Webbefore the demon slayers can ever hope to defeat muzan kibutsuji, they have to defeat the 6 upper moons. But who are these powerful demons? Webalthough daki is the first to be introduced in the ‘entertainment district’ arc, gyutaro is acknowledged as the true upper rank 6 demon by muzan himself. Webeven in final arc, upper demon six will be replaced (not adding details for spoiler reason). So, why are upper moon demon replaced if one of the member dies?. Webi am sure it is simple for muzan to create an upper moon. He has control of every demon with his blood. Demons fear him as he could destroy them with just them saying his name. Webhe eventually decides to join muzan as a demon in order to forever practice swordsmanship without having to worry about contracting an illness or growing old out of. Webhere are all the twelve demon moons ranked from weakest to strongest. This article will discuss events from season 1, season 2, and the. Demon slayer kimetsu no yaiba. The most powerful of the 12 kizuki in demon slayer anime. Webmuzan vs upper moons (hypothetical matchup) manga discussion. Looking back at the current chapters (189) we see that the pillars are able to keep up with muzans attacks especially gyomei, sanemi, obanai and giyu.