An ordinary citizen. Maybe a young person who is just starting their life, like a college student. They have to suddenly face this reality and their journey could be about how they adapt, whether they try to fight for the survival of the country or just focus on living their remaining days to the fullest.
A scientist could be a main character. He or she might be the one who discovers the signs or reasons that America has only a year to live, and then tries to find solutions or warn others.
It could be about a series of catastrophic events that are predicted to occur within a year that will end America. Maybe natural disasters start hitting one after another, like massive earthquakes and super - hurricanes.
There could be a young and ambitious trainer named Alex. He's on a quest to become the best Pokemon trainer in America.
The main character could be an ordinary citizen who just happens to be in the wrong place at the wrong time and gets kidnapped. For example, a tourist visiting America.
Another theme could be the weight of sacrifice. If Naruto has lost his will to live, it might be because he has made so many sacrifices and now feels that it's all for nothing. This can explore the idea of how much a person can give before they break.
The fans themselves could be main characters. They could be shown dealing with their emotions, sharing memories of the singer, and trying to keep the singer's legacy alive. For example, a group of super - fans might form a club dedicated to the singer after the death.
Often, there will be some of Captain America's old friends or comrades in these fanfics. For example, Bucky Barnes might make an appearance. He could be like an uncle figure to the son, teaching him about the old days and some combat skills. There could also be new characters created specifically for the fanfic, like a young sidekick for the son who has different powers and a different background, adding more depth and variety to the story.
A politician who drives the empire - building policies could be a main character.
One likely main character could be the personification of Canada, like a young, polite and nature - loving character. Another could be the personification of America, maybe a confident, ambitious and diverse character. And there could also be side characters like citizens from both countries who witness and are affected by the hugs between the two main characters.
They could be original characters created specifically for this fanfic. Maybe America is a free - spirited and adventurous character, while Maxon is more reserved and thoughtful.
A fearless warrior. This character could be a part of the imperial army or a lone wolf. They might be on a quest to avenge their family who was wronged by some powerful figure in the empire. Their journey would take them through different parts of the 'empire of winter', facing various challenges.