Well, there could be the dragon lords. One might be a powerful fire dragon lord who is fierce and protective of his kind. And on the ice side, a wise ice dragon lord who is known for her strategic thinking.
Another main character could be an old wizard who has knowledge about the dragons of fire and ice. He acts as a guide for the other characters, providing them with crucial information about the dragons' history, powers, and weaknesses. His actions and advice often influence the decisions made by the dragon lords and the dragon - rider, playing an important role in the overall plot.
There may also be a young dragon - rider. This character could be a human who has been chosen by a special dragon. He or she has to learn about the ways of both fire and ice dragons, and in the process, becomes a key figure in the story, forging alliances and trying to bring peace between the two dragon groups. They would face many challenges and grow as a character throughout the fanfic.
One of the most memorable characters could be the young dragon trainer. He has a special bond with his dragon and is constantly defying the odds. His courage in the face of danger makes him stand out.
Since I haven't read it, I can't say for sure. But it could be a young adventurer, a powerful wizard, or even the dragon itself.
Naruto himself could be a main character. He has a natural inclination towards befriending powerful beings, and his determination would make him a great fit to interact with the fire and ice dragons. Sasuke could also be a main character, with his Sharingan potentially having some unique interactions with the dragons' powers.
Well, one interesting plot could be about a new dragon rider who discovers a hidden power within their dragon that can control the weather. This creates a whole new dynamic in the battles and power struggles in the story.
Another possible plotline is the discovery of a new breed of dragon that has the combined powers of fire and ice. This causes a stir among the existing dragon communities as they try to figure out what this new dragon means for their future. There could be a race among different groups to either control or protect this new dragon, leading to a series of adventures and challenges.
The main characters could be the Fire and Ice Pokemon themselves. For example, a Flareon and a Glaceon. They could be on a quest to find a special crystal that can balance the power of fire and ice in their world. Their interactions and growth throughout the journey would be the focus of the fanfic.
Jon Snow is also quite popular. Imagine if he could ride a dragon? Fanfiction often delves into this idea. His mysterious parentage and his role as a leader make him an interesting character to incorporate into dragon - related storylines. He could be the one to bridge the gap between the ice (the White Walkers) and the fire (the dragons).
Sasuke, on the other hand, would be more cautious. He would study the dragons first, looking for their weaknesses. But when he realizes that they can be useful in achieving his goals, he would also form a sort of partnership with them. He could learn from the dragons' combat styles and incorporate it into his own fighting techniques.
Since I don't have detailed knowledge of this 'Fire and Ice Novel', the main characters could be individuals with a connection to the elements of fire and ice. Maybe there is a character who has the power to control fire and is in conflict with another who can manipulate ice. There could also be a character who is trying to bring peace between the two factions associated with fire and ice.
The theme of redemption can also be found. A dragon with the power of fire may have caused destruction and then tries to make amends with the help of an ice - dragon or vice versa. This is seen in 'The Redemption of the Fire - Ice Dragons' where the two types of dragons learn from each other's strengths and weaknesses to become better and save their world.