It's hard to say without actually reading it, but it could feature the classic Fairy Tail characters like Natsu, Lucy, Gray, and Erza. They are the most popular and central to the original series.
Perhaps it has a really in - depth exploration of the Fairy Tail universe. It might delve into the backstories of minor characters, or expand on the lore of the magic guilds in great detail. For example, it could explain how certain magic types originated in a way that the original series only hinted at.
Well, adventure is a big theme. Fans love to write about the Fairy Tail guild going on new and exciting quests that were not in the original story. Power-ups are also a theme. Writers might give characters new abilities or make them reach new levels of power. Friendship is also a key theme, just like in the original Fairy Tail. It's about how the characters support and rely on each other in different situations.
Natsu is a great character to write about. His fiery personality and his dragon - slayer magic make for exciting stories. Gray is also interesting, with his ice - make magic and his constant rivalry with Natsu. And Erza, with her strong leadership and her many different armors and weapons, offers a lot of possibilities for fanfiction writers.
It adds more content. The official Fairy Tail series has a limited number of episodes and chapters. Fanfiction fills in the gaps. For example, it can create stories about what the characters were doing during the time - jumps in the original story.
If Lucy never joined Fairy Tail, the friendships and relationships among the characters would form in a very different way. Also, many of the story arcs might not unfold as they do in the original plot.
One popular theme is alternate universes (AUs). Writers like to explore what would happen if the Fairy Tail characters were in different settings, like a modern - day high school or a steampunk world. Another common theme is romance. Fans often pair up their favorite characters in different relationships, such as Natsu and Lucy or Gray and Juvia.
Erza and Jellal are also a favored couple in Fairy Tail fanfiction. Their complex past, with Jellal's redemption arc, adds a layer of depth to their potential relationship. It allows for stories that deal with forgiveness, love that overcomes past wrongs, and the growth of their connection over time. There's also Gajeel and Levy, as their interactions in the series suggest a budding relationship that can be elaborated on in fanfics.
You can try websites like FanFiction.net or Archive of Our Own (AO3). FanFiction.net has a large collection of Fairy Tail fanfics. Just search for 'Fairy Tail' in the search bar, and you'll get a bunch of results. AO3 also has high - quality fan works, and it often has more in - depth and unique takes on the Fairy Tail universe.
The condition could be that the main character has to give up their magic for a period of time. This would create a lot of interesting plot twists as they'd have to rely on their wits and the help of their friends in the Fairy Tail guild instead of their magical abilities.