One characteristic could be that he has a more modern personality. In fanfiction, writers might give him contemporary values or speech patterns.
In fanfiction, Merlin might have enhanced powers. Since fan writers have creative freedom, they could make his magic more powerful or give him new abilities that he didn't have in the original stories. Also, his relationships could be different. For example, he could have a romantic relationship with a character that was not part of his story in the original lore.
It could mean that Merlin is regarded as part of the fan - created fictional works. Maybe there are certain fanfiction universes where Merlin is a character within the stories written by fans, rather than just the traditional Merlin from the original legends or mainstream media.
If Merlin died in the fanfiction, it could trigger a series of tragic events. The balance of power could tip, and the villains might seize the opportunity to attack. It could also bring out hidden strengths in the remaining characters as they try to cope with the loss.
In fanfiction, a strong Merlin might be physically powerful. He could have enhanced magical abilities that allow him to defeat powerful enemies with ease. For example, he might be able to cast spells that no one else can.
One characteristic is the use of comical situations. For example, Merlin getting into trouble because of his magic in a light - hearted way, like accidentally making Arthur's hair grow really long. Another is humorous dialogue. The way Merlin and the other characters interact with witty banter makes it funny.
If Merlin is a Dark Lord in fanfiction, it could be an interesting exploration of the 'nature vs. nurture' concept. Maybe he turned dark because of the constant fear of being discovered and persecuted for his magic. His actions as a Dark Lord might include taking over Camelot or exacting revenge on those who wronged him in the past. It gives a whole new perspective on his character.
In a more humorous take on the 'Merlin tied to a bed' fanfiction, it could be that Merlin has fallen ill and the overly - protective Gaius has tied him to the bed to make sure he rests. Merlin, being the active person he is, complains constantly. Arthur comes to visit and teases Merlin about finally being still for once. Meanwhile, Merlin tries to convince Arthur to let him loose, promising that he'll be fine. Eventually, Gaius relents and unties Merlin, who then immediately starts bustling around the room.
It could be for comedic effect to lighten the mood and add some fun to the story.
In Harry Potter Merlin fanfiction, a key characteristic is the exploration of different magical cultures. The formal magic education in Harry Potter's world contrasts with the more instinctual magic in Merlin's world. This can lead to some great storylines where characters learn from each other. For example, Ron could be taught by Merlin how to sense magic without a wand. Moreover, the fanfictions often play with the timelines. Since Merlin is set in a more ancient time, stories might involve time - travel or the influence of ancient magic on the modern wizarding world of Harry Potter.
The Merlin Reader might be curious. In future fanfiction, they could be constantly seeking more knowledge about Merlin, whether it's about his magic, his relationships, or his role in history. This curiosity could drive their actions and decisions throughout the story. Also, they could be somewhat of an outcast, as their obsession with Merlin might not be fully understood by others in their futuristic society.
The writing style in a great mature Merlin fanfiction is important too. It should be able to convey the more serious and complex themes without being too heavy - handed. It can use beautiful language to describe the magical elements and the emotional states of the characters. For instance, when describing Merlin's loneliness as the last of his kind, the words should make the reader truly feel his isolation.