One interesting storyline could be a group of Fairy Tail characters competing in a university-wide magic tournament. It would be full of action and show off their different magical abilities.
Another could be about a character who is new to Fairy Tail University and has to overcome the challenges of fitting in while also dealing with a mysterious magical threat that only they seem to notice at first. This would involve elements of mystery and character development.
One interesting storyline could be a character from our world getting transported into the Fairy Tail kingdom and having to learn magic to survive. They could form unexpected alliances with the guild members and go on adventures together.
One interesting storyline could be an alternate version of the Fairy Tail guild's rise to power within the empire. Maybe they face different types of magic and political challenges that are unique to this fanfiction setting.
A possible storyline is about a character from Fairy Tail who transfers to the Highschool DxD school. They have to adapt to the new environment which is full of devils, angels, and fallen angels. Along the way, they make new friends and enemies, and their Fairy Tail magic causes quite a stir among the students.
One interesting storyline could be Naruko and Laxus teaming up for a dangerous mission. They might start off not getting along due to their different personalities. Laxus is often seen as brash and powerful, while Naruko could bring her own unique skills and a more upbeat attitude. As they face challenges during the mission, they gradually learn to respect each other and combine their powers in unexpected ways, leading to a strong friendship or even more.
Perhaps a fanfiction where a member of the Magic Council loses their memory and ends up in Fairy Tail. The mages there take care of them, not knowing who they really are. As the council member regains their memories slowly, they start to see Fairy Tail in a new light and question some of the council's strict rules. This could lead to a change in the relationship between the council and the guild in the story.
In some fanfiction, Trunks could be involved in a time - travel related plot within the Fairy Tail universe. Maybe he discovers a way to travel through time in this new world, and has to prevent a dark future where the guild is destroyed. He would use his knowledge and skills to change the course of events, while also learning about the different magics and cultures in Fairy Tail.
Perhaps the talking cat is actually a transformed wizard who was cursed. In the fanfiction, it could be trying to find a way to break the curse while also getting involved in the daily chaos of the Fairy Tail guild. It could form a special bond with a particular character, like Natsu, and they go on quests together to find a cure.
In some fanfictions, Tobi might have a backstory related to Fairy Tail that was previously unknown. For example, he could be a long - lost member's relative. This would add a new layer of mystery and drama to the story. He could then be on a quest to discover his connection to the guild, all while getting involved in the guild's adventures.
One interesting storyline could be Natsu and Wendy going on a special mission together. Maybe they have to find a rare magical item that can save the guild. Along the way, Natsu's impulsiveness gets them into some trouble, but Wendy's healing magic and calm nature help them get out of it.
Another storyline might involve a Power Ranger getting stranded in the Fairy Tail world and having to learn magic in order to find a way back home. Along the way, they could form strong bonds with the Fairy Tail guild members and help them in their quests.