Hitodama is a word from Japan that means "human soul ball." It refers to a kind of ghost that people used to believe in.
The Japanese used to think that when a person died, their soul would leave their body and travel to the afterlife. But sometimes, the soul would get lost or confused and wouldn't know where to go.
That's where hitodama comes in. People believed that sometimes a person's soul would appear as a little ball of light that would float around. They thought that if you saw one of these balls of light, it meant that someone's soul was lost and needed help finding its way.
But here's the thing: hitodama weren't just any old ghost. They were special because they were made of a person's soul, so they were sort of like a part of that person that had broken off. This made them very powerful, and people were afraid of them.
In fact, some people believed that if you saw a hitodama, it meant that you were going to die soon! They thought that the little ball of light was a warning sign, telling you that Death was coming for you.
So while hitodama might seem like a pretty, harmless little ghost, they were actually pretty scary to the people who believed in them.