Kozo Kanamori VS Hisa
Kozo Kanamori
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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Hisa
Hisa (ひさ Hisa?) is an old lady who welcomes Demon Slayers to rest in her house. Tanjiro Kamado and his group visit her after they fight Kyogai at the Drum House. Hisa is a short, old lady with wrinkled skin and thick eyebrows. Her bulky, gray hair is tied into a medium sized bun with two strands poking out behind her ears. In most of her appearances, Hisa is seen wearing a plain maroon kimono with a purple sash with black zōri and white tabi socks. Not much is known about Hisa's personality, but she comes off as a very kind and welcoming person, bringing in the injured Demon Slayers without hesitation and providing multiple commodities. Despite Inosuke Hashibira's and Zenitsu Agatsuma impolite nature, Hisa is very patient with them and doesn't appear to be affected by their remarks. Hisa's family was once saved by the Demon Slayers. They started managing a free rest house for them as a token of gratitude for their work.