Pishacha is a make-believe creature from Hindu mythology. It is thought to be a demon or spirit that feeds on human energy and blood. It is said to be very scary and usually comes out at night to scare people.
Think of it like a scary monster that only comes out when it's dark. It likes to scare people and make them feel afraid. In Hindu mythology, they believe that if you don't treat other people well, the Pishacha might come after you. It's important to be kind to others because this scary creature might be watching, waiting to pounce.