As Demon Slayer: Kimetsu no Yaiba's character Nezuko was turned into a demon by the evil Muzan she needs to hide from the sun to survive. Nezuko would burn the same as any other demon. With demon powers, Nezuko also changes her body's shape at will, so she hides in the daytime in a box that Tanjiro carries around on his hunt for Muzan. Changing size skills also helped her when Kano was ordered to hunt down Nezuko, but he couldn't land a hit on her. A fanart Demon Slayer: Kimetsu no Yaiba progress bar for YouTube with angry Nezuko.