First, know the Fairy Tail universe well. Understand the characters, their personalities, and their relationships. For a 'One Wish' concept, decide who gets the wish and why. It could be a random character or someone in a desperate situation.
There might be a 'One Wish' fanfiction where the wish is used to change the past in Fairy Tail. Maybe a character wants to prevent a certain tragedy from happening, which would then lead to a whole new series of events and character developments. For example, if someone wished to stop the Tower of Heaven incident, it would change the relationships and growth of many characters like Erza, Jellal, and the rest of Fairy Tail.
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.
You can start by looking at well - known fanfiction platforms with good review systems. Check for stories that have high ratings and positive comments. Usually, these are the ones that are well - written and family - friendly.
I'm not entirely sure as I haven't read it specifically. But generally, in the 'Fairy Tail' universe, it might be about the characters making wishes on a star. It could involve their dreams, desires, and how those wishes might impact their magical adventures and relationships within the guild.
Next, develop your characters. Even if you are using the existing Fairy Tail characters, give them new traits or development arcs. For example, you could have Lucy learning a new type of celestial magic from a forgotten constellation. Also, create a detailed plot with a clear beginning, middle, and end. Maybe start with a mystery in the guild that the characters have to solve.
One should not mess with Fairy Tail fanfiction because it is a creative space for fans. Fans pour their love for the series into these stories, and messing with them would be disrespectful to their efforts.
Since I haven't read this particular light novel, I'm not sure. But in the general Fairy Tail universe, there are many unique characters like Natsu, who is always full of energy and has his unique fire - based magic. There might be new characters introduced in this light novel with their own special abilities related to wishing on a star.
There's a fanfiction that focuses on Gray and Juvia. It's a heart - warming one - shot where Juvia finally confesses her true feelings to Gray in a very unexpected but touching way. The descriptions of their emotions are quite vivid.
There are many great fanfictions out there that combine these popular series. For example, some fanfictions might create crossovers where characters from Naruto, Bleach, One Piece, and Fairy Tail meet and interact. They could be in a new adventure together, or perhaps in a battle royale situation. It really depends on the creativity of the fanfiction writer.