Muzan is the progenitor of all demons. He’s the final boss. Once he died, all other demons died with him. Tanjiro could’ve become the new progenitor but he was quickly turned into human by Tamayo’s drug.
I see. So its means Yashiro is kinda different then, since he is not directly made by Muzan? Hmmm
as i remember tamayo and yashiro managed to beat their muzan cells (all demons have muzan cells so muzan can rule over them, but tamayo succeeded to break her and yashiro's connection with muzan), that's why tamayo and yashiro are free demons and can hide from muzan because they're not connected to him anymore even though they're still demons
Ohh, yeah I remember that too. Tamayo said something like that. So if yashiro is still alive as tanjirou ask him too in that last chapter then he could be the last demon standing
Until the very end, it makes me cry. Love it!! base on that last panel, seems like where getting a modern time scene. But I wonder what happens to other demons? I bet they didn't die even when Muzan died right? Hmmmmm