Just like with any other Shonen anime series, the final arc of Demon Slayer is the one with the most powerful characters from the sides of both the heroes and the villains. In the final battle, both sides brought forth their most powerful characters in order to get the win over their enemies to see who reigns supreme.
Admittedly, the final battles did ultimately have stronger demons due to their enhanced speed, strength, and seemingly magical techniques. Because of this, they make up the brunt of this list, though some notable Demon Slayers exist within this tier of power. So, let's go over the strongest characters in the Infinity Castle arc.
The Strongest Demons In Demon Slayer
There are several powerful demons present in the Demon Slayer anime. These characters are the most dangerous.
Gyomei Made His Mark As The Strongest Hashira
Technique: Stone Breathing
- The strongest Hashira of the current era.
Although Tanjiro was the only one to unlock Sun Breathing, he was still below Gyomei by the end of the series. Due to his mastery of Stone Breathing and his incredible stature, Gyomei's physical might was second to none, displaying it perfectly in the Infinity Castle arc when he became one of the few to take on the Upper Rank 1. Upon activating his Demon Slayer Mark, many believe that his contributions to defeating Kokushibo were the greatest of them all, cementing his place as the strongest Hashira.
Akaza Took On The Combined Strength Of Giyu And Tanjiro
Technique: Destructive Death
- Upper Moon 3.
Ever since his very first appearance when he managed to kill Rengoku, fans have known that Akaza would be one of the biggest threats in the final arc. Ultimately, their fears would come true as Akaza managed to take on both Giyu and Tanjiro at once, both of whom had activated their Demon Slayer Marks and had even mastered the Transparent World. At the end of it all, both Slayers were about to meet their demise at the hands of the demon, only for him to turn the attack on himself. Had it not been for Akaza's change of heart, he would have won against Tanjiro and Giyu.
Demon Slayer: Every Known Member Of The Twelve Kizuki, Ranked By Their Blood Demon Arts
Demon Slayer's Twelve Kizuki are incredibly powerful foes, and their Blood Demon Arts play a big role in that. Here's how their abilities rank.
Douma Showed Incredible Mastery With His Technique
Technique: Cryokinesis
- Upper Moon 2.
Douma was one of the most overpowered characters in the entire series. Just like Akaza, his strength was far too great for any one Slayer to deal with, which is why Inosuke and Kanao had to team up in order to take him down for good, which still wouldn't even have been possible without Shinobu's sacrifice poisoning the demon from the inside. Due to his incredible manipulation of ice to form massive and powerful structures, Douma's technique was something out of a different series and was terrible to behold.
Kokushibo Blends Slayer Arts With Demonic Powers
Technique: Moon Breathing
- Upper Moon 1.
Although he started his journey as a member of the proto-Demon Slayer Corps, Kokushibo eventually got turned into a demon, allowing him to mix his demonic gifts with his legendary Moon Breathing technique. This made him the strongest of Muzan's henchmen by far, as it took most of the remaining Corps to work together to defeat him. Due to the insanely broken properties of his Moon Breathing, he outclassed every swordsman who fought him. However, just like Akaza, he met his end on his own terms by letting the heroes kill him after he got disgusted by what he became.
Demon Slayer: Saddest Deaths In The Series, Ranked
As Demon Slayer's narrative continues, a lot more characters meet a tragic end. But, which deaths hit the hardest by the end of this story?
Muzan Was the Progenitor Of All The Demons In The World
Technique: Biokinesis
- The father of demons.
The entire plot of the Demon Slayer series began because of Muzan's doing, which birthed demonkind into the world. Although many fans were disappointed over the fact that Muzan's Blood Demon Art was nothing more than him just swinging massive whips around. Despite this, the strength of these whips and Muzan's complete control over all demonkind made him the perfect final enemy for the series, showing that despite his fairly straightforward technique, Muzan's strength was horrifying, requiring the entirety of the Demon Slayer Corps to work together to bring him down.
Yoriichi Was The Progenitor Of Breathing Styles And The Greatest Slayer Ever
Technique: Sun Breathing
- The original Demon Slayer.
Yoriichi was undoubtedly the man who started it all. Around 500 years before the start of the story, the plague of the demons was even worse than in the modern era due to the lack of ways to counter them. In response, Yoriichi eventually mastered swordsmanship and birthed Sun Breathing, which became the basis for all the breathing styles that exist in the modern era.
However, none are as potent or powerful as Sun Breathing, which only Yoriichi was ever able to completely master. This allowed him to fully call forth the power of the Sun in his swordsmanship, which meant that not even Muzan was able to do anything to him. Although Yoriichi was only in a brief flashback, his strength makes him the most powerful character in the entire Demon Slayer franchise.
Demon Slayer can be streamed on Crunchyroll and Netflix.
