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.
8/13 Shinobu Kocho, The Insect Hashira
That being said, she's arguably the weakest Hashira when it comes to pure strength.
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.
The Hashira are weaker than the Upper Moons. It has already been stated that the Hashira has killed multiple lower moons, while Upper Moons have killed and eaten many Hashira. Akaza lost to Tanjiro and Giyuu because he chose to.
Many people believe she's the weakest because of her being physically weak and her loss against Doma.
2) Sanemi Shinazugawa
He dedicated all his time and effort towards perfecting his skills as a swordsman which was shown during the fight against both Muzan and Kokushibo.
5/14 Fastest Hashira In Running
Despite his large and muscular build, Tengen Uzui is the fastest runner among the Hashira.
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.
Gyomei Himejima is the strongest Hashira in Demon Slayer. Even the Hashiras who are filled with pride, acknowledged his skill and strength. As a child he was able to save a child from a demon by physically beating it for hours. He, along with Sanemi Shinazugawa were able to beat the Upper Moon 1, Kokushibo.
Mitsuri. The love Hashira and upcoming featured character of season 3, Mitsuri is best known for her extreme affection for everyone in the Demon Slayer Corps.
1) Shinobu Kocho
The Insect Pillar of Demon Slayer Corps, Shinobu is undeniably the smartest individual. She might not be physically stronger than others, but her intelligence is what kept her going.
Sanemi is quite possibly one of the rudest Hashira to have ever existed. Although he's a powerful individual, as seen in the manga during his fight against Doma, one of Muzan's 12 Kizuki, he severely lacks people skills. Sanemi's rise to unpopularity stemmed from his treatment of Nezuko the first time he saw her.
Sound Hashira
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.
Unfortunately, not all of these elite warriors make it out of the series alive, and none of them make it to the end in one piece. The manga for Demon Slayer: Kimetsu no Yaiba concluded some time ago, so the ultimate fate of each Hashira has already been established even as the anime soldiers on.
Kyojuro Rengoku surpasses Tengen on many levels, be it strength, Breathing Technique, or battle Intellect. So to cut a long story short, Kyojuro Rengoku is more powerful than Tengen Uzui.
Specifically, Muichiro was the Mist Hashira who made use of the Mist Breathing sword style. He was also the youngest of the Hashira at only 14 years old, being considered a prodigy of the Corps who became a Hashira only two months after joining the Demon Slayers.
As it turns out, Tanjiro has received a few promotions during his service. However, saying that Tanjiro has become a Kanoe doesn't mean much on its own. The Corps' ranks and functions are fairly straightforward.
The purpose of the Tsuguko is to take the place of the Hashira they serve, if and when said Hashira is put in a position where they can no longer fulfill their role as one of the champions of the Demon Slayer Corps, such as when the Hashira retires or dies.
2) Rengoku
However, Rengoku was forced to face off against Akaza who was Upper Moon 3. The Flame Hashira carried out his duties until his death as he did not let his comrades get injured.
Over a century ago, Doma held the position of Upper Rank Six ( 上 じょう 弦 げん の 陸 ろく , Jōgen no Roku?), and during that tenure, he turned Gyutaro and Daki into demons and introduced them into the Twelve Kizuki.
5/10 Did Not: Tengen Uzui Retired Before Getting His Mark
The Hashira began obtaining their marks after the Upper Moons appeared in the Swordsmith village, an event that occurs immediately after the Entertainment District Arc that Tengen battles in. After his fight against Daki and Gyutaro, Tengen had to retire.
i know, though, some believe he loves hina (21) the most, because he had the most interaction with her in the manga and they have the most “husband-and-wife” feel. we also have to remember that suma (19) was tengen's first chosen wife—they both personally agreed to letting hina and makio (20) into their relationship.
During his battle with Gyutaro, Tengen used his muscles to stop his heart to temporarily prevent the poison from circulating, which let him get the drop on Gyutaro who believed he was dead.