Sure, it can be normal. Just like any person might be interested in what others write about them or their alter - ego. It's a way to connect with the fan community on a different level.
Well, it could be a way for the daredevil to see how others perceive their character. Maybe they find it interesting to see the different scenarios and relationships that fans come up with in the fanfiction.
It has had a huge impact. It set a new tone for Daredevil stories, making them darker and more intense. This influenced subsequent comic runs and the way the character was portrayed in other media like movies and TV shows.
The main character is Daredevil, a.k.a. Matt Murdock. He is central to the story as he battles crime in Hell's Kitchen. His friends Foggy and Karen play crucial roles too. Foggy provides the legal and comical sidekick aspect, while Karen often gets caught up in the dangerous world of Daredevil's vigilantism, adding a female perspective and sometimes getting into trouble that Daredevil has to save her from. And of course, there are the villains like Kingpin, who is a powerful and menacing antagonist that Daredevil has to face off against.