Webwhen it comes to muichiro, he is tagging along with the shinazugawa brothers (sanemi and genya) and gyomei himejima to deal with the first upper moon,. Webeven when kokushibo was intoxicated from marechi blood, he defended himself from sanemi all out attack. Majority of fight was sanemi warding off kokushibo moon blades. Websanemi and gyomei fight the entire time because kokushibo is trying to kill them the entire time. If they falter for any reason, their chances of having their body separated into. Webmoon breathing 6th form sliced sanemi's entrails and could've split opened his guts if he didn't solidified his wounds by coagulating his blood with breathing techniques. Websanemi shows up and saves genya, then confronts kokushibo, displaying impressive skill and determination despite being badly wounded. Gyomei then joins the. Webthe intervention of both sanemi and gyomei gyomei witnesses the two hashira unlocking their demon slayer marks. The two coordinate flawlessly with their. Webduring the same fight, kokushibo decides to break sanemi's sword, but the wind hashira manages to protect his weapon merely by twisting it at a less vulnerable. Websanemi arrives, rescuing genya and confronting kokushibo, showing skill and determination despite severe wounds. Gyomei joins, challenging kokushibo with.