One idea could be to explore an alternate ending for a particular arc. For example, in the Tartaros arc, what if Natsu and the others had to face a more powerful version of Mard Geer? Another idea is to focus on the backstories of minor characters during an arc. Maybe tell the story of how a random guild member got involved in the events of the Grand Magic Games arc. Also, a time - travel fanfiction set within a Fairy Tail arc could be cool, like if a character went back to the Tower of Heaven arc and changed some key events.
A great idea for Fairy Tail arc fanfiction is to rewrite an arc from a different character's perspective. For example, rewrite the Eclipse Gate arc from Wendy's point of view. This would give new insights into the events and character relationships. Another option is to introduce new magic in an existing arc. During the Sun Village arc, you could create a new type of fire magic that the villagers discover. You could also write a fanfiction where the consequences of an arc's events are explored further. After the Tenrou Island arc, what if the loss of magic power had more long - term and unexpected effects on the guild members?
You could write a fanfiction where the villains of a Fairy Tail arc team up in a different way. Say, in the Alvarez Empire arc, if the Spriggan 12 had formed alliances based on different motives. Or, create a story where a character from a different guild joins Fairy Tail during an arc and how their presence affects the flow of events. For instance, a powerful mage from Sabertooth joining Fairy Tail during the Phantom Lord arc. Additionally, a fanfiction about a character's inner struggle during an arc, like Gray's struggle with his demons during the Avatar arc, can be really interesting.
For a Fairy Tail Tartaros Arc fanfiction, you might consider writing about a new magic that is introduced during the arc. It could be a magic that is a combination of different existing magics in the Fairy Tail universe. The story could revolve around a young wizard who discovers this new magic and uses it to turn the tide in the battle against Tartaros. You could also explore how the discovery of this new magic affects the power dynamics within the guild and among the other characters in the arc.
One interesting aspect could be the different versions of the characters. In Edolas, the characters often have different personalities or abilities. For example, the way Natsu behaves in Edolas might be a unique take on his character. It can show how the original character could have developed differently in an alternate world.
You could do a time - travel fanfiction. Have a character go back in time to when the Fairy Tail guild was first founded and see how they interact with the founders. Or, write a story where the characters swap powers. So, Erza would have Lucy's celestial magic and Lucy would have to use Erza's requip magic. This would lead to a lot of comical and also challenging situations for them. Also, you could write a fanfic about the guild taking on a mission in a completely new and strange land, filled with magic they've never seen before.
One idea could be exploring an alternate universe where the main characters have different magic abilities. For example, Natsu could have ice - based magic instead of fire. Another idea is to focus on the backstories of the minor characters in more depth, like how they came to join Fairy Tail. A third idea would be to create a time - travel fanfiction where characters go back in time to change a significant event in the Fairy Tail world.
One idea could be exploring an alternate universe where the main characters have different magic powers. For example, Natsu could have ice - based magic instead of fire. Another idea is to focus on a backstory for a minor character, like how they came to join the guild. Maybe a story about a character's journey to find a long - lost magical artifact that has a connection to Fairy Tail's history.
You could write a Fairy Tail fanfiction centered around a character's growth. For instance, take Wendy. You could write about her journey to master new and powerful dragon - slayer magic, facing challenges that force her to grow not only in power but also in confidence and leadership skills. It could involve her going on a solo adventure to a far - off land to learn from a reclusive dragon.
One idea could be Wendy going on a solo adventure to a far - off land in the Fairy Tail universe to discover a new type of magic. She could meet unique characters and face challenges that test her skills and growth as a mage.
One interesting fanfiction could be one that focuses on Daphne's backstory before the arc. It might explore her motives and how she came to be the character she is in the arc.
One idea could be to set the Fairy Tail characters in a modern-day high school. Natsu could be the trouble - making but kind - hearted delinquent, and Lucy could be the new student who gets drawn into his wild adventures. Another idea is to have them in a modern city where magic is a secret but still exists, and they have to fight against an evil corporation that wants to use magic for their own gain.
One idea could be to explore the backstory of a minor character in 'Fairy Tail Book 1'. For example, you could write about how a particular guild member joined the guild. Another idea is to create an alternate timeline where a key event in the book didn't happen or happened differently, like if Natsu didn't find Happy. You could also focus on a relationship, such as the friendship between Lucy and Erza, and show how it developed further through new adventures not in the original book.