In this fanfiction, it could also be that Natsu has to deal with the politics within the dragon world. As the new king, he has to make decisions that not only affect dragons but also the relationship between dragons and humans. He might have to find a way to bridge the gap between the two races, all while trying to master his own new powers. There could be some dragons who oppose his rule, thinking he is too young or too connected to humans, and Natsu has to prove himself worthy of the title.
Maybe it involves Natsu having to learn new abilities and skills that come with being the dragon king. He could start to have a deeper connection with the dragon realm and its secrets. For example, he might discover ancient dragon magic that no one else knew about. And this new knowledge and power could be used to protect his friends and the world from new threats that are emerging because of his new status.
Well, perhaps it could be about Natsu's journey to fully embrace his new role as the dragon king. He might have to face new challenges, like dealing with other powerful dragon - related entities that are either jealous or afraid of his newfound power.
One possibility is that Natsu discovers some ancient dragon magic that transforms him into a Dragon King. He might gain new powers like the ability to control all types of dragons or access to long - lost dragon knowledge. This could lead to him having to face new enemies who are threatened by his new - found status.
Well, perhaps it could be about Natsu having some special powers right from birth that are related to dragons. Maybe he can communicate with dragons in a unique way that no one else can since he was born with this dragon - like essence.
Maybe Natsu discovers a new magic spell that accidentally turns him into a dragon. He then has to figure out how to reverse it while dealing with the new powers and instincts.
Well, it could be about Natsu having some sort of special connection to the celestial dragons. Maybe he discovers he has celestial dragon blood in him and has to deal with the powers and responsibilities that come with it. He might also encounter other characters who either fear or revere him because of this newfound aspect of his identity.
Maybe it could involve Natsu having to go through some really tough trials to prove himself worthy of becoming the Fire Dragon King. For example, he might have to battle powerful enemies that are related to the dragon world's ancient secrets.
There could be new human characters as well. Maybe some mages from other guilds who are curious about Natsu's new status. They could either be allies or potential threats. And don't forget about the celestial spirits. Since Lucy is Natsu's friend, the celestial spirits might get involved in some way. They could offer their unique powers or knowledge to help Natsu in his new role as the dragon king.
One possible plot twist could be that Natsu discovers he has to sacrifice his human memories to fully become the Dragon King. This would create an internal struggle as he values his relationships with his friends in the guild. Another twist might be that there are other hidden dragon powers within him that are awakened only when he starts the transformation process, powers that no one expected.
One possible plot could be that Natsu, while being raised by the female dragon, learns unique dragon magic that is different from what he would have learned otherwise. He might develop a special bond with the dragon, like a mother - son relationship, and the story could follow his adventures as he uses the skills taught by the dragon to protect the dragon's lair or the surrounding area from threats.
Well, it could be about Natsu suddenly finding himself in a situation where he has multiple dragon companions who are all attracted to him. Maybe he has to deal with their different personalities and powers while also trying to figure out how he got into this harem situation in the first place.
One possible plot could be that Natsu, after years of slaying dragons and facing countless battles, decides he's had enough. He might choose to retire to a quiet place, perhaps a small village. There, he could start a new life away from the chaos of fighting. Maybe he'd teach the local kids about dragons in a more peaceful way, sharing his knowledge instead of using it for combat.