One possible plot twist could be that Natsu, as a dragon, has a hidden past connection to the royal family that Lucy belongs to. Maybe he was once a protector of the kingdom in his dragon form long ago. Another could be that Lucy, the princess, discovers she has some sort of magic power that can communicate with dragons, which is a big secret in the story. And a third plot twist might be that an evil force tries to use Natsu's dragon form against the kingdom, and Lucy has to find a way to break the spell or control over him to save both Natsu and her kingdom.
Well, in this type of fanfiction, a great plot twist could be related to a prophecy. Suppose there's an old prophecy that says a dragon and a princess will either save or destroy the world. Natsu and Lucy initially think they are there to save it, but as the story unfolds, they realize that some of their actions could be misinterpreted and might lead to the destruction of the world instead. Also, it could be that Natsu's dragon nature makes him a target for other dragon - hunters in the story, and Lucy, as a princess, has to use her political power and influence to protect him. This changes the dynamic of their relationship from just a friendship or a potential romance to a more complex situation where they are relying on each other's different strengths.
Well, in many such fanfictions, it often involves Natsu and Lucy having a special connection related to dragons. Maybe Natsu's dragon powers play a role in bringing them closer in a romantic or fated - mates - like way. For example, they might go on adventures together where Natsu's dragon instincts protect Lucy in a more profound way than in the original story, and their relationship deepens as they face various challenges side by side.
One possible plot twist could be that Natsu initially doesn't believe it's his child. Maybe he has some self - doubts due to his past or his own insecurities. Another twist could be that there are external forces trying to harm Lucy because of her pregnancy, like dark guilds seeing it as a way to get to Natsu. And perhaps the pregnancy could also bring out a new side of Natsu, a more protective and responsible side that no one has seen before.
Perhaps the character is reborn with memories of a future event that threatens the Mikaelsons. This would put them in a position to either try to change the future or use it to their advantage within the family dynamics. They might face disbelief from the Mikaelsons at first, but as events start to unfold as they remembered, they gain more influence.
One possible plot twist could be that Lucy initially refuses Natsu's proposal because she fears it will change their dynamic in the guild. She might think that getting married will make them less focused on their adventures and more on domestic life.
One possible plot twist could be that they face a powerful enemy who has the ability to make them forget their feelings for each other. As they struggle to regain their memories and connection, they discover new things about themselves and their relationship. Another twist could be that there is a misunderstanding caused by a jealous third party, which leads them to briefly separate before realizing the truth and coming back together stronger. And a third plot twist might be that they are forced to choose between their relationship and a great power or responsibility that could change the fate of their world.
Another plot twist might be a time - related one. What if John gets transported back in time to the events of the Harry Potter series and meets a younger Hermione? His different perspective and knowledge from his own world could change the course of events in the wizarding world, creating a complex web of changes and consequences.
In some fanfics, a plot twist could be that Severus was actually protecting Hermione all along under Dumbledore's secret orders, and Sirius discovers this and has to re - evaluate his hatred for Severus. This completely changes the dynamic between the three.
One interesting plot twist could be that Naruto starts to have memories of Tobirama's past battles. This would make him question his own identity and purpose. Another could be that Tobirama's reincarnation in Naruto causes a shift in the power dynamics among the villages. It might make other villages see Konoha as a greater threat or as a source of new knowledge.
One of the most interesting plot twists could be that Naruto discovers a new form of chakra that has the power to rewrite history. This would completely change the power dynamics in the Naruto universe.
One interesting plot twist is that the chakra seal on Naruto is actually a key to an ancient power source. At first, it seems like a hindrance, but as the story progresses, it's revealed that the seal was placed there to protect this power until Naruto was ready. This flips the whole concept of the chakra seal from a negative to a positive in an unexpected way. Also, there could be a plot twist where the sealing of Naruto's chakra was a misdirect, and it was actually someone else's chakra that was being targeted, and Naruto was just a decoy.