I don't know as I haven't read it. Maybe there are children with special powers who are the main characters.
Since we don't have the details of the story, it's difficult to say exactly. But it's likely that the 'children of fire' themselves are the main characters. There could also be some adults or other creatures in the story that interact with these children, like a wise old mentor who guides them, or an antagonist who tries to stop them from using their fire - related abilities.
Maybe it's a victim of the fire. Someone who has lost their home or loved ones in the fire could be a main character, and the story could revolve around their journey of coping with the loss and trying to rebuild their life.
The main characters in Fire Emblem Fates Children Story are, of course, the children of the main characters from the original Fire Emblem Fates. They each have their own distinct personalities and abilities. For instance, some might be natural leaders, while others are more skilled in magic or combat.
I'm not sure as I haven't read it in detail, but usually in such a story, there might be a character who has to deal with the effects of frost and fire, like a survivor or an explorer.
I'm not sure as the specific 'fire and ice short story' isn't fully defined here. But usually in such a story, there could be a character who is associated with the element of fire, perhaps a passionate and impulsive person. And another character might be linked to ice, a cold and calculating one.
The main character is a man who is traveling in the Yukon during extremely cold weather. There is also his dog, which is with him throughout his journey. The dog is more attuned to the danger of the cold than the man.
In a 'fire watch short story', the main character is probably the fire watcher. This character may have a backstory that led them to this job. Maybe they have a family to protect, or they are doing it as part of a community service. There could also be other characters like a fellow fire watcher with whom they share their shift. This person could be a friend or someone with a different personality, which might lead to some interesting interactions. And there could be a character who represents the authority in the area, like a ranger if it's in a forest or a building manager if it's in a building, who gives instructions or sets the rules for the fire watch.
There are two main characters in the 'Children of the Corn' short story. Burt and Vicky. They are traveling together and end up in the spooky town. Burt is more of the assertive one trying to figure out what's going on. Vicky is his partner, and they both have to face the horror of the children in the town.
The main characters are the four children of Lir, their father Lir, and their stepmother Aoife. The children are the ones who endure the transformation into swans.
I'm not sure specifically as I don't have the full story, but most likely the children themselves are the main characters. There could also be some other characters like animals in the woods that play important roles in their adventure.
One possible theme could be transformation. Since fire is often a symbol of change, the 'children of fire' may go through some sort of personal transformation. Another theme might be the struggle between the ordinary and the extraordinary. If these children are special in some way related to fire, they may face difficulties in fitting into a normal world.