Start with a strong plot. For example, you could begin with Gray saving someone and that person turns out to be his future love. Then, build their relationship gradually. Show their interactions, their conversations, and how they start to care for each other. Don't rush the love story. Let it develop naturally over the course of the fanfiction.
First, create a well - thought - out OC. Decide on their appearance, personality, and backstory. For example, if your OC is a shy person, think about how that would interact with Gray's more stoic nature. Then, come up with a plot. It could be a simple adventure where they go on a quest together, or something more complex like solving a mystery in the Fairy Tail guild that involves Gray's past. Also, make sure to write in a way that stays true to the world of Fairy Tail and Gray's character.
Gray Fullbuster's love story in Fairy Tail is quite complex. He has a deep connection with Juvia. Juvia starts off as a bit of a stalker, but gradually Gray warms up to her. Their relationship develops over time as they go on various adventures together, facing many challenges side by side. And through these shared experiences, Gray comes to truly care for Juvia.
To start writing, create a strong opening. If it's a crossover with the Fairy Tail and the DC Comics universe, you could start with Gray being transported to Gotham City. Describe the city from his perspective. Then, introduce a conflict that involves both Gray's powers and the villains or heroes of Gotham. As you write, keep in mind the personalities of both Gray and the new characters he'll interact with, and build the story from there.
First, get to know the characters well. Study Gray Fullbuster's personality, his backstory, and his relationships in the Fairy Tail series. For the OC, create a detailed character profile with a unique personality. Then, start with an interesting plot idea, like maybe the OC has a special power that Gray needs. Write in a way that shows their chemistry.
You can start by looking on fanfiction websites such as Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search specifically for Gray Fullbuster ones. There are also some dedicated Fairy Tail fanfiction forums where users share their works.
There are fanfictions where Gray's love story is intertwined with his growth as a wizard. For instance, he might fall in love with a new character while on a mission to protect Fiore. In this type of story, his love could be what gives him the extra strength to face powerful enemies.
Archive of Our Own (AO3) also has a good number of these fanfictions. It has a well - organized tagging system, so you can easily find what you're looking for. Plus, the quality of the writing on AO3 is generally quite high.
The story sees Gray Fullbuster's growth in love. He starts as a hesitant individual but eventually finds the strength to embrace love. It's a tale of self-discovery and romance within the Fairytail universe.
The ending of Gray's love story in Fairy Tail is bittersweet. They face many challenges but ultimately find a way to be together, though not without some sacrifices.
Since 'lemon' fanfiction often crosses the line into adult content, we should focus on the proper characteristics of Gray in regular fanfiction. Gray is known for his stoicism, his rivalry with Natsu, and his strong sense of justice. These traits should be the focus rather than any improper aspects that might be in 'lemon' fanfiction.