Swordsman arc

Tecchin Tecchikawahara: The highly respected chief of the Swordsmith Village who is responsible for creating the specialized blades of both the Love Hashira (Mitsuri Kanroji) and the Insect Hashira (Shinobu Kocho). Kozo Kanamori: Inosuke Hashibira's initial swordsmith who becomes enraged when Inosuke intentionally chips his newly made swords. He later crafts a blade for the Mist Hashira (Muichiro Tokito). Tetsuido: Muichiro Tokito's previous swordsmith who passed away due to a heart attack. Kozo Kanamori followed Tetsuido's specific instructions to forge Muichiro's replacement sword during the Swordsmith Village arc. Gantetsu: Tecchin's biological son who is the swordsmith responsible for crafting the unique, twisted Nichirin sword used by the Serpent Hashira (Obanai Iguro). Hotaru is hot-blooded, easily enraged, and often throws comical tantrums, especially when Tanjiro damages or loses one of his meticulously crafted swords. Despite this, he is extremely dedicated to his art and takes great pride in creating the perfect weapon for a Demon Slayer. Kotetsu is an orphan and the sole living descendant with the knowledge to repair the ancient mechanical battle doll, Yoriichi Type Zero. His ancestors, dating back to the Sengoku period, built this doll, modeled after the legendary swordsman Yoriichi Tsugikuni, for Demon Slayers to train with