In the case of abandoned dolls, the scariest part is the unknown. We don't know their history, who owned them, or what might have happened to them. The dilapidated state they are often found in, like with missing parts and faded colors, gives the impression that something bad has happened to them, and that they might carry some sort of negative energy, which is a very spooky thought.
For Robert the doll, the fact that it seemed to have a mind of its own and would move around on its own is really scary. And the reports of people hearing giggles when no one else was around, especially when it was associated with a child's toy, is very unsettling. It makes you wonder what kind of 'entity' could be inside the doll.
The unexplained scratches and noises that occurred around the doll are really scary. It gives the impression that there is some unseen and malevolent force at work. Also, the fact that people who interacted with the doll reported feeling a sense of extreme dread and unease. It's like the doll had a power to make people feel uncomfortable in their own homes.
The scariest part is when the doll moves on its own. Just seeing it shift positions without any visible force is really creepy.
The scariest part is often when the doll moves on its own. For example, if it's seen in a different position from where it was left, it gives a sense of something unnatural and spooky.
Perhaps the scariest aspect is the psychological impact it has on the people in the story. For example, the feeling of being watched by the doll all the time, and the paranoia that builds up as strange things keep happening. The characters in the story start to question their own sanity, which is a very scary thought. In addition, if the doll has some sort of connection to a dark past or an evil entity, that also adds to the scariness. It's like there's an unseen and malevolent force lurking behind the seemingly innocent - looking doll.
For me, the scariest parts are the nightmares she causes. The thought of being chased by a living doll in your dreams is truly terrifying. Also, the mystery around her origin, that she was made by a witch and has dark magic in her, makes it all the more spine - chilling.
Probably the idea that the doll might be possessed. Just thinking about an inanimate object having some sort of evil entity inside it is really creepy.
The sudden movement of the doll can be the scariest part. Like when it moves its eyes or changes its position without any visible force.
The scariest part is probably the idea that an inanimate object like a doll can seem to have a life of its own. Just thinking about it moving around on its own is terrifying.
In a particular real - life story, a collector of dolls bought a very rare and old doll. As soon as he brought it home, he started having nightmares. In his dreams, the doll was chasing him and trying to harm him. He noticed that the doll's expression seemed to change over time, becoming more menacing. He tried to sell the doll, but no one wanted it because they could also sense something off about it. Eventually, he had to contact an expert in haunted items to deal with the doll.
In an Emily horror story, the moment when Emily realizes she's completely alone and there's no one to help her can be really terrifying. Like when she was in the forest camping and all she had was her tent against whatever was out there with the glowing eyes. She knew she couldn't just run to safety easily.