Yes, there are likely to be such fanfictions. In the Naruto series, Sakura can be quite assertive and strong - willed. Her temper and skills could potentially be a source of intimidation for Naruto in the creative interpretations of fanfiction writers.
Yes, sometimes Hulk is scared of Thanos. Thanos is a very powerful and intimidating villain, and even the mighty Hulk can feel intimidated by him in certain situations.
I can't say I'm scared. They might have suspenseful moments, but that doesn't mean they scare me. It depends on the way the stories are presented and my mood at the time.
Well, in some fanfictions, Bella might be scared of Edward because of his vampiric nature. His superhuman strength and speed could be intimidating. Also, the unpredictability of his actions as a vampire who is constantly fighting his bloodlust could make Bella feel scared.
There are several reasons why boys may be scared from a story. One reason is that they may have a vivid imagination, and the story might trigger it in a negative way. For instance, if a story involves a child being chased by a malevolent force, the boy might imagine himself in that situation. Moreover, if the story has a lot of suspense and sudden scares, it can be overwhelming for some boys. Additionally, if they have had prior experiences that relate to the scary elements in the story, it can heighten their fear. For example, if a boy has had a bad experience with dogs and then reads a story about a rabid dog attacking people, he is likely to be more scared.