It could involve Erza facing challenges in the Edolas version of Fairy Tail. Maybe she has to deal with different versions of her friends or new magical threats specific to that realm.
One idea could be exploring the backstories of the Edolas versions of the main Fairy Tail characters in more detail. For example, how did Edolas Natsu become the way he is? Another idea is to create a story where the Fairy Tail guild from Earth - land has to team up with their Edolas counterparts to fight a common, powerful enemy that threatens both worlds. Maybe a new, dark magic has emerged that only the combined strength of both guilds can combat.
One key element is the contrast between the two worlds. Edolas has its own unique magic and society, and seeing how the characters from there react to Fairy Tail's more chaotic and emotional world is really interesting.
Well, aside from the obvious ones like Natsu, Lucy, Gray, and Erza, there could also be some supporting characters from the original Fairy Tail story that become more prominent in this 'Back to Edolas' fanfiction. For example, Happy, Natsu's exceed companion, might play an important role. Maybe Wendy Marvell could also be involved, with her healing and sky - dragon slayer magic. And of course, characters like Makarov, the guild master, might also have a part to play in the events that unfold in Edolas.
In the fanfiction, Natsu and Erza's meeting could be a catalyst for a new arc in the Fairy Tail story. Suppose they discover a hidden threat to the guild during one of their interactions. This could lead to a whole new adventure where they have to gather the other guild members and use their combined skills to defeat the threat. It would be a story full of action, friendship, and magic.
First, do some research on the existing Fairy Tail Edolas arc. Understand the characters, the setting, and the rules of magic in that world. Then, come up with a unique concept or plot. It could be a simple idea like 'What if a minor Edolas character became a hero?' or something more complex. Next, create an outline of your story. Decide on the beginning, middle, and end. Start with an engaging opening, like a mysterious event in Edolas that draws the characters in.
One interesting concept could be exploring how Lucy from Edolas adapts to the Fairy Tail world. Maybe she has different magical abilities or a unique perspective on friendship compared to the original Lucy.
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.
Lucy is another popular choice. In the Edolas arc, her intelligence and determination can shine through. Maybe she's the one who figures out how to navigate the strange new world and its magic, and her relationships with the Edolas versions of the characters can be explored in interesting ways.