Yes, there might be such fanfictions out there. Fanfiction writers often come up with unique and creative ideas like this. They might explore how Natsu's hidden identity as a Dragon Prince could impact his relationships with his friends in Fairy Tail, or how it could change the power dynamics within the story. It could lead to all sorts of interesting plot twists and character developments.
Some Tumblr blogs might also feature or recommend 'natsu is a dragon prince fanfiction'. You can search for relevant tags like #natsu #dragonprince #fanfiction. It's a bit more of a scattered search compared to the dedicated fanfiction websites, but you might discover some hidden gems that way.
Some fanfictions could focus on Natsu's journey to discover his true dragon prince heritage. This might include him facing challenges that are unique to his royal bloodline, like unlocking special dragon powers that were previously hidden from him. For example, he might learn to communicate with ancient dragons in a way he couldn't before.
I'm afraid I don't have a particular fanfiction to recommend for this. But when you look for it, also check the reviews and ratings of the stories you find. This can help you find the better - written ones. Some might focus more on the action aspects of Natsu's new identity, while others could be more about the emotional and relationship impacts.
It could be a water - based dragon. In that case, Natsu might have some water - related magic in addition to his fire magic. This would make him a very unique character as he would be able to combine two opposing elements in a way that no one else in the Fairy Tail guild could.
Gray might show up too. He could start as a bit of a rival, not believing that Natsu can really achieve great things with this Dragon God training. But as the story progresses, he could become more of a supporter. And then there's Lucy. She might be worried about Natsu during the training, and also use her celestial spirit magic to help Natsu in some unexpected ways during his training, like summoning spirits that can provide unique challenges for Natsu to overcome.
Potentially, we could see some celestial dragon characters. They might be ancient and powerful beings. Some could be friendly towards Natsu, seeing him as a new hope for their kind. Others might be more hostile, seeing him as an intruder or a threat to their traditional ways. There could also be other mages from different guilds who are either curious or envious of Natsu's situation with the celestial dragons.
Happy, Natsu's flying cat companion, would definitely be a main character. He would be there to provide comic relief as always, but also be a source of emotional support for Natsu during his transformation into a dragon god. Erza might also be a prominent character. With her strong leadership skills and powerful magic, she could be guiding the guild during the times when Natsu is still coming to terms with his powers and the changes it brings to the guild.
In the 'king of dragon slayer fanfiction', Natsu is likely a central figure. He might have special powers related to slaying dragons, like breathing fire or having enhanced strength. His character could be developed in ways that are different from the original series, perhaps with new relationships and challenges within the fanfiction world.
A popular one is 'Dragon's Love for the Celestial Mage'. This fanfiction takes their relationship to a new level. It starts with a simple adventure but soon unfolds into a story of deep love and loyalty. The author does a great job of portraying Natsu's dragon - like instincts when it comes to protecting Lucy, and Lucy's growing feelings for Natsu are also well - written.