One reason could be that it doesn't have the right format recognition for fanfiction. Fanfiction can have unique formatting styles that are different from regular texts, and Merlin might not be programmed to handle those.
One possible reason is that Nevile doesn't have access to fanfiction. Maybe he doesn't know where to find it or he is in a place where access to such materials is restricted.
Well, it could be a culmination of events. Uther's growing distrust of those around him, combined with Merlin's secretive nature about his magic. Merlin might be caught in the middle of a power struggle or a plot against Uther, and Uther, in his quest to protect his throne and Camelot, decides to eliminate Merlin without fully understanding the consequences. This would also create a great deal of drama and conflict for the other characters in the story, which is something fanfiction writers often strive for.
If Merlin can read fanfiction, it means that it can access a vast array of creative ideas that fans have come up with. This might allow Merlin to see different perspectives on the original stories it's related to. For example, if there's fanfiction about Merlin's own adventures that deviate from the traditional tales, it could provide new insights. Also, it might be able to understand the evolving cultural views of the stories through the lens of fanfiction. Fanfiction often reflects the current cultural trends and the desires of the fans, so Merlin reading it could be like getting a real - time update on how the public views the characters and events it's associated with.
One reason could be to protect the person he marries. If she's a commoner, for example, the noble society in Camelot might not accept their relationship. So, they keep it a secret. Another reason could be that the person he marries has some sort of power or identity that could put them in danger if it was known. For instance, if she was a sorceress, in Camelot where magic is feared, they'd have to marry secretly.
One reason could be his sense of isolation. In many fanfictions, Merlin might feel alone as he has to keep his magic a secret from most people around him. This constant hiding and fear of discovery can lead to depression.
It could also be due to the lack of proper rest. Merlin is usually depicted as a very busy character in fanfiction. He has duties in the castle, like serving Arthur, and on top of that, he has to use his magic to help those in need secretly. With so much to do, he might not have enough time to rest, leading to exhaustion.
One reason could be to create a unique power - up for Naruto. In fanfiction, authors often want to make their versions of characters stand out. Giving Naruto the ability to summon snakes gives him an edge and a new set of skills to use in battles. It also allows for different strategic approaches compared to his regular abilities.
Fanfiction can sometimes deviate a lot from the original story. It might be that the official creators or those in charge of the Harry Potter brand don't want the characters to be misrepresented in fan - made stories, so they restrict access to it for Harry or anyone in the context of that world. Another aspect is that some fanfiction may have a negative or unethical undertone, and to protect the integrity of the original story, access is prohibited.
It could also be due to some past trauma. Perhaps Merlin has been through an experience where Arthur was involved in a way that now makes him flinch. Like, Arthur might have accidentally hurt Merlin during a battle training in the past, and now Merlin flinches whenever Arthur makes a sudden move.
One reason could be to add a new twist to the story. It makes the relationship between Merlin and Mordred more complex and emotional.