The fact that they have a long history together in the Fairy Tail guild is a great basis for fanfiction. There are so many 'what if' scenarios that can be created. What if Natsu had confessed his feelings for Erza earlier? What if Erza had chosen Natsu as her partner for a certain mission instead of someone else? These kinds of questions can be explored in fanfiction, and it makes their relationship really interesting to read about.
In fanfiction, their relationship can be explored in different ways. They are both very powerful wizards in Fairy Tail. So, when they team up in a story, their combined strength can be used in creative ways against strong enemies. Also, there's the underlying friendship and respect they have for each other in the original series, and fanfiction can expand on that. It could be a story where Natsu is the only one who can reach Erza when she's in a dark place, or vice versa.
In many fanfictions, Natsu and Erza often have a complex relationship. Natsu is usually depicted as a bold and passionate character, while Erza is strong - willed. Their relationship might start from comradeship within the guild. Some fanfictions may explore how they gradually develop deeper feelings for each other, like through shared adventures and facing challenges together. This can lead to a mutual understanding and respect that could potentially turn into a romantic relationship.
It could also show the complexity of their relationship. Maybe Erza's actions are out of her own insecurities or fears, and Natsu getting hurt is a consequence of her not being able to handle those emotions properly. This would mean that their relationship is not just about friendship or comradeship, but also about understanding each other's inner turmoil.
The way it fits into the 'Fairy Tail' universe. If the fanfiction can incorporate the magic, the guild's dynamics, and the overall world - building of 'Fairy Tail' while still focusing on Natsu and Erza's relationship, it becomes really interesting. For example, a fanfiction where the kiss is a result of a magical bond or a quest that they undertake together within the Fairy Tail world.
In Natsu x Erza fanfic, their relationship can be full of adventure - based camaraderie. Natsu is often depicted as the impulsive and powerful mage, while Erza is the strong - willed and disciplined one. They might team up frequently, with Natsu's spontaneity contrasting Erza's calculated moves. This can lead to interesting character dynamics, where they both learn from each other and grow together in their fictional adventures.
In some fanfictions, Natsu and Erza might have a moment where they confide in each other about their pasts. Erza could open up about her time in the Tower of Heaven and Natsu about his search for Igneel. This sharing of deep secrets would bring them closer and change the dynamic of their relationship from just being guild mates to something more like true friends who support each other unconditionally.
There's also a possibility that it causes a rift in the guild. Other members might take sides. Some might side with Erza, believing she had a good reason, while others might side with Natsu, feeling that Erza was too harsh. This could create a lot of tension within the Fairy Tail guild and further complicate the relationship between Erza and Natsu.
It could be that Erza scolds Natsu too harshly for something he did wrong. Natsu, who might be more sensitive than he seems, could end up crying from the severity of her words.
Their relationship would deepen in many ways. Natsu would be constantly worried about Erza's well - being. He'd be at her side all the time, which is a big change from his usually wandering nature. Erza would rely on Natsu more for emotional support. They'd start having more serious conversations about things like where to live, how to raise the child, and what kind of future they want for their family. This would bring them closer together and make their bond stronger than ever.
One common plotline could be how they handle their daily lives together while still being part of their guild. Maybe they have to balance their relationship with their duties as mages.
In many fanfics, their relationship is often based on mutual respect. Natsu respects Erza's strength and leadership, while Erza respects Natsu's tenacity. For example, in some fanfics, when they are in a battle together, Natsu will follow Erza's strategic plans without hesitation.