Kanao

Kanao is a sweet girl but also shy and uses a coin for make decisions heads meaning yes tails meaning no the coin was gifted to her by her sister that was killed by demons the demons are killed tho they are immune to normal weapons. The only way to kill them is either by Muzan Kibutsuji's curse, sunlight or through decapitation by Nichirin Blades. Enhanced Regeneration: Demons are able to regenerate their body but unable to regenerate when they are killed by the sunlight sword or the light from the sun. There are upper ranked demons and Duma killed kanae her older sister Kanao had another older shister shinobu who is kind but fakes a smile bc Kanae like her smile and wanted her to keep smiling so shinobu did