Giyu was the first Hashira to be introduced in the series, making his debut in the very first episode. After rescuing Tanjiro from the newly transformed demon Nezuko, Giyu prepares to execute her as he would any other demon.
1. Gyomei Himejima. Gyomei Himejima, the Stone Hashira, is the strongest Hashira in the Demon Slayer corps in terms of strength and swordsmanship.
The second oldest Hashira, the Sound Hashira, Tengen Uzui is 23 years old. He played a big role during the Entertainment District arc but retired from his role as a Hashira and Demon Slayer corps member after those events, a decision heavily judged by Obanai.
As for the "first ever Hashira"...that is unknown. As for the "last ever Hashira"...that would be Shinazugawa-san as well as Tomioka-san.
Yukire Hanazawa ( 花沢 はなざわ 雪 ゆき れ, Hanazawa Yukire?) is a Demon Slayer and the Ice Hashira ( 氷 こおり 柱 ばしら , Kōri Bashira?) of the Demon Slayer Corps.
Specifically, Muichiro is the Mist Hashira who made use of the Mist Breathing sword style. He is 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.
The Water Hashira, Giyu, survived the "Infinity Castle" arc after fighting beside Tanjiro against Akaza and Muzan.
At just 18 years of age, Shinobu is the second youngest Hashira. Her demeanor may come off as childlike and even eerily cheerful, but she does what she can to hold herself together. Like Sanemi, Shinobu has an intense hatred for demons after losing her sister Kanae and both their parents.
Tengen Uzui
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.
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.
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.
Technically, the elder of the two Sakuras` was actually Muzan`s child, by way of his mistress (Lady Jade Wong), who had one of her eggs inserted into Anne`s body.
Sanemi's blood is known to be enticing yet intoxicating to Demons, which he used to bait and stab Nezuko. Sanemi is clearly the least popular Hashira among Demon Slayer fans.
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.
Despite being a bit older than Tanjiro, Zenitsu Agatsuma doesn't generally come across that way since his natural disposition is to flee. Although he doesn't always show it, Zenitsu is far from incompetent with a weapon, a familiarity stemming from his training-fueled upbringing as Jigoro Kuwajima's pupil.
Akaza's appearance as a human at the age of 18.
Some of the characters who have faced Yoriichi and survived
This happened due to a treatment that had gone wrong. While he was being treated, Muzan killed the doctor because he was not able to observe any results.
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.
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.
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.
Post-Transformation
Sensing their despair, Doma offered a chance to him and turned both Gyutaro and Daki into demons.
Obanai Iguro is one of the harsher Hashira members. He demanded that Giyuu be punished for allowing Nezuko to get away unharmed, and later restrained Tanjiro as he tried to help his sister. He hates demons and has little regard for his fellow Hashira, except Mitsuri Kanroji later on.