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. For more
5 Hashiras who die in Demon Slayer, and how it happens.
But since the Demon Slayer: Kimetsu no Yaiba manga by Koyoharu Gotouge is complete, the fate of every Hashira- Flame, Serpent, Sound, Love, Stone, Wind, Water, Insect, and Mist, has been written in stone. So how did they fare? Out of the nine Hashiras, only one lived a full life- Tengen Uzui, the Sound Hashira.
2 Kyojuro Rengoku
Rengoku died smiling, but not before giving Tanjiro some words of encouragement. He told Tanjiro to keep living with his head held high and that time wouldn't stop just because he was grieving. Rengoku reminded Tanjiro to set his heart ablaze and keep fighting.
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. However, brawn is not the only way to determine power in Demon Slayer.
We first see Doma when he is still the Upper Moon Six while he is in the middle of eating a geisha. Later he becomes even stronger and rises to the position of Upper Moon Two. He dies because of the lethal amount of poison he absorbed through Shinobu Kocho's body followed by Kanao Tsuyuri beheading him.
However, Giyu Tomioka does not marry anyone in Demon Slayer manga. While romantic subplots do exist in the series, Giyu's character arc focuses primarily on his growth as a warrior and his relationships with fellow 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.
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.
At some point, Daki fought, killed and ate seven Hashira.
One fateful day, Kanae was attacked by a demon, which turned out to be Upper Rank 2 Doma. He did not have time to eat her, and left her fatally wounded and her injuries took her life as the sun rose. This left a big shadow on Shinobu and Kanao, even today.
Towards the final arcs of the manga, Tanjiro is mortally wounded and dies during a fight with the Demon King Muzan. Though Muzan is also seriously injured, he uses the last of his powers to turn Tanjiro into a demon.
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.
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.
Before the final blow was struck, killing the Demon King, Muzan took down with him some heavyweights namely Obanai Iguro, Mitsuri Kanroji, and Gyomei Himejima— the last of whom is crowned as the most powerful Hashira. By the end of the manga, only Sanemi and Giyu were the only Hashira remaining.
The first of the Twelve Kizuki that was encountered in the series was the former Lower Rank Six, Kyogai, who is slain in battle by Tanjiro Kamado.
Nezuko and Tanjiro return to the Butterfly Mansion where they live until old age. Demon Slayer then ends with a significant timeskip forward several generations of the Kamado family; Nezuko has already died of old age, but at least she got the opportunity to enjoy a healthy and long life as a human.
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.
After the battle, Tanjiro returns home with his sister and friends. Later it is revealed that he married fellow slayer Kanao Tsuyuri. In the Modern World, Tanjiro and Kanao had descendants named Sumihiko Kamado and Kanata Kamado.
In Chapter 205, we see Obanai and Mitsuri reincarnated and married, as they promised before they died, and they are running a restaurant together. In the volume extras it is revealed that they have five kids.
After the final battle
At the end of the chapter, there is a picture of Inosuke giving acorns to Aoi while she smiles. It is confirmed in the Volume 23 extras that Inosuke and Aoi did eventually end up together and that they have two great-grandsons, one of which is Aoba.
But the crowning moment of his achievements is when he epically slices off Daki's head and makes a run for it—after all, she won't die until her brother's head is also sliced. Unfortunately, Gyutaro spots Inosuke and stabs him right through where his heart should be with a sickle imbued with deadly poison.
While there were numerous remarkable moments in episode 9, one scene, in particular, captured the collective attention of fans worldwide, the beheading of Gyokko. In a stunning display of precision, the head of the formidable Upper Moon 5 Demon is cleanly severed, and his body swiftly turns to ashes.
How Doma became the worst demon in Demon Slayer. Almost every creature possesses emotions, be it anguish, sorrow, happiness, or even fear. However, in the case of Doma, he doesn't feel a thing. During his childhood, his mother stabbed his father to death for cheating on her and, later on, took her own life.