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.
Unfortunately, many fan-favorite characters met brutal, untimely demises in Demon Slayer, and the Hashira certainly weren't an exception. Some of their fates, however, were much sadder than others. On a positive note, none of the Hashira died in the Swordsmith Village arc.
There are nine total active Hashira in the anime. Each Hashira has their own region to patrol, as well as their own unique style, Breathing Technique, and abilities.
After the fight, he tries to find Mitsuri, and both confess the love they had for each other. Obanai held Mitsuri in his arms, and the two succumbed to their injuries. These were all the Hashira who died in the series. The only Hashira who have survived are Tegen, Sanemi, and Giyu.
Well, you'd be delighted to know that Tengen Uzui doesn't die fighting against Gyutaro and Daki. However, the Sound Hashira does die in the manga, but that happens far in the future. In the manga, the fight between Uzui and the sibling demons gets ruthless, and Tengen gets badly injured from Gyutaro's poisoned sickles.
Like most of the characters, Tengen Uzui does have a descendant that looks just like him. His descendant is named Tenma Uzui and he's an Olympic-level gymnast representing Japan.
1) Kyojuro Rengoku
Unfortunately, Rengoku was killed by Akaza, the Upper Moon 3. This took place when he, along with Tanjiro, Zenitsu, and Inosuke, boarded the Mugen train to investigate cases of missing people.
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.
Yet, for some reason, Tanjiro Kamado, the series' protagonist, never becomes a Hashira. Demon Slayer's protagonist Tanjiro Kamado starts out as an ordinary boy but has his entire life turned around after his family massacre. To make matters worse, his only surviving family, Nezuko, is turned into a demon.
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.
Rengoku died at the end of the Mugen Train arc. He succumbed to his wounds after realizing he didn't stand a chance against Akaza, who shamelessly fled the scene as soon as the sun came up. Rengoku died smiling, but not before giving Tanjiro some words of encouragement.
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.
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.
Shinobu Kocho (The Insect Hashira) While we don't necessarily think Shinobu Kocho is physically weak by any means, we do believe that she is currently positioned at the bottom of the totem pole compared to her fellow Hashira members.
Shinobu Kocho Is the Weakest Hashira
Of the three Hashira who were killed by Upper-Ranks -- Rengoku, Shinobu and Tokito -- Shinobu was the only one who was killed almost instantly when she encountered Doma, Upper-Rank Two.
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.
Shizuka is seen often teasing Sanemi and making him annoyed, nevertheless, the two had still created a strong bond and relationship with each other. Eventually, after knowing each other for a while, Shizuka finally ended up having the courage and confessed, leading to them getting married after awhile.
The Water Hashira, Giyu, survived the "Infinity Castle" arc after fighting beside Tanjiro against Akaza and Muzan.
So Kyojuro basically has little to no choice but to dedicate himself to the way of the flaming swords, and become the next Flame Hashira.
During Tanjiro and the rest of the Hashiras' showdown with the Demon King Muzan, Tanjiro is mortally wounded and dies. At the same time, Muzan receives a particularly fatal lil' booboo himself. As Muzan is about to shuffle off the mortal coil, he uses the last of his powers to turn Tanjiro into a demon.
Before he is able to regenerate fully, Tamayo appears and uses her Blood Demon Art to keep him in place, while using a drug that can turn him into human. Using this opportunity, Gyomei Himejima appears and destroys Muzan's head.