Yoriichi is the most powerful known character in the history of the series and the most powerful swordsman and Demon Hunter, born with the Demon Slayer Mark and the Transparent World. As a kid not trained in sword skills, he was able to defeat a trained sword instructor and was called a miracle.
1 Kibutsuji Muzan
He is both respected and feared by his underlings and is the sworn enemy of the Demon Slayer Corps. Muzan's only weakness is his aversion to the sun. Even if he is beheaded, his regenerative abilities allow him to regrow it, unlike other demons.
In his own franchise, Tanjiro is outclassed by most of the nine Hashira as of the end of season 1, including Giyu Tomioka. It's easy to compare Tanjiro's strength to Giyu's — since they are both demon slayers — and they even use the same element: water.
Demon Slayers are known for their strength and bravery in battle, but not Zenitsu. Despite his cowardice, he's one of the strongest in the series.
Sanemi is inarguably one of the strongest Hashira in Demon Slayer who has the potential to gain victory over Giyu. Both the characters possess immense speed and endurance, and they also can take on an Upper Rank demon head-on.
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.
Alucard from Hellsing Ultimate is not your regular bloodsucking vampire. He's one of the anime characters who could potentially defeat Muzan Kibutsuji with a single blow. Alucard is known for his cold, calculating personality, which is matched only by his incredible powers.
The flashback also reveals that Yoriichi had a twin brother named Michikatsu Tsugikuni, who became a Demon Slayer but later turned into a demon and became Upper Moon One, Kokushibo.
Tanjiro decapitates Akaza with the Hinokami Kagura: Setting Sun Transformation. Akaza was bewildered, wondering how Tanjiro did not have any fighting spirit, comparing this feeling to fighting against a plant. He acknowledges that Tanjiro surpassed his speed.
In conclusion, Tanjiro will not be able to kill Muzan by himself since the Demon King is far superior in every aspect of combat. The manga has shown fans the singular way that Muzan could be bested and it was only due to the collective efforts of Demon Slayer Corps members.
Shinobu Kocho Is the Weakest Hashira
The Insect Hashira, Shinobu's petite frame prevents her from being physically able to decapitate any demon, be it an Upper-Rank or the weakest demon in Japan.
While she might not be as powerful as Muzan himself, her overall strength makes her easily comparable to an Upper rank demon.
Nezuko's most significant trait, however, is her immense growth, which is likely due to a combination of the amount of blood she received from Muzan and her willpower. To conclude, Nezuko is a formidable powerhouse within the anime and is probably one of the strongest main characters in the series.
Tanjuro Kamado was the name of Tanjiro Kamado's father. He passed away before the event of the main story of the Demon Slayer.
Chapter 205 of Demon Slayer features a timeskip and mentions the death of Tanjiro three generations after the battle against Muzan. To sum things up, Tanjiro died fighting Muzan and was revived within seconds due to the transfer of blood from the Demon King to Tanjiro.
The only thing he's weak to is the sun. That is why he turned other humans into demons and spread his blood so that one of them might find a solution against the sunlight, so he can become truly perfect.
5 Hashiras who die in Demon Slayer, and how it happens.
Since he didn't know anything about the Blue Spider Lily medicine, he needed others to find the plant for him by happenstance. This is the general reason why Muzan turned Nezuko into a demon. More specifically though, was the fact that Nezuko was of Kamado blood.
Muzan Kibutsuji has done some terrible things in Demon Slayer, but his slaughter of Tanjiro's family is one of the most mysterious.
Muzan is a tall and muscular man, with an unnaturally pale skin complexion that can be easily confused as being unhealthy and sickly.
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.
Tengen Uzui
He is the fastest Hashira, and the second physically strongest. Obviously, then, Tengen Uzui is rather proud. He is demanding, fussy, boastful, and prone to selfishness. But he is also ultimately kind and caring, with great love for his three wives as well as the other Hashira.
Upper-Rank Three: Akaza
His Compass Needle ability allowed him to predict his opponent's moves, and even when Tanjiro neutralized the Compass Needle and decapitated him, Akaza's headless body continued fighting while his head regenerated.