Muzan Kibutsuji is the main antagonist of the Demon Slayer anime by Koyoharu Gotouge.
Muzan is responsible for creating countless demons and taking countless lives to achieve a specific goal.
Muzan Kibutsuji is also known as the King of Demons.
The main question here is Why did Muzan turn Nezuko into a Demon?
Before answering this question, let us look at a few facts being the reason for Muzan to create an Army of Demons.
Muzan’s ultimate goal is to be the most powerful being/demon to exist and be able to walk into the sunlight.
Walking into sunlight is the only inability that the demons have.
Muzan wants to overcome this ability as he cannot walk in the daylight, which harms him as well as all the demons.

How did Muzan Turn Nezuko Into a Demon: How can a human being be turned into a Demon?
The answer to the question took over 200 years for Lady Tamayo to figure out and turn a single Human into a Demon.
Lady Tamayo died on her quest to find the answers related to Demons.
Later, Lady Tamayo is turned into a demon by Muzan, but she is one of the nice demons who control herself, and she refrains from killing people. Lady Tamayo is also a doctor who helps people.
As per Lady Tamayo, Demons need human blood and flesh to survive and grow stronger, but that can also be achieved via sleep; like Nezuko, when she went into a deep sleep for 6 months, her body went through certain changes, and she became stronger and defeated one of the Upper Demon Moon 6 Daki.
On the other hand, Lady Tamayo drinks blood from blood banks to stay alive and can also use blood demon art, which is known as Scent Of Illusory Blood: Visual Dream.
Lady Tamayo used her Blood Demon Art to save Tanjiro as well.
Her Blood Demon art is Scent Of Illusory Blood: Visual Dream.
Lady Tamayo also has some connection to the Master of the Demon Slayer Mansion.
The Master of the Demon Slayer Mansion once mentioned Lady Tamayo to Tanjiro, saying give my regards to Lady Tamayo.
Lady Tamayo collects blood samples of many demons to examine the blood and find a solution to create a Demon back into a human.
Lady Tamayo is the only one apart from demon king Muzan Kibutsuji who can turn humans into demons.
As per Lady Tamayo, Muzan can turn any human into a demon in just a few seconds.
He just needs to scratch a human and give a tiny amount of his blood to one he turns into a demon.
As per Lady TamayoMuzan might have streamed his blood into Nezuko, which eventually led to Nezuko turning into a demon.
Even Giyu Tomiyoka was surprised to see that Nezuko was trying to save Tanjiro even in her transformation phase.
And that is the reason, Tomiyoka decided to let Nezuka go without harming her and sent her to Uro Kodaki( A former Hashira).
Why did Muzan turn Nezuko into a Demon in Demon Slayer?
This can be an incident that Muzan killed all the members of the Kamado Family and found the determination of Nezuko to save her younger siblings.
Due to this trait of not giving up, Muzan turned Nezuko into a Demon who would grow into a stronger Demon and could eventually develop resistance to sunlight.
Muzan then planned to devour that demon and become the most powerful and immortal being of all.
Muzan slaughtered all of Kamado’s family because he wanted all the users of sun breathing and the people who knew about Sun Breathing dead as they are considered the most powerful beings who possess knowledge of one of the strongest breathing techniques, i.e. The Sun Breathing Technique.
Yorichhi was the creator of Sun Breathing and defeated Muzan with the technique; therefore, Muzan didn’t want to face someone like Yorichhi again.
That’s why he wanted to eradicate all the people who had knowledge of Sun Breathing techniques.
All the other breathings ate weak imitations of the sun breathing, the Sun breathing being at the top of the hierarchy.
The different breathing techniques are derived from the Sun breathing Technique, as Sun Breathing is the hardest to master.
Muzan killed all the members who practised the Sun Breathing technique with the help of Kokushibo.
Lastly, there was Kamado Family left, who used the Sun Breathing when doing their traditional Dance using Hinokami Kagura.
So Muzan might have got news about a Family who had knowledge about Sun Breathing.
And Eventually, Muzan decided to find them and kill them all.
He must have found something in Nezuko and turned her into a Demon.
Nezuko is the only Demon who has not consumed a single ounce of human flesh and blood.
Nezuko sleeps a lot to recover her body.
Nezuko was in deep sleep for six months, and during this time, her body might have undergone some changes that no one could understand.
Is There A Way To Turn A Demon into a Human Again?


Tanjiro is trying his best to get the answer to the question, Is there a way to turn a demon into a human again?
Tanjiro once asked lady Tamayo Is there a way to turn a demon into a human again.
Lady Tamayo answered there was a way.
Tanjiro was excited to know about this.
But then Lady Tamayo’s words to Tanjiro were:
“There is always some kind of medicine or aid no matter the wound or ailment.
I don’t know how to turn back a demon into a human yet, but there must be a way.
And I promise we are going to find it. We are dedicated to establishing such a treatment.”
Toward that end, Lady Tamayo asked Tanjiro to do something for her.
In order to discover a cure, the first step was studying the blood of several different demons.
Lady Tamayo asked for Tanjiro’s permission to study Nezuko’s blood.
Also, she asked Tanjiro for more demon blood samples.
Why did Muzan let Nezuko live?


Muzan has something planned something for Nezuko. As per our theory, when Muzan killed all the members of the Kamado Family, he found the determination of Nezuko to save her younger siblings.
Due to this trait of not giving up, Muzan turned Nezuko into a Demon who would grow into a stronger Demon and could eventually develop resistance to sunlight.
Muzan thought Nezuko could develop the ability to resist the sunlight in future as she was from the Kamado family, who use the sun breathing so that it might provide her with the immunity to sunlight that other demons lack, and that’s the reason why Muzan didn’t kill Nezuko, instead turned her into a demon.
Ultimately if Nezuko develops resistance to sunlight which she will in the Demon Slayer finale, then Muzan will devour the demon to become the strongest demon of all and immortal. That’s the only goal of Muzan.
More about Nezuko Kamado
Nezuko Kamado is Tanjiro Kamado’s sister and the deuteragonist of Demon Slayer.
When Muzan slaughtered all of Kamado’s family, he didn’t kill Nezuko and transformed her into a demon as part of his experiment to create a demon who could withstand sunlight.
When Tanjiro returned home and learned that his family had been slaughtered, he found Nezuko, who turned half demon and half human.
Unlike other Demons who generally attack humans, Nezuko seemed friendly towards humans as he refrained from killing Tanjiro and Giyu Tomioka.
Nezuko is the best-looking girl in Demon Slayer anime, which is why she is a fan favourite for the fans.
Unlike other demons, Nezuko doesn’t consume human blood or kill human beings.
To become stronger, she mostly spends most of the time sleeping and re-energizing herself so that if any danger comes, she can help her brother and humans.
Nezuko’s demon form is also extremely powerful in Demon Slayer.
We have seen this against her fight with one of the Upper Demon 6 Daki; she did blood manipulation, regeneration and immense strength to defeat Daki, and later on, when Tanjiro and Tengen Uzui managed to defeat Gyutaro Nezuko also, Tengen Uzui using her blood demon art to heal most of his wounds.
Plus, towards the end of Demon Slayer, we will also see Nezuko developing resistance towards sunlight, which even Muzan Kibutsuji can’t do.
Hope you have enjoyed our deep, insightful topic on Nezuko’s love interest.
For more exciting articles, please stay tuned.
Also Read: