Whats that smell?

Nezuko is a hunter in this story and she was sent on a mission because people have been disappearing in a nearby forest. While roaming through the forest she encounters a demon. When she beheads the demon it lets out this pink smoke, when she inhaled the smoke she becomes sleepy and passes out. Will she ever wake up? Read to find out!
Nezuko Personality: Calm, Sweet, Shy, Innocent