Warning: Spoilers ahead.
Which do you prefer, a cute girl or a strong girl? What if you can have both? That is what female characters in most anime: they are cute, strong, and can strangle you with their bare hands. The female characters in Demon Slayer (Kimetsu no Yaiba) are no different.
They are strong-willed, fearless, and cute. Do not let their beautiful smile fool you; these women are no strangers to battles. They may have different reasons to fight, but there is no denying they can be one of the strongest female characters to look up to.
In Demon Slayer, women are either a demon or humans. Some could immediately conclude that demons are stronger than humans, but that is not necessarily the case, as some humans have extraordinary skills that could easily defeat demons.
It would be a long discussion about how to rank them, but the best way to do that is to compare their skills and abilities. Here is a list of the top ten strongest female characters in Demon Slayer ranked according to their ability.
Older Sister Spider Demon
Out of fear of demon slayers, she teamed up with Rui and other demons in Natagumo Mountain. Despite being cowardly and always running, she is one of the strongest female characters, given that she had killed 80 humans while residing in the mountains.
These humans were not eaten immediately but instead stored in her spider web that could be consumed later. Shinobu discovered this when she defeated her while helping the newer demon slayers.
She could shapeshift so she would have the same appearance as Rui and be part of the family. She has spider-like abilities, like making spider webs and having keen eyesight.

Mother Spider Demon
Being able to command an army of small white spiders is not easy. It would help if you had immense power to do that. She can even control still-alive demon slayers.
She is extremely skilled in puppetry because she can still manipulate living beings, and they are demon slayers. It is noted during her fight with Tanjiro and his friends that the spider web thread she uses is harder and stronger than the others.
It was known that she was a demon in the mountain. When Rui came to the mountain, they joined her family, and she was forced to change her appearance to suit her role as the family’s mother. Her special skills include spider-like abilities, string manipulation, and puppet control.

Kanae Kocho
The Flower Hashira is one of the strongest. She may have a carefree attitude, but she is one of the strongest, being a Hashira who fought against Doma, the Upper Moon 2. She might have lost to him, but that does not mean she is weak.
She stood on her feet after losing her parents to demons. She is also soft-hearted for saving a child who was a victim of slavery. It is not easy to raise a child who cannot speak. These feats may not be physical strengths but emotional strengths.
The ordeals she had to go through were so many that most ordinary humans would not be able to survive. She had mastered the Flower Breathing Style and could fight toe to toe with Upper Moon 2, Doma.

Daki
After almost dying at the hands of a samurai, Daki became a demon. She grew up in a less privileged life and worked as a courtesan in the Red Light District. Despite being such a young girl, she worked to feed herself and her brother.
After almost being killed by the Samurai by having her tied and burned, she became a demon and started eating the finest people in the Red Light District. She was able to fight one of the strongest Hashira, Tengen Uzui. While she died, her Demon Blood Art was one of the strongest and made the Red Light District Art have one of the best fight scenes.
As a courtesan, she is seductive; as a demon, she is ruthless. Do not be fooled by her outer appearance; she had eaten 7 Hashira in the past, and she has a great regeneration ability proven to be bothersome to the squad of demon slayers led by Tengen Uzui.
Daki also has immunity to the Nachirin sword, so she could not easily be decapitated. She also has immense speed and reflexes. Her thunderclap is used to coordinate her attacks with her brother. Being an Upper Moon demon is already a credential that she is one of the strongest.

Tamayo
Her knowledge about demons and demon transformation can make even Muzan afraid of her. She is highly intelligent, which makes her scary. As a doctor, she is capable of healing both demons and humans.
Holding a grudge against Muzan for as long as she lives is not easy. She is even capable of escaping from him and hiding from him. Few demons can do that. Some demons cannot even escape Muzan, let alone hide from him.
She can use her blood to cast different spells. She also created a drug that could stop the demon blood’s progression; this drug was used for Zenitsu so he would not turn into the demon.
She also created a four-phase drug that can greatly weaken Muzan. She collaborated with Shinobu Kocho and Yushiro to create this drug. The first phase of this drug was used on Nezuko so she could be human again.

Shinobu Kocho
The strength of the Insect Hashira was first shown in the battle against the spiders in Natagumo Mountain when she killed the Older Sister Demon Spider with one swoop of her sword.
Shinobu has a jolly and carefree personality, but her hatred for demons who killed her family and friends has been so immense that she has been working tirelessly, even collaborating with Tamayo, to ensure they can create a drug that can eliminate demons.
Being a Hashira and going through all their hellish training, she has extreme stamina and endurance. She can go toe-to-toe with Doma and other demons without getting exhausted. Her Insect Breathing style allows her to have the ability of the insect, such as flexibility, speed, reflexes, and agility.

Kanao Tsuyuri
The Kocho sisters rescued Kanao from the black market. Later she became their adopted sister and became a member of their household.
She is also the Tsuguko of Shinobu Kocho despite not having the same breathing style as her. Kanao is known to have good swordsmanship, having learned the Flower Breathing by watching her older sister Kanae.
When she fought against Doma after Shinobu was killed, she verbally attacked him. The verbal attack was so strong that Doma lost his composure for the first time. During the rehabilitation arc, her immense speed and reflexes were displayed when she trained with Tanjiro.

Nakime
Nakime was able to kill humans even before she was a demon. She killed so many because she had to do that before she played the instrument. She is seen as a mysterious woman used to summon the Moons.
At first glance, she may seem weak, but who else can control the Infinity Castle as if it is a part of their body? Nakime may seem timid and have few words to say, but she is one of the strongest.
Muzan even applauded her investigation skills as she could locate Muzan to kill him before she played her biwa in an establishment.

Nezuko Kamado
Nezuko has a different strength. She draws it from the will to protect her brother. Her Demon Blood Art is used mainly to aid her brother when fighting another demon.
She had been toe-to-toe with demons that were seen as stronger than her. In their fight against Rui, it can be seen how Nezuko easily snaps the silk spider web that her brother cannot break with his sword. She has very strong fingernails and can easily snap demons in two.
In different fight scenes, Nezuko could decapitate the demons they are fighting. It was later discovered that Nezuko is immune to sunlight, and Muzan desires her blood more than anything. Nezuko can also transform so she would fit in a box that her brother would carry around during the day.

Mitsuri Kanroji
The smiling face of the Love Hashira should not fool you. This woman can decapitate you in an instant.
She is one of the strongest Hashira; even if ranked with men, she can come second or third. Her swordsmanship and strength work hand in hand, enabling her to control her sword.
Her sword is so thin that it is used more like a whip than a sword. She was one of the few who could finish the Final Selection Exam with only six months of training. She has precise swordsmanship and can cut through thunder and sound waves.
Her muscles are denser than any regular man’s. This is the reason why she wants to join the Demon Slayer Corps. She could not find a regular man who could be stronger than her.
