Well, a really interesting plot twist could be related to their magical bond. Maybe there's a situation where Merlin's magic starts to change because of his closeness to Kilgarrah. It could be something like his magic taking on some of Kilgarrah's dragon - like qualities, like the ability to sense things from a great distance or a new kind of fire - based magic. And then, they have to figure out how to control this new aspect of Merlin's magic together. Also, there could be a plot twist where the other characters in the Merlin universe start to suspect their special relationship and react in different ways, some with acceptance and others with fear or jealousy.
One popular plot twist could be that Kilgarrah, despite his ancient and somewhat aloof nature, reveals a vulnerability only Merlin can understand. This changes their relationship from a typical mentor - protege one to a more equal and emotional bond. Another might be that they have to face a common enemy that forces them to rely on their new - found'mateship' in a way they hadn't expected. For example, a powerful dark magic user who targets both of them specifically because of their unique connection.
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.
One popular plot twist is Merlin being a double agent. She seems to be on the side of the good guys in Fairy Tail, but in the fanfiction, she could be secretly working for a greater evil. This completely changes the perception of her character.
One popular plot twist is Merlin's true origin. In some fanfictions, it is revealed that she has a much deeper connection to the world's magic or a certain ancient power than initially thought.
In Merlin gives birth fanfiction, a plot twist could be that the birth is not a normal physical one. Instead, Merlin creates the baby out of pure magic, which is unheard of in the magical world. This causes a stir among the magical community, some seeing it as a miracle and others as a threat. Another twist might be that the baby has a connection to a different realm, and its birth starts to open portals between worlds. And then there's the twist where Merlin gives birth to twins, but one has light magic and the other has dark magic, setting up an internal struggle within Merlin on how to raise them.
A really cool plot twist in some 'Harry Potter and Morgana Merlin fanfiction' is the idea that Morgana was actually an experiment by an ancient wizard in the Harry Potter world long ago. So her presence in the Merlin universe was a sort of exile. When she returns to the Harry Potter world, she has a different perspective and new powers. Another interesting twist is that the sorting hat in Hogwarts is actually an artifact from Merlin's time, and it has a hidden connection to Morgana. This connection is revealed when a new student arrives who has a special link to both universes, and it sets off a chain of events that no one could have predicted.
One popular theme is loyalty. Merlin's unwavering loyalty to Arthur is often explored in a more romantic or deeply bonded way in fanfiction. Another theme is the power dynamic between them, like how Merlin's magic can both protect and complicate their relationship. Also, the idea of destiny plays a big role. Since they are so intertwined in the Arthurian legend, fanfiction might explore how their being mates is fated and how they fulfill their destinies together.
Well, a really interesting plot twist might be that when Merlin travels back in time, he discovers that the future he thought he knew was all wrong. Maybe the events that led to Arthur's rise and fall were actually set in motion by a time - traveling sorcerer from even further in the future. He could also find that the people he thought were his allies in the past were actually working against him all along, which would completely change his view of history and his role in it.
One possible plot twist could be that Bella discovers Caius has a hidden agenda all along, and it's not just about their relationship. Maybe he's using their bond to gain power within the vampire world. Another twist might be that Bella has a secret power that is awakened by her connection with Caius, and this power changes the dynamics of their relationship and the entire vampire community.
In some 'bella and james mates fanfiction', a plot twist could be that James is actually under a spell that makes him seem evil, and when the spell is broken, he and Bella can truly explore their mate bond. This completely changes the dynamic from the original story.
One popular plot twist could be the main character, reborn as Ben, discovers that the Omnitrix has a hidden mode. This completely changes the power dynamics and the challenges they face. Another could be that the villains in the Ben 10 universe are actually being controlled by an even greater evil that was previously unknown. And a third might be that Ben's human identity has some sort of special connection to an alien race that was thought to be extinct.