It's hard to say for sure without reading it all, but likely the dragons themselves would be main characters. Maybe there's a heroic dragon that stands out.
Maybe there's a human character, like a young wizard named Alex. Alex could have a special bond with the dragons and be involved in their affairs, using magic to communicate and assist them.
Often, the lead dragon characters are quite popular. For example, the brave and powerful alpha dragon that leads the flight. Also, any dragon with a unique color or special ability tends to be a favorite.
The phantom itself is likely a main character. It's the one on the flight, after all.
The flight of dragons in Avatar fanfiction could signify power. Dragons are often seen as majestic and powerful creatures, and when they take flight, it shows their dominance over the skies. In the context of the Avatar world, this could mean they are a force to be reckoned with, whether it's in terms of protecting their territory or influencing the balance of the elements.
It's hard to say for sure without reading it, but it could be Naruto. Since he's the main character of the original series, he often takes center stage in fanfictions. Maybe it also involves Sasuke, as their relationship is a central aspect of the Naruto story. Sakura could also be a main character, especially if the fanfiction focuses on the Team 7 dynamic.
It's hard to say without reading it. But it could be the dragons themselves. Maybe there's a powerful dragon king or queen leading the return. There might also be a human character who plays a crucial role, like a dragon rider or a wizard who can communicate with the dragons.
In this fanfiction, there could be a dragon princess as a main character. Let's call her Auriel. She is next in line to lead the dragons but is facing the challenge of their fall. There may also be a group of dragon riders who were once allies of the dragons but now are divided on whether to help or abandon them. And a mysterious oracle, who can see the future of the dragons, might also be one of the main characters, providing cryptic advice to those trying to save the dragons.
Well, of course, the twin dragons themselves are likely to be the main characters. They might have names like Zephyr and Nova. Zephyr could be the more impulsive one, always ready to take action, while Nova is the more cautious and thoughtful twin.
Obviously, the Father of Dragons is a main character. There might also be his dragon children. Each dragon could have its own distinct personality, like one being brave and another being more cautious.
Obviously, the prince of dragons is one of the main characters. He's likely to be the central figure around which the story revolves.