Nocnitsa is a creature who is a part of Slavic folklore. She is often described as a female demon with long hair who lives in the shadows and comes out at night to torment people. Her name comes from the word "noc" which means night in some languages.
Now, let's talk about what a demon is. A demon is a scary creature that people believe can have supernatural powers. It's like a monster that can do things that regular people can't do, like fly or make things move on their own. People have been telling stories about demons for a very long time, and they can be found in many different cultures around the world.
Nocnitsa is special because she's a demon that only comes out at night. She likes to scare people by causing nightmares and making them feel like they're being watched. Sometimes people say that they can feel her breath on their neck or hear her whispering in their ear.
In Slavic folklore, people believed that Nocnitsa would try to steal the souls of children while they were sleeping. That's a really scary thought, isn't it? But don't worry, because people also had ways to protect themselves from Nocnitsa. They might hang garlic or a cross over their bed, or tie a red ribbon around their wrist.
So, to sum up: Nocnitsa is a scary demon from Slavic folklore who likes to come out at night and scare people. She can cause nightmares and try to steal the souls of children, but people have ways to protect themselves from her.