Well, it changes a great deal. Traditionally, Merlin's origin is somewhat mysterious but not related to Loki. If Loki is his mother in this fanfic, it might introduce elements of Norse mythology into the Arthurian legend. For example, Loki's trickster nature could be passed on to Merlin, making him even more cunning and unpredictable in his magic and interactions. It could also mean that Merlin has a connection to the Norse gods, which might lead to different plotlines like dealing with Norse threats or having allies from that pantheon.
This would be a huge shift. The traditional stories don't have any Norse influence on Merlin. But if Loki is his mother, it could add a whole new layer of complexity. His character could be more morally ambiguous like Loki. He might use his magic in more devious ways. His backstory would now involve Asgard and the Norse realm, which could lead to new adventures. For instance, he could travel to Asgard to learn more about his mother's side of the family, bringing back knowledge and powers that change the power dynamics in Camelot.
In Royal Fem Merlin fanfiction, Merlin is female, which changes the power dynamics and relationships. For example, her interactions with Arthur might have a different romantic or platonic undertone. Traditional fanfiction usually follows the male Merlin's story.
Merlin might become more confident as Harry Potter. In his past life, he was often hiding his magic, but as Harry, he can be more open in the wizarding world. So he could be more assertive in dealing with challenges.
In some fanfictions, Merlin might use his magic to change the past. For example, he could go back in time to prevent a certain event from happening that had a negative impact on Camelot. Maybe he'd stop an assassination attempt on Arthur or change the way a law was made that was unjust.
He would become more brooding. As a vampire, he'd have to deal with new emotions like the constant thirst for blood. This would make him more withdrawn from his friends in Camelot at first.
It could be a complex relationship. Loki, being his mother, might be both nurturing and mischievous towards Merlin. She could teach him all kinds of magic, both the useful and the tricky ones. Merlin would probably have a deep respect for her, but also be a bit wary of her tricks.
In the original Merlin storyline, Kilgarrah was often a mysterious and somewhat distant figure. When they are mates in fanfiction, it humanizes Kilgarrah to an extent. He becomes more involved in Merlin's day - to - day life. Their relationship becomes more central to the story. Instead of Merlin's adventures being mainly about his role in Camelot and his relationship with Arthur, now his relationship with Kilgarrah also plays a major role. This can lead to new sub - plots. For example, they might have to hide their relationship from some of the more superstitious or anti - dragon characters in Camelot, which adds a new layer of drama to the story.
Meeting his father could have made Merlin more confident. Knowing his family background and having his father's presence (even if it was just in the fanfiction) might have given him a sense of belonging. He could also become more powerful, as perhaps his father passed on some knowledge or power to him.
In Merlin elf fanfiction, Merlin's character can develop in many ways. He might become more in tune with his magical side as he interacts with the elves. Since elves are often depicted as having a deep connection to magic, Merlin could learn from them to control his powers better.
In Merlin fanfiction, fem Harry might become more in tune with the nature - based magic of Merlin's world. Since she comes from a world of more structured spells, she could start to embrace the fluid and often unpredictable magic of Camelot. This change could make her more adaptable and open - minded.
If Merlin forgets, it can create a lot of suspense. The other characters might not immediately realize what has happened, and they'll be confused by Merlin's changed behavior. This can lead to misunderstandings and tension within the group. For instance, if Merlin forgets his magical abilities, he might accidentally expose his powers in dangerous situations because he no longer has the knowledge to control them properly.