In a scary dora story, the isolation and being trapped in a spooky place are really scary. For example, when Dora was locked in the haunted house and couldn't get out. She was alone with all those creepy things and didn't know what to do.
The distortion of the normal and familiar can be the scariest. In the cemetery story, seeing a figure with a skull face instead of a normal human face makes it very frightening. It takes something that we know and twists it into something terrifying.
One of the scariest aspects is the sense of malevolence it gives off. It's not just about the physical things it does like moving or causing noises. It's that feeling that there's an evil entity inside the doll, constantly watching and plotting something bad. Also, the unexplained scratches and marks that seem to be left by the doll are really spooky. It makes you wonder what kind of force could be behind such actions.
The sudden transformation of the cute and innocent - looking Barbie into something terrifying is very scary. For example, when its eyes change color or it starts to move in an unnatural way.
When something from Emily's past or the past of the place she's in comes back to haunt her. For example, if there's a dark history associated with the house she lives in and things start to happen that are related to that history. It makes you think that the past can't be escaped and that there are forces we don't understand at work. In the case of the old diary, it's like the past is reaching out through the pages to get to Emily. That's really terrifying.
It might be the sense of isolation the kids feel. When the babysitter cuts off their communication with their parents, it creates a really scary and helpless situation for the kids. They are alone with someone who is starting to act very strangely, and they have no way to get help.
The feeling of being trapped is also very scary. In a harry scary story, if Harry is in a spooky place like a locked cellar and there seems to be no way out while something menacing is approaching, it's a truly frightening situation. He has no escape and is at the mercy of whatever is there in the darkness.
As I don't know the story, I can't say what the scariest parts are.
The sudden cut - off of the call can be really scary. Just like in the story where the woman calling about an intruder had her call end abruptly. It leaves so much mystery and makes you wonder what happened to the caller right away.
The scariest part is when the statue seems to come alive, like its eyes glowing red. It gives a sense of the unnatural and the unknown, which is very frightening.
The isolation of Rapunzel is also very scary. She is alone in that tower with no one to really talk to or rely on. She has no idea what's going on in the outside world. It's like being in a prison cell but much worse because there's no end in sight to her loneliness.
The Joker's ability to manipulate situations is also quite scary. He can turn a normal day in Gotham into a living hell. He can make people turn on each other, creating chaos and destruction. For instance, he might spread false rumors that lead to riots, and all the while he's just standing there, laughing at the mayhem he's caused.