A common plotline is the rescue mission. His friends from Fairy Tail band together to find and save him. Another is Natsu trying to break free on his own. He might use his fire magic in creative ways to escape his bonds.
Often, the kidnapper has some sort of ulterior motive. It could be to gain power by using Natsu's abilities, or it could be revenge against Natsu or Fairy Tail. And in some fanfictions, Natsu's kidnapping reveals secrets about his past that he or his friends were unaware of.
Some fanfictions also focus on the relationship dynamics. For example, how Lucy reacts when she hears Natsu is kidnapped. Does she become more determined than ever to save him? And how does Happy, Natsu's closest companion, cope with the situation? These relationship - based plotlines add depth to the overall story of Natsu's kidnapping.
One possible fanfiction could be 'The Abduction of Natsu' where a dark wizard kidnaps Natsu to use his power. Another might be 'Natsu's Captivity' which focuses on how his friends try to rescue him. There could also be a story like 'Kidnapped: Natsu's Ordeal' that delves into Natsu's own struggle while being held captive.
A theme that is quite prevalent is the idea of sacrifice. In many fanfictions, either Natsu or Lucy is put in a position where they have to sacrifice something for the other. It could be their own safety, their magic, or their dreams. Also, the theme of growth is common. They both grow as characters, learning more about themselves and each other as the story progresses. This growth can be in terms of their magical abilities, but also in their emotional maturity.
Well, a common theme might be the idea of the underdog. Harry was an underdog in the wizarding world at first, and Natsu is also someone who has to fight hard against strong opponents. In these fanfictions, this theme could be explored more deeply. Also, the concept of family could be a theme. Natsu has his own idea of family within Fairy Tail, and Harry has his friends as a sort of surrogate family. The fanfiction could blend these two ideas together.
A common plotline is that a main character like Kagome is kidnapped by a powerful demon and Inuyasha is the only one who can save her. He has to use his strength and the power of his sword. Another is when Inuyasha accidentally kidnaps someone due to a spell or misinformation.
Well, I'm not sure how widespread it is, but it's possible to find such fanfiction. Writers often like to mash - up different universes to create something new. In a 'Harry Potter is Natsu Dragneel' fanfic, you might expect to see Harry with Natsu's determination and love for his friends translated into the context of the wizarding world. Maybe he'd be more brash and use his 'fire - like' magic in a more aggressive way like Natsu does.
Well, often in 'Harry Kidnapped' fanfiction, the plot could revolve around Harry being kidnapped for his prophetic powers. If the story is set during the time when he was still a student at Hogwarts, it might involve his friends trying to rescue him. There could be a lot of mystery and danger involved, like the kidnappers leaving cryptic clues or having some sort of elaborate plan to use Harry's magic for their own evil purposes. Also, some stories might explore how Harry copes with being kidnapped, whether he tries to escape on his own or waits for help, and how this experience changes him as a character.
One common plotline could be the characters' efforts to rescue the kidnapped person. For example, Carly and her friends might use their wits and resources to track down the kidnapper. Another could be the emotional turmoil of the victim and their friends during the ordeal. The fanfiction might also explore how the iCarly crew deals with the media attention that comes with such a serious situation.
Sometimes, the fanfiction might involve a mystery aspect. Why was Webby kidnapped? It could be related to some hidden treasure or a power that she unknowingly has. Unraveling this mystery becomes a big part of the story as the characters try to find and save her.
Sometimes, Jack is kidnapped by supernatural beings. These could be ghosts or ancient sea creatures. They have their own motives, like using Jack as a sacrifice or a key to unlock some ancient power. Jack then has to use his knowledge of the supernatural world, which he has gained from his many adventures, to free himself.
A common plotline is the rescue mission. Her friends and family band together to find Betty. Another is the discovery of the kidnapper's identity. It might be someone from her past or a new enemy in town.