Well, clearly Natsu is the central figure as an alpha dragon. Other potential main characters could be the villains or antagonists that oppose Natsu in this new state. They might be other powerful dragons or dark forces that see Natsu as a threat because of his alpha status. Also, any characters who have a special connection to Natsu in the original story might also be main characters here to show how their relationship changes.
Natsu would definitely be one of the main characters since the title implies he is the alpha dragon. There might also be his friends from the original series, like Lucy, Gray, and Erza. They could play important roles in how they interact with Natsu in his new form.
It could be a powerful dark wizard who sees Natsu as a threat because of his alpha status among dragon slayers. This wizard might want to eliminate Natsu to gain control over the dragon slayers or to carry out some evil plan without interference.
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.
Natsu would surely be one of the main characters since it's about him speaking dragon. There might also be some dragons as main characters, like Igneel if he's still alive in the fanfiction's storyline.
Erza is also a main character. She is a strong and independent warrior, often leading the group and providing a sense of discipline among the dragon slayers.
There could be other Fairy Tail members as main characters too. They might play important roles in Natsu's new adventures. For instance, Lucy could be there to support Natsu with her celestial spirit magic. Gray might also be involved, adding his ice - make magic to the mix and having some interesting interactions with Natsu's new dragon - related situations.
Obviously, Natsu would be the main character since it's about him being born a dragon. His friends from Fairy Tail like Lucy, Gray, and Erza are likely to be important characters as well. They would probably play a role in how Natsu adapts to his new form.
In 'natsu is alpha dragon fanfiction', it's likely a story that reimagines Natsu as an alpha dragon. This could lead to all sorts of interesting plotlines. He could be involved in territorial disputes among dragons, or perhaps he has a special mission related to his alpha nature. The fanfiction could also focus on how his friends react to his new form and the changes it brings to their relationships.
There could also be some new characters introduced specifically for this fanfiction. For instance, an ancient dragon who knows all about Natsu's true nature and acts as a mentor to him. This dragon could have a complex backstory and motives, and its interactions with Natsu and the other Fairy Tail members would be a major part of the story.
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.
Obviously, Natsu is one of the main characters. He is the strongest dragon slayer in this fanfiction. His friends from Fairy Tail like Lucy, Gray, and Erza are also likely to be main characters. They often support Natsu in his battles and adventures.