First, create interesting characters. Decide who the kidnapper is, their motives, and the personality of the kidnapped character. For example, the kidnapper could be a misunderstood noble who needs to marry to keep his title. Then, set the scene well. Describe the place where the kidnapping happens vividly.
Well, in such fanfiction, usually there is a strong sense of conflict. The kidnapped part creates immediate danger and high - stakes for the character. The forced - to - marry aspect often involves power dynamics. Maybe one character is from a powerful family or group that forces another into marriage, which can lead to a lot of emotional turmoil for the kidnapped character, like fear, anger, and a sense of helplessness.
It could be someone from a rival village. Maybe as part of a peace treaty, Naruto is forced to marry a kunoichi from a village that was once at war with Konoha. This would create a lot of tension and interesting storylines as Naruto has to deal with the cultural differences and the past hostilities between the two villages.
It could be a character from another important ninja clan, like Hinata perhaps. Since Hinata has always had feelings for Naruto and her clan is also a significant part of the village, Minato might see it as a good match.
One reason could be some sort of ancient magical law or prophecy. Maybe there's a hidden clause that says for the greater good of the wizarding world, they need to be married. It could be related to some power or protection that their union might bring.
There are indeed such fanfictions. Some explore really interesting concepts within this odd scenario. For example, in some stories, the forced marriage is a part of a dark plot by Voldemort to gain more power over the wizarding world through Harry. Others might focus on how Harry copes with this situation and tries to find a way out while also dealing with his complex feelings towards Voldemort. It's a very unique concept that can lead to some very creative storytelling.
One common theme is the struggle for acceptance. The human character usually has to accept the fact that they are married to a dragon, which is a very different being. For example, in many stories, the human initially resists but then learns to see the dragon as more than just a fearsome creature.
Well, it could lead to a whole lot of drama. Percy might resist at first, causing conflict within the fanfiction world. Maybe he has feelings for someone else, and this forced marriage would create a love triangle situation.
Yes, there are some fanfictions with this rather strange premise. You can often find them on various fanfiction websites like Archive of Our Own (AO3). Just search for the relevant tags.
One reason could be for the sake of exploring different relationship dynamics. Fans want to see how Harry would react in a situation that is completely out of his control, like a forced marriage. It adds a new layer of drama to his character.