Well, a plot twist could be that they get together but then find out they are from different time periods in a really convoluted way. Maybe Natsu is from the future and his presence in the present is messing up the timeline. Or, there could be a magic spell that was cast long ago that only activates when they get together, and it sends them on a wild adventure to break the spell. Another idea is that when they finally get together, they realize they have to sacrifice their relationship to save their friends, creating a really heart - wrenching situation.
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.
Well, one possible plot could be that after many adventures together, Natsu finally realizes his deep love for Lucy. He might plan a big, romantic proposal during one of their guild parties. Then the wedding could be a grand affair with all their Fairy Tail friends in attendance. They could exchange heartfelt vows, and the whole guild could celebrate their union with lots of food, music and magic.
One possible plot twist could be that Lucy doesn't immediately master the Aquarius power. Instead, it starts to have a negative impact on her at first. For example, it might make her lose control of her other magic abilities. Another plot twist could be that the source of the Aquarius power is somehow corrupted, and Lucy has to find a way to purify it while still being able to use it. Or perhaps there's a hidden side to the Aquarius power that only reveals itself in a moment of extreme danger, like it gives her the ability to communicate with an ancient and powerful water spirit that she has to convince to help her save her friends.
One possible plot twist could be that an old enemy resurfaces on their wedding day, threatening to disrupt the ceremony. Maybe a dark guild that Laxus once fought against comes back for revenge. Another twist could be that Lucy discovers a hidden family secret that might change her relationship with Laxus. For example, her family has some sort of connection to Laxus' past that she was unaware of. And a third plot twist could be that a magic spell goes wrong during the wedding, causing everyone to swap personalities for a while, which would lead to some really interesting and comical situations.
One possible plot twist could be that they face opposition from their respective guilds at first. Maybe Fairy Tail has some old grudges against Kagura's guild, and they try to stop Natsu from marrying her. But as the story unfolds, they come to understand her true nature through Natsu's love for her.
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.
Well, a plot twist might be that they got secretly married because they made a drunken bet. One night, after a wild celebration at the guild, they made a bet that if Natsu could complete a really difficult mission on his own within a week, Lucy would marry him. Natsu, being overconfident, accepted. He completed the mission, and Lucy, being a person of her word, went through with the marriage in secret, not knowing how to break the news to their friends and guild mates.
One possible plot twist could be that George is initially hesitant because he feels like he's living in his twin Fred's shadow, even in matters of the heart. He might worry that Angelina is only interested in him because he's Fred's brother. Another plot twist could be that Angelina has a secret admirer who tries to break them apart when they start getting closer. Maybe this admirer spreads false rumors about George to make Angelina doubt him.
Perhaps a plot twist could be that Lucy discovers she's pregnant but Natsu has lost his memory. He doesn't remember their relationship and is confused by the news. This would create a lot of emotional turmoil for Lucy as she tries to make Natsu remember while also dealing with the physical and mental changes of pregnancy.
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 interesting plot twist could be that on their wedding day, an old enemy resurfaces and tries to stop the ceremony. Maybe this enemy has a long - held grudge against either Lucy or Rogue. Another twist could be that one of them suddenly loses their magic powers right before the wedding, which causes a great deal of internal conflict and worry about whether they are still worthy of being together. Or perhaps a mysterious prophecy is revealed that says their union will bring either great good or great harm to the magical world, making them question if they should go through with it.