Apart from that, Muzan doesn't hate Akaza because of his obedience. 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
Muzan became fond of him, due to his loyalty, will to become stronger and gave him special permission to not eat women. Following his first encounter with Tanjiro, Akaza meets with Muzan to report the events which had occurred.
As stated by Doma, that Muzan had tolerated and allowed Akaza's unique aversion to not eating or harming women and even only went as far as only dispatching him on special missions only, a privilege not even given to Upper Rank 1 or 2. He was one of Muzan's favorites since he was loyal and serious.
2) Akaza. 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.
Muzan is displeased with Akaza's "accomplishment", declaring that one victory is meaningless until the entire demon slayer corps are destroyed and that Akaza failed to kill the other three Demon Slayers at the train. He punishes Akaza by making him bleed profoundly and dismisses him.
1 Muzan Regretted Killing His Doctor
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.
Shinobu Kocho's tragic backstory is one of the most heart-wrenching in Demon Slayer. She and her sister, Kanae, were orphaned at a young age after their parents were killed by a demon.
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.
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.
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.
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.
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.
While the manga did not explicitly mention the reason, it could be because of Koyuki's effect on Akaza back when he was human. As someone who practiced a form of martial art, he had honor and followed a set of principles. This could be another reason why Akaza didn't kill women.
3 Muzan Mainly Liked Daki Because Of Her Potential To Earn Money.
Muzan knew Enmu failed his mission so he sent Akaza because he thought Akaza could kill Tanjirou.
Tsukito, Yorogi, Kuraku, and Isatsu all agree that they are loyal to Muzan.
Muzan was diagnosed with a very rare unnamed illness and should have died at the age of 20. His doctor then traveled all around Japan and found the mystical Blue Spider Lily.
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.
Being a demon, Muzan is capable of living for many, many years. However, unlike other demons that have aged over hundreds of years. Muzan is well over 1000 years old.
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.
The Wind Hashira has one of the saddest backstories in Demon Slayer. His mother had turned into a demon and had killed five of his siblings. He was forced to kill his own mother in an attempt to save his only remaining brother, Genya.
The young Tanjiro is not only one of the greatest demon slayers, but thanks to his kind nature, he's also one of the most honorable characters of the series. Tanjiro not only showed selflessness and love towards his sister and the people he cared for but even showed kindness towards his demonic enemies.
Since she's the Love Hashira, it just makes sense for Mitsuri to be one of Demon Slayer's kindest and most compassionate characters. She always compliments the people around her, even if it's just mentally. She can also find everybody's best qualities.