A unique way to develop their relationship could be through a shared dream or vision. They both see a future where Fairy Tail is in great danger and they are the only ones who can save it. But in this future, they are also a couple. This vision makes them question their feelings for each other in the present. They start to act differently around each other, trying to figure out if they can be more than just friends and comrades. This journey of self - discovery and exploration of their relationship can be very interesting.
Their relationship could be developed in a unique way if they had to swap magic powers for a short period. Gray having to use Erza's requip magic and Erza using Gray's ice - magic would force them to understand each other on a deeper level. They would have to train together to master the new powers, which would lead to a lot of close - quarter interactions and shared experiences.
One unique way to develop their relationship could be through a shared loss. For example, if a beloved member of the guild was killed. Natsu might react impulsively with anger, Erza would be more stoic but determined for justice, and Mirajane would be the one to comfort them both while also being sad herself. This common grief could bring them closer together, with Natsu realizing he can rely on the two women in different ways. Erza could see Natsu's softer side and Mirajane could see a new depth to Erza.
Their relationship could be developed uniquely by having them start as rivals in a magical competition within the guild. As they compete, they learn about each other's strengths and weaknesses, and a mutual respect forms. This respect then turns into an unexpected friendship that eventually grows into love.
Their relationship could develop through shared experiences. For instance, if they are both captured by a common enemy, they would have to rely on each other to escape. This would create a bond of trust between them.
Their relationship can be developed through shared battles. For example, in a tough fight against a strong guild from another town, they rely on each other. Natsu protects Erza when she's in a vulnerable state during a requip, and Erza in turn uses her strategic mind to guide Natsu's brute force attacks. This mutual dependence can strengthen their bond.
Their relationship could develop through a shared love for a particular type of magic. For example, if they both have an affinity for celestial magic (even if Rogue in a different way), they could bond over researching and exploring new aspects of it. This would give them a common ground and something to always talk about.
Their relationship could develop through a shared love for a certain type of magic. For example, if they both find an ancient and powerful magic that only they seem to understand, it could bring them closer. They start sharing their knowledge and experiences related to this magic, which deepens their bond.
Their relationship could be developed uniquely by having Lisanna teach Natsu some of the more delicate magic she learned in Edolas. This would create a role - reversal situation where Natsu is the one learning from her. It would show a different side of their dynamic and deepen their connection as they spend time in this new kind of interaction.
Another way is by exploring their pasts. Maybe there was a misunderstanding that led to their initial animosity. By delving into their backstories, they can come to terms with what really happened and start to build a more positive relationship. They could have a heart - to - heart conversation where they realize they have more in common than they thought.
There are also fanfictions that focus on their potential as a couple. Their on - screen chemistry in the original Fairy Tail series can be a starting point for writers to imagine a romantic relationship between them. These stories might include cute moments like Erza blushing when Gray compliments her new armor or Gray getting flustered when Erza scolds him in a more affectionate way than usual. Fanfiction allows fans to explore different possibilities for these two beloved characters.
Erza could be developed by showing her vulnerability. Usually, she is very strong and composed. But in this situation, her being embarrassed and naked makes her more human. We can explore how she overcomes her insecurities and uses her inner strength.