Webhaganezuka is featured prominently in this arc, even having his true face revealed during the attack on the village by two upper rank demons. He proved instrumental in. Webhotaru haganezuka (鋼鐵 (はがね) 塚 (づか) 螢 (ほたる) , haganezuka hotaru?) is a supporting character of demon slayer: He is a swordsmith affiliated. Webafter surviving his first encounter with yorichi, muzan was so scarred from his encounter with a sun breather that he went on a crusade to kill anyone that is seen wearing. Webjust as tokito and tanjiro are about to look for kanamori and haganezuka to check on their new swords, they encounter hantengu. Acting quickly, tokito uses mist. Webshinjuro reveals some interesting details about a sword breathing technique we hadn't heard of before: Here's what we found out and how it relates. Websun breathing is one of the rarest and oldest forms of breathing techniques used by demon slayers, which gave birth to all the other breathing techniques used by. Webtwo powerful horizontal slashes that can be used for both attack and defense. Of all the breathing techniques in demon slayer, sun breathing is one of the. Webkozo, haganezuka's apprentice, tries to protect his mentor, but gyokko manages to land several slashes on the swordsmith.