After various battles within the Dimensional Infinity Fortress the remaining Upper Moons are killed by the hands of various Demon Slayers. The last member, Upper Moon Four Nakime, ends up being killed by Muzan Kibutsuji himself to stop the Dimensional Infinity Fortress from being controlled by his enemies.
Fortunately, Zenitsu was able to single handedly beat the Upper Moon 6. Not only did he defeat the demon, he also created a seventh form called the Flaming Thunder God. These are the demons who have been given the title of Upper Moon 6 in Demon Slayer.
The fight with Kokushibo, the highest-ranking demon among Muzan's servants, is over. Although Himejima and Sanemi defeated Kokushibo and sent him to hell, the price the Demon Slayer Corps has paid is very high.
The Upper Moon 2.: Shinobu Kocho poisoned him by sacrificing herself in the Mugen Castle. Then Kanawo Tsuyuri and Inosuke Hashibura cut his head off. The Upper Moon 3: Tanjiro Kamado and Giyu Tomioka cut his head off in the Mugen Castle, but his head was about to be reproduced.
How did Tokito defeat Upper Moon 5 Gyokko so easily in Demon Slayer?
After the deaths of Daki and Gyutaro, Kaigaku was promoted to become Upper Moon Six of the Twelve Demon Moons due to his power and confronted Zenitsu as a rematch he always desired.
With that said, all Hashira in Demon Slayer have one glaring flaw: they're only human. As such, they're not infallible and are certainly not tougher than their demon enemies. This results in some rather lopsided matches and emotionally-charged oversights on their part.
Tanjiro Kamado and Giyu Tomioka vs Akaza is a battle that takes place in the Infinity Castle, between Demon Slayer Tanjiro Kamado and the Water Hashira Giyu Tomioka against Upper Rank Three Akaza.
After various battles within the Dimensional Infinity Fortress the remaining Upper Moons are killed by the hands of various Demon Slayers. The last member, Upper Moon Four Nakime, ends up being killed by Muzan Kibutsuji himself to stop the Dimensional Infinity Fortress from being controlled by his enemies.
When he became 20 he met Muzan Kibutsuji who transformed him into a Demon. As a Demon, Doma becomes stronger by feasting on many, many female humans who, according to Doma, better to eat because they have many nutrients inside them that are used to nurture babies.
Tanjirō's resemblance to Yoriichi (like from Muzan's perspective), would trigger his memories and cause him to accept death. AND since its against Kokushibō and not Muzan, there's not poison that'll mess him up. So I would say Tanjiro would win.
Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery that compliments his position as Upper Rank One.
The divine nature of Sun-Breathing is the reason Tanjiro Kamado bears such a striking resemblance to Yoriichi, even though the two are not related.
Daki (Upper Rank Six, formerly)
After becoming a Demon Daki grew strong enough to kill and eat seven Pillars and gained the attention of Muzan Kibutsuji who allowed them to join the Twelve Demon Moons. She later dies after being beheaded by Zenitsu Agatsuma and Inosuke Hashibira.
However, when Keizo and Koyuki eventually got killed, Akaza went berserk and ended up killing more than 60 people just with his bare hands.
Gyokko (玉壺 Gyokko) is a member of the Twelve Demon Moons and holds the position of Upper Moon Five in the Kimetsu no Yaiba (Demon Slayer) series.
When it comes to pure strength, Shinobu Kocho is the weakest Hashira in Demon Slayer. She doesn't even have enough strength to decapitate a demon's head and she makes up for it by injecting poison into the demons.
Giyu Tomioka and Sanemi Shinazugawa attend as the final surviving members of the Hashira, and together they they get a confirmation that not only are the demons all eradicated, but that the Demon Slayer Corps will be disbanding.
While Mist Breathing has six forms, he created a Seventh Form: Obscuring Clouds during the fight with an Upper Rank Demon. Muichiro can defeat Akaza easily with his petite body that leverages his speed. Moreover, his ability of Transparent World can aid him in landing a fatal blow on Akaza's weak spot.
It affects even the strongest of the Upper Rank demons. This would be effective against Akaza because the only people he refuses to eat are women, since that goes against his morals. Sanemi also has excellent control of his muscles, saving himself from fatal injuries by closing them up himself.
Demon Slayer's Tengen Uzui is considered to be one of the weakest Hashira due to almost losing this fight, but the fact is that Tengen only looks weak when compared to the most overpowered Hashira.
5/14 Fastest Hashira In Running
Despite his large and muscular build, Tengen Uzui is the fastest runner among the Hashira.