Kozo Kanamori

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 Gyokko, Upper Rank Five, despite being critically injured. He also showed great worry for Muichiro Tokito, anxiously watching him battle Gyokko and becoming hysterical upon seeing the Hashira fall unconscious from the demon's poison. However, when it comes to his swords, Kozo is very passionate, almost as much as Hotaru to a certain extent. When Inosuke Hashibira purposefully chips the two blades he received from him, the swordsmith became furious and threatened to kill him for damaging his work.

Kozo is a man of short height and slim build, with neck-length black hair that spikes near the ends. His hands are covered in visible blisters and he wears a Hyottoko mask over his face, as do all residents of the Swordsmith Village. His attire consists of a long, pale shirt with a black haori, and brown pants. Unmasked, Kozo is revealed to have a long slender face, with thick teardrop-shaped eyebrows identical to his mask, narrow eyes, and a birthmark under his right eye.

Overall Abilities: Having no known physical training, Kozo does not have many notable physical abilities. However, he possesses considerable knowledge and experience in sword smithing. Above Average Endurance: Despite being slashed by Gyokko's water tendrils and sustaining several more wounds, Kozo is able to ignore them and continue moving, showing that while he is not on the level of Demon Slayers, he at least has above average physical vitality and endurance. Master Swordsmith: Due to being trusted with forging the Nichirin Sword of the Mist Hashira Muichiro Tokito, Kozo is an excellent swordsmith. However, he notes that he simply followed the guidelines made by Muichiro's previous smith Tetsuido. Nonetheless, he earned the Hashira's praise as the newly made katana was identical in fit and feel to Muichiro's old one.