Of course, the one who takes the top spot in terms of the best swords in Demon Slayer is Tanjiro's black Nichirin blade. Although Tanjiro started out as a Water Breathing user, his Nichirin sword turned black instead of blue, and that surprised him because black swords are said to indicate bad luck.
The strongest and rarest nichirin sword is the black nichirin blade which belongs to the protagonist, Tanjiro Kamado. This ultra rare sword only appears twice in the anime with the second wielder being Kyojuro Rengoku, the former flame hashira.
As the battle reached its climax, Tanjiro was able to knock the doll's head off and discovered that the mechanical body contained a mysterious sword. Fans of the manga will recognize this sword as the one carried by Yoriichi Tsugikuni himself.
Tanjiro Kamado wields a black Nichirin blade, but the symbolism of such a sword was initially 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.
Being one of the strongest Hashira, Sanemi's sword matches his appearance. His sword is very durable and lasts throughout the series. It had no problem piercing through the box that Nezuko is held in. He fought against Kokushibo during the final arc of the manga.
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.
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.
Talking about the ways to activate the bright red color of the sword, we all know Tanjiro has activated his Demon Slayer Mark, but this time, it was Nezuko's Blood Demon Art that helped him get access to the sword's remarkable ability. Yes, that's right; Nezuko has the ability to awaken a Bright Red Nichirin Sword.
Demon Slayer: All about the 300-year-old sword that nearly beheaded the Demon King in the Sengoku Era. The sword fitted into Yoriichi Type Zero belonged to the legendary swordsman Yoriichi Tsukiguni from the Sengoku era. He was a genius when it came to swordsmanship and nearly killed Kibutsuji Muzan all by himself.
Enhanced Strength: After training in the mountains, his increased strength apparently exceeded that of even Tanjiro. Master Swordsmith: Hotaru is a skilled swordsmith, able to forge Nichirin Swords and repair it multiple times each time it broke in battles against demons.
Nichirin Come in Many Colors, but Black is Strongest
Blades associated with Water Breathing typically change to a blue color, for example, while that of a user of the Flame Breathing technique would turn red.
Nichirin blades can only be forged from scarlet crimson ore and scarlet crimson iron sand, two rare minerals that can only be found in mountains with incredibly high altitudes that allow them to be consistently bathed in light year-round.
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.
The Wind Hashira has one of the saddest backstories in Demon Slayer. His mother had turned into a demon and had killed five of his siblings. He was forced to kill his own mother in an attempt to save his only remaining brother, Genya.
7 The Love Hashira - Mitsuri Kanroji
Kanroji first joined the Demon Slayer Corps not to improve on her own fighting abilities, but to find a suitable husband, as she believes her husband must be stronger than she is.
Before Gyomei Himejima was a Demon Slayer Hashira, he lived in a temple raising nine orphan children, and he has been blind since birth. After an invading demon killed all but one of the children, Gyomei Himejima beat the demon with his bare fists until sunrise.
Muichiro Tokito's White Sword
Much like Tomioka, Mist Hashira Muichiro Tokito has a simple but powerful sword that gets the job done. Tokito wields a white blade with the words “Destroyer of Demons” engraved on it, like all other Hashiras.
Gyomei Himejima: The Blind Stone Hashira with Unmatched Strength. Among the Hashira, Gyomei Himejima stands out as the Stone Hashira, with unmatched raw physical strength. Despite being blind, he maximizes his concentration through painful memories, making him a formidable fighter.
Green Nichirin Blade
The Breathing that inspired many other techniques is represented by the green sword color. Wind is the element of the green Nichirin blade and Sanemi Shinazugawa is the one who wields it in Demon Slayer.
Tanjiro is a prime example as he only became a Demon Slayer and got his black Nichirin after a demon Human Slayer-ed most of his family.
Nichirin swords are unique to the swordsman and are known as color-changing swords because the blade's exterior will change to reflect its user; however, a black nichirin sword is said to be bad luck -- and only two known users in Demon Slayer have weilded one.