Some fanfictions might focus on a competition between Gray and Erza. They could be competing for the title of the strongest wizard in Fairy Tail for a particular event. However, as they compete, they start to realize that their rivalry is also a form of attraction. The story could show how they gradually let go of their competitive edge and start to support each other more, leading to a romantic relationship.
A plot could revolve around Gray and Erza getting trapped in an alternate dimension. In this dimension, they have to find a way back home while also dealing with their own growing feelings for each other. They might discover secrets about each other's pasts that they never knew before. For example, Gray could learn more about Erza's time in the Tower of Heaven and how it has shaped her into the strong woman she is today. This new understanding deepens their bond.
One popular plot idea could be Natsu and Erza going on a special mission together that no one else in Fairy Tail can handle. They face a powerful dark wizard and have to combine their unique skills, like Natsu's fire magic and Erza's requip magic, to defeat the enemy.
One of the most popular plotlines is the 'Training Together' scenario. In these fanfictions, Erza and Gray train side by side to improve their magic skills. This often leads to some friendly competition and a deeper understanding of each other's abilities. For example, they might learn new techniques from each other and grow stronger as a result.
One idea could be a story where Erza and Minerva have to team up to face a powerful new dark wizard. They start off distrusting each other due to their past rivalries, but as they battle together, they learn to respect and rely on one another.
One idea could be a story where Lucy and Erza have to team up to save the Fairy Tail guild from a powerful dark magic that's slowly corrupting it. They'd face many challenges and have to rely on each other's unique magic abilities. Another could be a time - travel plot where they go back in time and meet the founders of Fairy Tail and learn some long - lost magic techniques. Maybe they also have to change a certain event in the past to save the future of the guild.
One plot idea could be a young Erza on a quest to find a magical item that was lost in a hidden part of the Fairy Tail guild. She teams up with other young members and they face various challenges like tricky puzzles and small magical beasts. Along the way, she discovers more about her own magic abilities and the history of the guild.
One idea could be a story where Juvia and Erza team up for a dangerous mission. Maybe they have to infiltrate an enemy stronghold. Juvia's water magic can be used for stealth and distraction, while Erza's versatile combat skills handle the direct fighting.
Well, a great fanfiction in this regard would first have an interesting backstory for their relationship. It could be that they had a childhood connection that they've forgotten about, and then something in the present - day Fairy Tail world triggers those memories, leading to the kiss. The setting also matters. If it's set during a big magical event like a wizard tournament, the tension and excitement of the event can add to the build - up of their kiss. And of course, the way the kiss is described. It should be passionate yet in - character for Gray and Erza, not just a random act but something that flows with the story.
Another fanfiction concept could be that Erza somehow ends up in the Naruto universe. She might join Naruto's team for a mission. Erza's strong sense of justice and her powerful magic would be really interesting to see in the context of Naruto's world. For example, she could use her armor magic to help Naruto and his friends in a battle against a powerful enemy.
One idea could be a story where Jellal, Erza and Wendy team up for a dangerous mission. Maybe they have to retrieve a powerful magical artifact that was lost in an ancient ruin. Along the way, Jellal and Erza's past relationship could add some emotional depth and tension, while Wendy's growth as a mage could be a central part of the story.
A possible plot is that Naruto is mistaken for a powerful wizard in the Fairy Tail world. Erza initially doubts him but as they get into battles together, she realizes his strength. They have to work together to stop a ancient evil that is awakening. Along the way, Naruto's positive attitude starts to change the way the Fairy Tail guild members view things, and Erza becomes more open - minded due to Naruto's influence.