Sure. One could be the story of the haunted forest fairy. In this tale, a young girl gets lost in a forest that is said to be haunted by an evil fairy. The trees seem to whisper warnings, and strange shadows lurk everywhere.
Another reason is that they have been passed down through generations. There is a sense of tradition associated with them. Families share these stories, and as they are shared, they gain more popularity. Also, the vivid and often dark imagery in scary fairy stories, such as the dark forest in 'Little Red Riding Hood', appeals to our imagination.
One aspect that can make a tooth fairy story scary is the deviation from the expected. We usually think of the tooth fairy as a kind, benevolent being. But if it's presented as a cruel, self - serving entity that doesn't care about the child's well - being, it becomes scary. For instance, if the tooth fairy takes the tooth and then curses the child with bad luck or nightmares. Also, the setting in which the encounter with the tooth fairy takes place can add to the scariness. A dark, cold room with strange noises in the background can make the whole experience much more frightening.
Once upon a time, there was a little girl who lost her tooth. She put it under her pillow as usual, waiting for the tooth fairy. But that night, instead of a gentle fairy, a shadowy figure emerged. It had long, sharp claws and eyes that glowed red. It snatched the tooth and hissed, 'You belong to me now!' Then it disappeared into the darkness, leaving the girl terrified.
Once upon a time, a little girl lost her tooth. She put it under her pillow as usual, waiting for the tooth fairy. But that night, instead of a gentle fairy, a dark shadowy figure emerged. It had sharp claws and a menacing grin. It grabbed the tooth and left a scratch on the girl's cheek. The girl woke up in horror, and from that day on, she was terrified of losing teeth.
Yes, there could be. For example, the idea of Cinderella being mistreated by her step - mother and sisters can be a bit scary. She is made to do all the hard work and is treated like a servant. Also, the time limit she has at the ball, with the threat of being discovered, adds an element of suspense which can be considered a bit scary.
The Pied Piper of Hamelin is also a bit scary. The piper is hired to get rid of the rats in the town. But when the townspeople don't pay him, he lures away all the children with his pipe. The mystery and the loss of the children make it a somewhat frightening story.
There was a boy who heard strange noises every time he was about to lose a tooth. One night, as he lay in bed with his loose tooth, he saw a figure at the window. It was the tooth fairy, but not the kind one from the stories. This tooth fairy had a tattered dress and eyes that glowed red. It flew in and grabbed his tooth so roughly that it hurt. The boy was haunted by this scary encounter for a long time.
Threats to the main characters are also a big factor. In 'Beauty and the Beast', at first, the Beast is seen as a scary presence. He's large, has a fearsome appearance, and Belle is in his castle against her will. There's the threat that he might harm her, which makes the story a bit scary in the beginning. Also, the idea of being trapped in an enchanted place is scary in general.
I think the betrayal aspect in some of the stories is terrifying. There are fairies who seem friendly at first but then turn on the human characters. For instance, a fairy might offer to help a lost traveler but then lead them into a dangerous trap instead. It makes you question who can be trusted in these fairy - filled worlds.