Despite panicking and being apologetic towards Muzan about how the rest of the Upper-Ranks would act, he gives an unconcerned disposition like he's not afraid. The only reason why Muzan hates Doma is because of his insincerity and lack of emotions.
Doma's lack of fear and inability to show true emotion infuriated him, who desired to be feared and respected, and Muzan never liked Doma as a result.
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.
Doma in turn has not displayed any form of fear, anxiety or anger at the Demon Lord despite his attitude towards him and the other Upper Ranks or any of the potential punishment he could inflict upon him, in fact Doma himself has not displayed the usual attitude of fear and respect most Demons show Muzan and is instead ...
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.
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.
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.
With his blood, Muzan can turn others into demons and seems like an unstoppable foe. However, the demon king seems to fear one thing: Tanjirou's hanafuda earrings. A look into Muzan's past reveals that only one man ever came close to killing him.
Akaza is an upper-rank-three Demon and one of the most faithful minions of the Demon king Muzan Kibutsuji. The Blood Demon Art that Akaza uses is known as Destructive Death.
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. Even when he was human, Doma didn't feel any type of human emotion.
Douma said that he had never felt emotions before, but his heart felt like it was beating now. He started doubting his belief that heaven and hell didn't exist and started blushing at Shinobu, quickly developing a crush on her. He told her that she was cute and asked if she wanted to go to hell with him.
However, after his death, he accepted that he is wrong and that Heaven and Hell actually do exist. Doma also displayed what arguably is his first true emotion, love, when he proclaimed his love for Shinobu after finding her cute.
In his final moments, Doma says that he is not afraid of death or even frustrated that he lost, and recalls his past as a human and his inability to feel any emotion. Doma falls in love with Shinobu.
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.
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.
Despite having a good relationship with his servant Daki (who he knew would never betray him), Muzan still didn't trust her. He constantly kept her emotionally bound to him by showering her with compliments, like telling her she's special to him.
Yoriichi Tsugikuni was the first Demon Slayer and also the one who invented Breathing Techniques in the first place. Yoriichi was born with the Demon Slayer mark and prowess in swordsmanship. His powers were beyond comparison as he defeated Muzan once and had him on the verge of death until he managed to escape.
Kokushibo is one of the strongest demons in the anime, only second to Demon King Muzan. Before turning into a demon, he was a part of the Demon Slayer Corps alongside his brother Yoriichi Tsugikini.
1 Yoriichi Tsugikuni (Demon Slayer)
Yoriichi's mastery of the Sun Breathing technique, combined with his incredible speed and agility, made him a formidable opponent for Muzan.
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.
Sensing their despair, Doma offered a chance to him and turned both Gyutaro and Daki into demons.
Moreover, Tanjiro's appearance somewhat resembled Tsugikuni. So the only reason Muzan is afraid of Tanjiro is because of the Hanafuda earrings he possesses, which acted as a reminder of his downfall.
Despite losing his memories, Akaza was noted to have subconsciously retained his strong feelings for Koyuki, this is seen where Doma noted that Akaza absolutely refused to kill and eat women during his hundreds of years as a Demon, despite his obsessive desire for more strength and power.
Anne was a kind and loving soul and was described as the only person that Muzan had truly loved, besides his three daughters.
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.