First, you need to develop your OC. Decide on their personality, background, and goals. For example, if your OC is a strong - willed warrior, think about what led them to that path. Then, consider how they would interact with John Grey. Maybe they start off as rivals but later become friends. Also, research the world in which John Grey exists to make the story believable.
Writing a John Grey OC fanfiction requires careful planning. Begin with your OC. You might want to make them a bit of an outcast in society, which could lead to an interesting dynamic with John Grey. Plan out the plot. For instance, the OC could be wrongly accused of a crime, and John Grey could be the one to help prove their innocence. As you write, describe the settings vividly. Whether it's a grand castle or a simple village, it should set the mood for the story. And don't forget to let the relationship between the OC and John Grey evolve naturally over the course of the story.
To write a John Grey OC fanfiction, start by creating a unique OC. You could give them an interesting backstory, like being an orphan who has made a name for themselves in a particular trade. When it comes to their relationship with John Grey, think about the initial meeting. It could be a chance encounter in a marketplace. Then, build the story around their shared experiences, like facing a common enemy or working towards a common goal. You also need to pay attention to the dialogue. Make it realistic and in - character for both the OC and John Grey.