if the third was almost impossible to kill... what about the 2nd and 1st? muzan really has a way to keep them alive or something? but the 5th died so easily....
That's so sad, his actual wishes and mind were twisted so much to make him become the very thing he hated. Someone who abused their power over those who can't fight back...
Man, the 3rd still could've regenerated after taking on Tanjirou and Giyuu ... the 2nd didn't seem to have any humanity/empathy in him and 1st is no joke. It'll be tough for whoever's facing them.
@Claresilver47
You're right. He had forgotten what was truly important to him and why he seeks strength. And Muzan was still there trying to control him.