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.
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.
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.
One interesting plotline could be the discovery of a new type of dragon with unique abilities. For example, a dragon that can change its color to blend into different environments, which adds a new layer of strategy in battles and hiding from enemies.
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).
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.
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.
There's this 'dragons fire and ice fanfiction' called 'Fury of the Dual - Element Dragons'. In it, the dragons' fire and ice abilities are used in epic battles. The author does a wonderful job of describing the intense clashes and the beautiful yet dangerous display of the two opposing elements. Also, 'The Fire - Ice Dragon Alliance' is a great read. It shows how the dragons with different elements can cooperate, which is quite interesting.
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.
A Song of Ice and Fire is an American fantasy novel series by George R.R. Martin. In the novel, ice referred to coldness and loneliness while fire referred to passion and desire. Power was the theme of the novel, and coldness and loneliness were the symbols of power.