In some fanfictions, Erza's father could be a powerful mage who was lost in a great battle against dark forces. His absence then becomes a driving force for Erza's growth and her determination to fight evil.
One idea in fanfiction could be that Erza's father was an outcast mage. He might have had some unique magic abilities that were feared by the mainstream magic community. This led to his disappearance, and Erza unknowingly inherits some of his powers, which she discovers gradually in her adventures.
In some fanfictions, the plot might revolve around a magical curse that can only be broken by a true love's kiss between Erza and Jellal. They have to go through various trials and tribulations together, and as they get closer to breaking the curse, their feelings grow until they finally share that kiss. This type of plotline adds an element of adventure and mystery to their relationship.
Maybe it's because they come from different fictional universes with very different values. Naruto is from a world of ninjas where loyalty to the village and personal growth through hard training are emphasized. Erza is from Fairy Tail with a more guild - centered and magic - based world. Their different outlooks and ways of doing things might clash in the fanfiction, leading to Naruto's hatred.
One possible plotline could be that Erza sacrifices herself to save her guildmates from a powerful dark magic attack. She stands in the way, knowing it will cost her life, but she does it to protect those she loves.
One possible plotline could be the redemption of Jellal. After all his past wrongdoings, he tries to make amends and prove himself worthy of Erza. Their kiss could be the moment when Erza finally fully accepts his transformation and they start a new chapter together.
Well, their child could be a symbol of hope in the fanfiction. Since Erza and Jellal have such complex pasts, the child might bring a new era of peace between different factions. For example, the child could have the power to bridge the gap between the Magic Council and the independent guilds. Also, the child's appearance might be a mix of Erza's red hair and Jellal's mysterious eyes, making it stand out in the Fairy Tail world.
Another way is to create a magical encounter where Erza is able to communicate with her father's spirit or a projection of him. Through their conversations, the depth of their relationship can be explored. This can include things like her father's hopes and dreams for her, and any regrets he may have had before his disappearance or death.
In some fanfictions where Erza dies, it could lead to a dark and tragic turn for the Fairy Tail guild. Her death might cause the other members to question their strength and purpose. For example, Natsu might be consumed by a desire for vengeance against the ones who caused her death.
Maybe Naruto, being a devil, has some special powers that are needed to save the Fairy Tail guild from a great threat. Erza is initially skeptical of him, but as they work together, they develop a bond. Along the way, there could be flashbacks to Naruto's past in his own world and how he became a devil, which would add depth to the story.
One possible reason could be a misunderstanding. Maybe Erza misinterprets Natsu's actions as being reckless and endangering the guild, so she takes harsh measures to 'teach him a lesson'.
Perhaps the fanfiction could start with Jellal proposing to Erza in a very romantic way, like on top of a mountain overlooking a beautiful sunset. Then, the preparations for the wedding could be filled with some comical moments, like Natsu trying to help with the decorations but making a mess. After they get married, they might go on a honeymoon to a far - off land, where they encounter some old enemies who are now reformed and they all work together to solve a new mystery in that land. The fanfiction could end with them coming back to Fairy Tail stronger than ever and ready to face whatever comes next as a married couple.