Well, Naruto is likely to be one of the main characters. Since it's a Naruto - related fanfiction, he'll probably be at the center of the story. There might also be characters from the dragon slayer world that are important, like the typical dragon slayer mages. But without reading it specifically, it's hard to say exactly who all the main characters are.
The main character is most likely Naruto. However, depending on the plot of the fanfiction, there could be other significant characters. For instance, there might be a dragon slayer mentor figure who teaches Naruto about the ways of the dragon slayer. There could also be a villain who is a powerful dragon slayer gone bad. And it's possible that some of Naruto's ninja comrades from the original series play important roles as well, either by supporting Naruto or having their own story arcs within the context of this unique fanfiction.
One interesting concept could be the combination of Naruto's ninja abilities with the dragon slayer magic. For example, Naruto might use his shadow clones in a new way while also wielding dragon slayer powers like breathing fire or ice. Another concept could be the interaction between Naruto and the dragon slayer characters from the fanfiction world. Maybe they form teams or compete against each other in unique battles.
Most probably, the dragon master is the central figure. But we might also see other important characters. For instance, the senseis like Kakashi could play a role. They might be guiding the dragon master in some aspects, especially when it comes to using the dragon powers in a way that aligns with the values of the ninja world. Additionally, there could be antagonists who are after the dragon master's powers, like some rogue ninjas or even a new group created specifically for this fanfiction.
Well, Naruto is a must - have main character. He might be the one who unlocks the dragon slayer bloodline's true potential. Hinata could be another main character, her Byakugan ability might interact in interesting ways with the dragon slayer powers. There could also be a mysterious character who is an elder of the dragon slayer bloodline clan. This character could hold the key to understanding the bloodline's history and secrets, and thus be an important main character in the fanfiction.
Often, they start off as strangers. The Poison Dragon Slayer might be confused by the Ninja way of life, like the use of hand signs for jutsu. Naruto, being the friendly and curious type, would approach the slayer and try to understand their powers. They gradually build a friendship based on mutual respect for each other's abilities.
Naruto's sense of responsibility would grow. Since the elemental dragon is a powerful entity, he has to make sure it's not misused. He would take on the role of protecting it as well as using it for good. This would lead to him maturing and becoming a more respected leader in the ninja world. He'd also have to learn how to control his emotions better because the dragon's power could be affected by his state of mind.
Well, Naruto is most likely one of the main characters since it's in the title. There may also be other characters from the Naruto series like Sasuke or Sakura. And if it's about a lightning dragon slayer, there could be new characters introduced, perhaps a mentor - like figure who teaches Naruto about slaying lightning dragons.
Natsu could be a great ally. Since he is also a dragon slayer, he could offer advice and support to Lucy in her elemental dragon - slaying journey. Happy, Natsu's flying cat companion, could also be helpful in terms of providing transportation and some comic relief. Erza is another potential ally. Her strong combat skills and leadership could be valuable when Lucy faces tough dragon - slaying challenges.
Typically, the main character is the dragon slayer. They are often a brave and determined individual with unique skills and a strong will.
Since I don't have the actual fanfiction, it's hard to say for sure. But it's likely that the dragon slayer is a main character. There could also be other characters like villagers who are being affected by the situation related to 'the nothing' and perhaps other dragon slayers or mentors.
In some fanfictions, Happy, the flying cat, could also be an important character. He could provide comic relief and also be involved in some of Lucy's adventures as a dragon slayer. For example, he might help her find clues or get out of difficult situations. And then there could be original characters created specifically for the fanfiction. These characters could be other dragon slayers or powerful mages that interact with Lucy in different ways.