During their battle with Muzan, Obanai and the other remaining Hashira are attacked by the Demon's flailing whips, and Obanai is left with three long scratches over his eyes, rendering him blind.
His eyes are almond-shaped and tilt upwards on the far sides, and are unusual due to Obanai possessing heterochromia—his right eye is yellow and his left eye is turquoise. He is partially blind, barely able to see out of his right eye.
Obanai has straight black hair of varying lengths, the shortest stopping at his cheeks and the longest reaching his shoulders. He has sharp pointed eyes with unusual eye colors due to him having heterochromia. His right eye is yellow and his left eye is turquoise.
Her raw strength is exceptionally high owing to her muscle constitution. However, Obanai Iguro is superior in terms of overall combat ability. The fact that he could go toe to toe against Muzan speaks volumes about his strength. He can beat Mitsuri Kanroji if the two face off against each other.
Later, he also enraged a battle against Nakime, the Upper-Rank Four demon. But the true test of Obanai's endurance came in the fight against Muzan. There, the Serpent Hashira endured an injury to his eyes, losing his eyesight completely.
However, manga readers know precisely how much power Obanai Iguro houses. He's easily one of the strongest members of the Hashira and can hold his own in a fight against the toughest demons around.
Muichiro Tokito: The Mist Hashira with a Mysterious Aura
His toughness, concentration, and immense strength make him an unbeatable force, and he is widely regarded as the strongest Demon Slayer in the Corps.
Despite his battle intelligence and the ability to see through enemies with the Transparent World, Obanai doesn't stand against Akaza. He is slower, and his strength is subpar to the demon.
He is partially blind as he can barely see out of his right eye. Obanai's mouth is also unusual in that, when he was twelve, it was cut from its corners to his ears to make it appear more like that of a snake, leaving a large wound that he keeps hidden under the bandage he wears over his lower face.
Obanai fell deeply in love with Mitsuri when he first met her. He's strongly protective of her and dislikes it when other people or demons call her dumb or air-headed. Obanai also becomes jealous when Tanjiro says he spent some time at Mitsuri's estate and is extra hard on him during training.
Post-Transformation
Sensing their despair, Doma offered a chance to him and turned both Gyutaro and Daki into demons.
Tengen Uzui
Even though he is large and muscular, and uses that to his advantage, his fighting style relies more on aesthetics and flashiness. He is the fastest Hashira, and the second physically strongest.
1) Tengen Uzui
Without a doubt, the flamboyant Tengen Uzui is physically the fastest Hashira in the Demon Slayer Corps. His sound breathing technique is a derivative of thunder breathing, one of the quickest breathing styles. He was fast enough to keep up with Daki without any difficulty.
1) Gyomei. Gyomei Himejima is the strongest Hashira in Demon Slayer. This fact has been established in the manga as Tanjiro, Inosuke and Zenitsu all agree that he is the strongest member of the Demon Slayer Corps. His strength was showcased during the fight against Kokushibo.
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.
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.
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.
Although they both share the positions of Pillars in the Demon Slayer Corps, Giyu is much stronger than Obanai.
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.
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.
4) Obanai Iguro
During the fight, Muzan blinded the Snake Hashira, who continued to injure Muzan despite this handicap. But the valiant young man succumbed to his injuries and died eventually.
He trained his mind and body with the hope that one day he could eradicate all demons. Gyomei is extremely emotional and caring and is always concerned for those around him. This could be the main reason why he is always crying in the Demon Slayer series.
Who is Jigoro Kuwajima? Jigoro was a former Hashira who practiced Thunder Breathing, which ended up giving him the title of "Roaring Hashira". Naturally, he was a very powerful demon slayer who successfully killed many demons.