Mushi are small, supernatural creatures found in the anime and manga series Mushishi. They are often invisible to most humans and exist in various forms, resembling natural elements like plants or animals. Mushi are considered to be the most basic forms of life, and they interact with the environment in unique ways, sometimes causing mysterious phenomena. In the world of Mushishi, a Mushi Master called Ginko travels to study these creatures and help people affected by them. Each episode explores different encounters with mushi, highlighting their ethereal nature and the delicate balance between humans and the natural world.