Nezuko, Tamayo, Yushiro, and later Chachamaru are the only four demons not under the control of Muzan.
As the Demon King, Muzan can control all those who have assimilated his blood to become demons, with Nezuko Kamado, Tamayo, Yushiro, and Chachamaru being the only exceptions.
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.
Who is stronger than Muzan, the original Demon King? The only character who was stronger than Muzan was Yoriichi. He almost beat Muzan before splitting his body into 1800 parts in an attempt to escape. He escaped successfully and managed to fuse back into a single body after a while.
9 Muzan Controls Almost All Demons
All demons fear him because of his sadistic and ruthless nature.
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.
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.
Muzan, the King of Demons, is the strongest and also the primal demon in the world of Demon Slayer. Consuming his blood is enough to turn you into a powerful demon. He can control all the demons in existence, with only people with strong willpower like Nezuko being an exception.
From the beginning of the series, Kibutsuji Muzan was established as the most fearsome demon in existence. He is responsible for the creation of all other demons in the series, of which most are still extremely fearful of him, as he has been shown to slaughter subordinates that displease him.
The only Demon he despises the most is the Upper Rank Two: Doma. It is quite a shocker that the second most potent Demon in the Demon Slayer is not Muzan's favorite.
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.
Tanjiro's ancestor was a good friend of Yoriichi and arguably was one of his only true friends. Therefore Yoriichi gave the earrings as a gift, and since then they have been passed down the generations until they reached Tanjiro.
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.
Nezuko, Tamayo, Yushiro, and later Chachamaru are the only four demons not under the control of Muzan.
As Nezuko can't speak Muzan's name out loud, she can't be affected by the curse.
It is theorized that Nezuko was able to conquer the Sun because she comes from a lineage of Sun Breathing users and because she kept a big part of her own humanity i.e. because she never ate human flesh.
As the main threat occupying the position of Upper Moon Six, Gyutaro's Blood Demon Art is tremendously powerful and extremely dangerous. With it, he can perform various attacks using blood from different parts of his body, and project them from his sickles as well.
1. Gyomei Himejima. Gyomei Himejima, the Stone Hashira, is the strongest Hashira in the Demon Slayer corps in terms of strength and swordsmanship. He is the only person who uses spiked flails and an axe instead of standard swords to kill demons.
Sanemi's blood is known to be enticing yet intoxicating to Demons, which he used to bait and stab Nezuko. Sanemi is clearly the least popular Hashira among Demon Slayer fans.
Don't go! DON'T LEAVE ME HERE! Muzan speaks his final words as he loses control over Tanjiro.
Conversation. Fun fact: The reason why Enmu was able to say Muzan's name out loud without dying is because they're married!
Muzan Kibutsuji (鬼舞辻無惨) is the man responsible for transforming Nezuko Kamado into a Demon and the main antagonist of Demon Slayer (Kimetsu no Yaiba). Tanjiro could identify him instantly, based on his demon smell. He was the first human to become a Demon over a thousand years ago.