Often, it could be fans who are interested in exploring different aspects of the Link character. These might be female fans who want to see a different perspective on the typically male hero. They might be creative writers who like to play with gender - swapping concepts in fanfiction.
The likely authors could be Zelda enthusiasts who have a vivid imagination. They might be young writers, perhaps in their teens or twenties, who are part of the fanfiction community. They could be fans who are also into exploring different types of relationships in the Zelda world and think that turning Link into a girl can open up new relationship dynamics to write about. It could also be more experienced fanfiction writers who are looking for a new and unique angle to write from.
The Yiga Clan could be likely kidnappers. They've always been enemies of Link and would love to get their hands on him. They might see kidnapping him as a way to stop him from interfering in their plans. Another possibility is the Gerudo thieves. Although not all Gerudo are bad, there could be a group of them who think Link has something valuable and decide to take him hostage.
One common theme could be the exploration of gender roles. When Link is turned into a girl, it might lead to a re - evaluation of how his character typically behaves in the original context and how those behaviors change with the new gender. Another theme could be relationships. For example, how his friendships or potential romances are different as a girl. It could also explore self - discovery, as Link has to come to terms with this new form of himself.
Astrid is likely to be one of the main characters to interact with Hiccup. She might be initially very confused or even a bit jealous depending on how she perceives Hiccup's new form. Stoick, Hiccup's father, would also have significant interactions. He would probably be shocked at first but then try to support his child in this strange situation. And of course, Toothless. Their bond is so strong that Toothless would surely be involved, perhaps trying to understand what has happened to his rider.
Sasuke would definitely be one of the main characters to interact with Naruto. Their relationship has always been complex, and with Naruto as a girl, it could become even more so. Sakura would also interact a lot. She might be both jealous and intrigued by Naruto's new form. Kakashi too, as Naruto's mentor, would have to adjust to this change and guide 'her' in a different way perhaps.
Often, it could be fans who are really invested in the Katniss character. People who have been following the Hunger Games series closely and have a deep understanding of her character arc. They might be female fans who can relate to the idea of pregnancy and motherhood, wanting to project that onto Katniss. But it could also be male fans who are interested in exploring different aspects of the story and Katniss's relationships through this new plotline.
Obviously, Bakugo would be one of the most affected. His relationship with Izuku has always been complex, and Izuku becoming a girl would surely change the dynamic between them. He might have to re - evaluate his feelings of rivalry and superiority. All Might would also be affected. As Izuku's mentor, he would need to adjust his training methods and support system to fit Izuku's new situation as a girl.
Obviously, Harry and Ron would be highly involved. They are Hermione's closest friends. Harry would likely be the one leading the effort to find a solution, given his heroic nature. Ron, on the other hand, would probably be more involved in the day - to - day care of baby Hermione, with his big, caring heart.
There might be a jealous friend or acquaintance who feels that Stiles, as a girl, is getting too much attention. This person could then start spreading rumors or causing trouble for Stiles in an attempt to bring her down.
Perhaps a powerful sorceress. She could be jealous of Robin's connection to Batman and the other heroes, so she uses her magic to turn Robin into a girl as a way to humiliate and weaken him. The sorceress could then try to use Robin's new form to her advantage, like trying to make Robin turn against the heroes or something.
Another possibility is that the main antagonist is an evil scientist who was responsible for Ash's transformation in the first place. This scientist could be trying to create some sort of chaos in the Pokémon world by turning a well - known trainer like Ash into a girl. And now, Ash as a girl has to stop this scientist from causing more harm to the Pokémon world.