Yoriichi Tsugikini. Yoriichi Tsugikuni is the strongest demon slayer character to have ever existed in the series. He is also the only person that Muzan was ever afraid of.
Yoriichi Tsugikuni. Yoriichi Tsugikuni is the strongest demon slayer ever, as he was born with the demon slayer marks. He single-handedly invented the original sun-breathing style.
1 Kibutsuji Muzan
In the anime, little is known about Kibutsij Muzan and his powers, other than he is the Demon King and creator of all demons. He is both respected and feared by his underlings and is the sworn enemy of the Demon Slayer Corps.
Shinobu Kocho is a capable Demon Slayer whose worthy of being the Insect Hashira. That being said, she's arguably the weakest Hashira when it comes to pure strength.
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.
Does Tanjiro have the skills to become a Hashira? Although Tanjiro remains at the fourth bottom of the hierarchy in the Demon Slayer Corps, he has always been strong enough to become a Hashira. Just the fact that Tanjiro has a fully developed permanent Demon Slayer Mark is a testament to his skills.
1 Muzan (Demon Slayer)
Without that antidote, it would have been impossible to kill him. So despite all her strength and humanity, Nezuko would have easily lost to Muzan.
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.
Not only that, but his Muzan-like Blood Demon Art made him more powerful than all demons as well. Towards the end, Yushiro, the traveling companion of Tamayo, mentioned that Tanjiro had “tremendous potential” as a demon and would have been stronger than Nezuko and Muzan.
Throughout the series, Tanjiro is seen to be a powerful fighter never backing down from a fight. He has incredible swordsmanship and enhanced superhuman characteristics, his superhuman abilities such as heightened senses and immense intellect gives him a superior edge when battling with opponents.
Tanjiro's Current Demon Slayer Rank Is Kanoe
Not many of the Demon Slayers' ranks are known as of Season 2, but there are a few. Tanjiro, Zenitsu, and Inosuke have moved from Mizunoto up to Kanoe due to their exploits. Murata, the Demon Slayer, who was almost digested on Mount Nagumo, is also a Kanoe.
Going beyond this, Giyu is one of the most combat-proficient Demon Slayers seen throughout the entire series. Furthermore, his strength and abilities are always portrayed as seemingly a cut above the rest of the Hashira, solidifying his expected victory against Tanjiro.
The Thirteenth Form of the Sun Breathing Style is unique in the sense that it doesn't really have a name of its own. Rather, it's a combination of all the twelve forms present in this style, used in succession to maximize their power. This move was devised by Tanjiro solely to defeat Muzan.
5 Hashiras who end up dying in Demon Slayer (and how it happens) Demon Slayer has showcased many characters that vary in personality, strength, and overall combat abilities.
Anne was a kind and loving soul and was described as the only person that Muzan had truly loved, besides his three daughters.
Many Kimetsu no Yaiba fans deduce that Yoriichi is Tanjiro's father, but that isn't the case. However, Yoriichi is responsible for teaching Tanjiro's ancestors the Hinokami Kagura, which has been passed down for generations.
Thus, Muzan created demons for hundreds of years even when he didn't want to turn someone. 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.
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.
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.
1 Gyomei Himejima - The Stone Hashira
The oldest of the bunch, the Stone Hashira, Gyomei Himejima is 27 years old.