Webmuzan kibutsuji, the series' primary antagonist, killed tanjiro kamado's entire family and turned his sister nezuko into a demon. As the first demon in the world,. Webmuzan's clear goal is to conquer the sun and become immune to sunlight to escape his vulnerability. Webits slow from u to assume it's something as simple as walking in the sun, this is just a mere step toward what he wants and he finds it annoying, you see in every muzan encounter he always babble about perfection, far from death, unchanging, now let's take example rui death, muzan favored rui and gave him the ability to to form a family.
