Hotaru Haganezuka VS Kozo Kanamori

Hotaru Haganezuka (鋼鐵はがね塚づか 蛍ほたる Haganezuka Hotaru?) is a swordsmith affiliated with the Demon Slayer Corps. Hotaru wears a sunflower-patterned robe and a large, woven hat with hanging floral wind chimes. His head is wrapped in a spotted cloth and his face is concealed by a Hyottoko mask (wooden festival mask), similar to Sakonji Urokodaki. During the Swordsmith Village Arc, he is seen with a more muscular build compared to his initial appearance.[2] Unmasked, Hotaru is revealed to have long, black hair coupled with sharp eyes and distinctly-shaped thick eyebrows.[3] However upon being attacked by Upper Rank 5, Gyokko, Hotaru now possesses several deep scars and cuts from the Demon all over his body, including an X-shaped one on his face, and has now lost the use of his right eye.

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Kozo Kanamori (鉄か穴な森もり鋼こう蔵ぞう Kanamori Kōzō?) is a swordsmith affiliated with the Demon Slayer Corps. Kozo is a man of average height and build with chin-length black hair that spikes near the ends. His hands are covered in visible blisters and he wears a Hyottoko mask over his face. Kozo is usually seen wearing a long, pale robe with a black haori. Kozo appears as a gentle, soft-spoken individual. He is capable of understanding the hot-blooded Hotaru Haganezuka and cares for others very much as seen when he continues to protect Hotaru against an attack from Upper Rank 5, Gyokko, despite being critically injured.[2] However, when it comes to his swords, Kozo is very passionate. When Inosuke Hashibira purposefully chips the dual blades he received from him, the swordsmith is furious and berates him.

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