Gyomei's Gray Flail and Axe Undoubtedly the strongest of all of the Hashira in terms of pure strength and power, Gyomei uses weapons that are also very unique. While they are still considered Nichirin blades for all intents and purposes, Gyomei's weapons are a flail and an axe.
Black is the most mysterious color of all the blades, and is held by the main character, Tanjiro. It is a rare blade and represents the sun; it also holds a theory that the demon slayers who own this sword are not to live a long life.
When Haganezuka sees Tanjiro's reddish hair, he becomes hopeful that he will get to see a bright red Nichirin sword. However, once Tanjiro unsheathes his weapon, the blade turns a dark black, to the concern of Urokodaki and the anger of Haganezuka.
When Tanjiro first got his Nichirin Sword on Demon Slayer, and it changed color to match the personality of its user like all Nichirin weapons do, many fans were surprised that Tanjiro's katana turned black.
It is possible for a swordsman to use more than one Breathing Style technique at a time, allowing the user to take advantage of the advantageous aspects of both techniques. Tanjiro Kamado, for example, can use both the Water Breathing and Sun Breathing styles simultaneously.
The black blade represents the Sun and is surrounded by prejudice and misconceptions, as historically every demon slayer who held it lived a short life. This could mean that Tanjirou is destined to break the pattern and set a new legend for black Nichirin blades in the Demon Slayer universe.
Standard Nichirin Katana: As a Demon Slayer, Yoriichi carries around a standard sized and shaped Nichirin katana that is deep black in color, but changes bright red during combat.
This color was first discovered by Yoriichi Tsugikuni when he became a Demon Slayer due to his Sun Breathing. In fact, it is a category of Yoriichi's gifted powers and abilities, which is meant to hamper the regeneration of Demons.
Tanjiro Kamado wields a black Nichirin blade, but the symbolism of such a sword is unknown. Black blades are seen as a rarity, as demon slayers who wield them are doomed to die young. No wielder of a black sword has ever become a Hashira, either.
The Nichirin sword that Mistsuri uses is a pink whip-like sword that fits perfectly with her overall appeal and style. Her sword is said to be one of the fastest because of how incredibly quick they are to the point that not even Tengen Uzui's swords could reach speeds that fast.
Nichirin swords are a signature in Demon Slayer with their fascinating color-changing nature. This color doesn't just look good; it imbues power too. Demon Slayer: Kimetsu no Yaiba shows off a slew of Nichirin katanas.
Zenitsu Agatsuma, a vital member in Tanjiro's clique, possesses the yellow sword, which connects with his Breath of the Thunder style and the explosive, unpredictable nature that defines him.
A sword with a thin blade and a needle-like tip that is lavender-blue in color. A standard sized and shaped Nichirin katana with a red flame pattern along its blade. Two massive Nichirin cleavers connected by a chain that is amber in color.
Inosuke operates with two blades that are a cool indigo-grey in color, in response to Inosuke's beastly nature. Breath of the Beast is certainly appropriate for Inosuke and it meshes with the sleek nature of indigo-grey.
It was Yoriichi's sword, he found it inside Yoriichi Type Zero doll when he destroy the head. And then hotaru took the sword to fix it. Tanjiro also use Kyojuro's tsuba in this sword. He found the sword on Volume 12.
The engravings on Shinobu's sword reads "evil demon" (悪鬼, akki) on the right side of the blade, and "destroy/kill" (滅殺, messatsu) on the left side of the blade.
What does Shinobu's sword say? The blade is lavender-blue in color, with the words Evil Demon ( 惡 あっ 鬼 き , Akki?) engraved on the right face, while the words Destruction ( 滅 めっ 殺 さつ , Messatsu?) are engraved on the left face due her sword's structure.
The only thing he's weak to is the sun. That is why he turned other humans into demons and spread his blood so that one of them might find a solution against the sunlight, so he can become truly perfect.
Demon Curse: Muzan places a curse on all demons that have assimilated his blood. If any demon divulges his last name "Kibutsuji" out loud, the curse activates, which causes their bodies to stop regenerating and allowing Muzan's cells inside the demon to take over and kill them, regardless of their original intent.
Muzan quickly fled the scene, barely still alive, and developed a loathsome fear of the Breath Style Progenitor, prompting him to systematically murder all of the other Sun Breathing users to prevent anyone else like Yoriichi from emerging.
Tanjiro certainly did a lot of good with his Water Breathing techniques, but his ability to use Sun Breathing both gives him an edge in battle and allows him to stand out among the incredibly powerful Hashira he fights alongside.
Nichirin Sword (Zenitsu Agatsuma) "Demon Slayer:Kimetsu no Yaiba", Bandai Spirits Proplica.
As Tanjiro pushed past the threshold of pain during this fight, he almost managed to kill Daki. The fuming rage that Tanjiro felt from seeing Daki destroy human lives helped him push past his limits while also making him bleed through his eyes in anger, resulting in his eye colors changing to bloodshot red.