One idea could be a story where Natsu and Juvia team up for a mission. They initially clash because of their different personalities, Natsu being hot - headed and Juvia being more reserved and love - stricken for Gray. But as the mission progresses, they start to understand and respect each other's strengths, and form a strong friendship. For example, Natsu could learn about Juvia's water magic and how she can use it in creative ways, and Juvia could be impressed by Natsu's determination and never - give - up attitude.
A really interesting fanfiction is 'Juvia, Natsu and the Lost Magic'. Here, Juvia and Natsu are on a quest to find a lost magic. Along the way, they encounter many challenges. Juvia's water - based magic and Natsu's fire magic create some really cool and unique battle scenes. The story also has a sub - plot about their friendship growing stronger, and how they come to rely on each other in ways they never expected.
Well, they could have an interaction where Natsu accidentally sets off Juvia's temper. Maybe Natsu accidentally melts some of Juvia's precious water - made items. Juvia gets mad, but Natsu's cluelessness about how much he's upset her is kind of endearing. Eventually, Juvia forgives him when she sees how he was just being his usual, careless self.
One plot idea could be that Natsu and Juvia are on a mission together in a mysterious, ice - covered land. Juvia's water magic is affected by the extreme cold, and Natsu has to use his fire magic to keep her safe while they search for a powerful, lost artifact. Along the way, they start to understand each other better and develop a deeper bond.
One plot idea could be that Juvia and Natsu are forced to team up on a mission in a dangerous, enchanted forest. Along the way, Juvia's feelings for Gray start to shift towards Natsu as she sees his determination and kindness in a new light. Another could be a body - swap situation where Juvia and Natsu swap bodies and have to learn to deal with each other's powers and personalities, leading to some comical and heartwarming moments. A third idea is that in an alternate universe, Juvia and Natsu are childhood friends, and they have to face the challenges of growing up and protecting their world together, with their relationship evolving from friendship to something more romantic.
Realistically, their relationship could start with mutual respect. Juvia respects Natsu for his strength and his loyalty to the guild. Natsu respects Juvia for her skills. Then, they could start working on more missions together. During these missions, they would see each other's flaws and strengths up close. For example, Natsu might see Juvia's over - the - top love for Gray as a sign of her loyalty, and Juvia might see Natsu's impulsiveness as part of his charm. As they get to know each other better, they could start having deeper conversations about their pasts and their dreams. This would gradually lead to a change in their feelings for each other.
One unique plotline is where Juvia and Natsu accidentally swap magic powers. This leads to a lot of chaos as Juvia tries to control Natsu's fire magic and Natsu struggles with Juvia's water magic. They have to learn to adapt quickly to this new situation while also dealing with the threats that come their way.
They could leave for a quest of self - discovery. Natsu might want to learn more about his past, especially about his dragon, and Juvia could be looking to find out more about her water magic's origin. So they leave Fairy Tail to explore different places and meet various mages who might have the knowledge they seek.
One interesting plotline could be Natsu and Juvia teaming up for a difficult mission. They have different magic styles, Natsu with his fire magic and Juvia with her water magic. Their interaction during the mission, like Juvia being a bit shy around Natsu at first but then growing more confident as they face challenges together, can make for a great story.
Gray would be a great character to pair with them. Gray has a long - standing relationship with Natsu, and his ice magic contrasts well with both Natsu's fire and Juvia's water. Their interactions can add a lot of humor and depth to the story, like Gray constantly arguing with Natsu while also trying to work together with Juvia.