaviors, a multitude of times he had expressed positive reactions to pain inflicted on him.
During his battle with the demon slayers on the Infinity Train, the demon Enmu wasted no time displaying the strength of his Demon Art, Dream Manipulation. With this Demon Art, he can manipulate his opponents' dreams after putting them to sleep using his primary Demon Art, Sleep Inducement.
Muzan himself never thought highly of Daki and didn't reciprocate her devotion whatsoever, only ever talking to her to sweetly manipulate her into defeating Demon Slayers on his behalf.
Abilities. Demon Body: Unique from other demons, he possesses seven hearts, and five brains. These are responsible for his powerful vitality, should any of them be harmed, he will be severely weakened.
It's true that in later episodes, Muzan also appears as a woman wearing a kimono when he's holding court over other Demons, most of whom are also wearing traditional Japanese clothing. This might have something to do with Demons (or “Oni”) themselves being part of traditional Japanese culture.
Muzan is an extremely self-absorbed and narcissistic demon. He is obsessed with becoming the world's most superior being, and, since he's lived on for centuries without any real threat to his life, he has let that go to his head. Aside from the sun, he has no real weakness, and he obliterates whoever gets in his way.
Since Muzan is able to discern the locations of Demons whom he has given blood to, he is seemingly capable of locating Nezuko at the Ubuyashiki Estate. However, he is unaware that Tamayo had removed his curse from Nezuko, making him incapable of detecting her whereabouts.
With her immense fondness for humanity, Nezuko broke out of Muzan's control, becoming free to do anything at her will. 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.
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.
After Akaza's death, Doma says that he felt as if the Upper Rank had turned into a different creature before he died, and that his demise is inevitable because he never ate any women. Doma begins to cry over his 'best friend's' death, but Kanao just tells him to stop with the lies.
Despite being a blood-thristy demon who has murdered several people, he has a set of principles he adheres to. One thing that Demon Slayer fans have noticed is that Akaza refuses to eat or kill women. Additionally, the Demon King, Muzan, gave Akaza special permission to do so.
Doma is always smiling and acts very friendly, but this cheerful, caring nature is simply a facade. He states that he cares for his fellow Upper Moons and even cries when he learns that Akaza died, though, in fact, he doesn't feel anything for them.