Maybe a mysterious figure who has knowledge about Natsu's past that even he doesn't know. This character could be shrouded in secrecy, and their interactions with Natsu would slowly unfold the secrets of his origin. In the context of the 'natsu the wandering fire dragon slayer fanfiction', this would add an element of mystery and intrigue to the story.
There could be a young mage who idolizes Natsu and joins him on his adventures. This character could be inexperienced but full of enthusiasm, providing some comical moments as well as opportunities for Natsu to be a mentor.
A young dragon slayer - in - training who idolizes Natsu. This character could be from a far - off land and has heard tales of Natsu's dual powers. They could have their own unique magic related to a different element that complements Natsu's powers.
One interesting plotline could be Natsu going on a quest to find a long - lost dragon that was rumored to have special powers. This could involve him facing numerous challenges and making new friends along the way.
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.
The Magic Council could be potential enemies. Since Natsu is an outlaw, they would be the ones to try and capture him. Also, dark guilds might see him as a threat or a valuable asset to capture. They could send their strongest members after him.
Obviously, Natsu is a very popular character. He is the main focus as the fire dragon slayer. His hot - tempered and determined nature makes him an exciting character to write about.
In addition to Natsu's Fairy Tail friends, there could be some dragon characters. Maybe Igneel, Natsu's adoptive father dragon, could play a role, perhaps in the form of a spirit or a memory guiding Natsu. There might also be other powerful dragons who are either allies or enemies depending on how they view Natsu's transformation into the Fire Dragon King.
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.
Another potential character could be a dragon oracle. This oracle could have the ability to see Natsu's true nature and destiny. They could either help Natsu understand his powers and purpose or be a bit of a trickster, making Natsu's journey to discover himself even more difficult. And of course, the other members of Fairy Tail would be there to support or sometimes misunderstand Natsu as he deals with his dragon - born identity.
A powerful dark dragon slayer who has mastered both shadow and ice magic could be a great antagonist. He could be jealous of Natsu's natural ability with fire and his popularity among the guild, and thus wants to prove his superiority.
In some fanfictions, there might be original characters created by the author. For instance, a mysterious figure who has some connection to Natsu's multi - dragon slayer abilities. This character could be an antagonist, testing Natsu's skills, or a mentor, guiding him to master his powers better.