Often, the main characters are not just the soldiers but also the commanders. They had to make tough decisions during the winter war. Their leadership played a crucial role in how the battles were fought and the outcomes. Additionally, in some stories, there might be civilians who became important characters as they interacted with the military, either helping or being affected by the war.
I'm not sure exactly who the main characters are without reading it, but they could be soldiers on either side of the Winter War, like Finnish soldiers or Soviet soldiers.
The Huntsman is a main character for sure. Additionally, there could be characters like the Huntsman's love interest, who might be a princess or a commoner with a special gift. There may also be a group of outlaws who end up being allies. And there could be a powerful wizard or witch who is either helping or hindering the Huntsman's mission in the context of the winter war.
Since it's an OC (original character) tale, the main characters are likely the original characters created for this fanfic. Without reading it, we can't know their names or exact details, but they are probably characters that the author has developed to fit into the Bleach Winter War setting.
Snow White is central to the story. She is the target of the queen's envy. The Huntsman is an important character as well. He has skills in hunting and survival, which he uses to help Snow White. The evil queen is another main character. She has powerful magic and is willing to do anything to stay in power and get rid of Snow White. In the 'Winter War' part, there may be other characters like Snow White's allies, perhaps some brave soldiers or magical creatures who join her fight against the queen's forces.
The main characters in these stories are most likely the third - graders. There could be the class clown who always makes everyone laugh during winter recess. Then there might be the smart student who teaches the others how to calculate the amount of snow needed to build a perfect snowman. There could also be the new student who experiences their first winter in a new place and how the other third - graders welcome them and include them in all the winter fun.
Most likely the main characters would be 4th graders themselves. They could be a group of friends like Tom, Jerry, and Lily.
I'm not sure as the 'Winter Story' isn't defined in detail. But it could be a family trying to stay warm during a harsh winter, so the main characters would be the parents, children, and maybe an old grandparent.
The main characters might include a detective if it's a mystery set in winter. He or she could be a jaded but brilliant investigator who has to deal with the cold and the secrets that the winter seems to hide. There could also be a group of friends who find themselves in a dangerous situation during winter, like being trapped in a remote cabin with a murderer on the loose.
In 'the winter soldier novel', the most prominent character is the Winter Soldier. However, other important characters may include those who are trying to help him break free from Hydra's control. There could be some fellow soldiers or agents who discover his true nature and decide to assist him. Also, antagonists within Hydra who will do anything to keep him under their control are likely to be part of the main characters in the story.
In the 'king winter story', King Winter is probably the main character. However, depending on the nature of the story, there could be other important characters. For example, if it's a story about a journey, there might be a group of companions who accompany King Winter. These could be a wise old man who has knowledge of the winter magic, a young boy who is eager to learn from the king, and a talking animal, like a wolf or a raven, which could be his guide or messenger.