Webon tanjiro, the demon slayer mark resembles embers of fire, tied to his sun breathing technique; On muichiro, the mark looks like the mist (or smoke) that is tied. Low clouds, distant haze (壱 (いち) ノ 型 (かた) 垂 (すい) 天 (てん) 遠 (とお) 霞 (がすみ) , ichi no kata: Webgreat power, great cruelty. Tanjiro and nezuko take a very complicated road to the mysterious swordsmith village in season 3, where all demon slaying weapons. Webdemon slayer season 3 last saw muichiro trapped within gyokko's water spell, and he was nearly giving up as he slowly ran out of air. But thanks to kotetsu's. Webin his final moments, yuichiro revealed the meaning behind the ‘mu’ in muichiro’s name — infinity — and held onto his brother’s hand as he passed away. Webin his dying moments, yuichiro revealed that the meaning of muichiro's name is infinity and told his twin to live on. Webanimated by ufotable and streaming on crunchyroll, demon slayer season 4, episode 4 reunites tanjiro and muichiro for the first time since the swordsmith village. Webmuichiro first begins telling everyone of how he could not move from the poison in his battle against gyokko, and he used breaths to slow down and delay the poison from circulating. Webmuichiro's new abilities revealed after activating the demon slayer mark. In a sudden moment, muichiro moved and saved kotetsu using the advection slash.
