Maybe it's because Nico has some complex and often dark or angsty aspects to his character in the source material. Fanfiction might explore these in extreme ways that can be disturbing to some readers.
I think it's because Nico is a character with a lot of depth. Fanfiction might delve too deep into his psyche and expose some very raw and disturbing aspects that people aren't prepared for. It could also be that the way some fanfiction writers portray his relationships, especially the more controversial ones, makes people scared to engage with it.
The plot could start with Naruto isolating himself. He would avoid his friends and stay away from the village. His friends would notice this change and try to reach out to him. But Naruto, being scared, would react badly. This would create a lot of confusion and worry among his friends. Then, as the story progresses, they would try to find out the reason behind his fear.
In episode 134 of One Piece, Luffy's interest in books attracted everyone's attention because of a special book called the "Sea Tower Stone Book" that appeared in this episode. This book could absorb the essence of humans and have the power to make humans superhuman. When Luffy was reading this book, he was attracted by the power in the book and tried to find more books to understand this power.
Luffy was interested in books because he was eager to learn more about the sea and marine life and hoped to become a great navigator. He hoped to improve his wisdom and ability to better explore the sea and the world by reading the stone book.
One possible reason could be that Naruto has had some really bad experiences that made him lose his confidence. For example, if he faced a series of powerful enemies alone and got severely beaten each time, it might make him scared of everyone. Another reason could be some kind of curse or dark magic that affects his mind, making him fear those around him.
You could try some popular fanfic websites like FanFiction.net or Archive of Our Own. They usually have a wide range of One Piece fanfics, so there's a chance you'll find this one there.
I'm not sure about this particular 'everyone watch luffy memories fanfic'. However, in a fanfic like this, it might show Luffy's memories of key battles. For example, his fight against Arlong which was very important for him to protect his friends in the village. It might also include his memories of when he first set out to sea, full of dreams and naivete.
Ming Hui was one of Zi Chuan's commanders. He was scared silly by the Asmodians 'surprise attack. As the commander of the Black Flag Army, Ming Hui was accused of being afraid of death and only cared about accumulating wealth and lying about his military achievements, causing the Black Flag Army to collapse. In the suicidal rescue operation of Stirling, Ming Hui was so frightened by the demons that he could not move normally and showed a terrifying look. Therefore, it could be said that Ming Hui was indeed scared silly.
There were a few scary novels recommended by the author. The first was " I Have a Paper Shop ", written by a wandering official. The novel contained some horror plots, such as the clatter of high heels outside the door, the cry of a baby, and the pale, bloody hand sticking out from under the bed. Other than that," Folk Strange News: Geomancy Master " was also a recommended super scary horror novel by Luo Qiaosen. These novels all had fascinating plots and suspense, suitable for readers who liked horror novels.