Weball the breathing styles are just exaggerated swordsplay. Tanjiro actually explains it pretty well in the anime while training with iguro. Obanai just really good at twisting his wrist.

Webobanai iguro's serpent breathing techniques in demon slayer are a mesmerizing spectacle. Each form of serpent breathing is depicted with vibrant. Webobanai's past trauma fueled his determination to become a powerful hashira, using his unique serpent breathing style in combat. The first form, β€œwinding serpent. Webthis is precisely what obanai iguro manages to accomplish with his unique blade. The fifth form of serpent breathing that he uses is great for both crowd control. Webbecause obanai perfected his breathing technique and kaburamaru developed the serpent breathing, his swordplay resembles the rhythms of a snake.

Webthis is precisely what obanai iguro manages to accomplish with his unique blade. The fifth form of serpent breathing that he uses is great for both crowd control. Webbecause obanai perfected his breathing technique and kaburamaru developed the serpent breathing, his swordplay resembles the rhythms of a snake.