It could be the old friends of the original couple. They have seen the love story unfold and now they are ready to have their own stories told. They might have different personalities compared to the main couple in the original, which would bring new flavors to the sequel.
The children of the original couple. They could inherit the charm and the values of their parents in terms of love and relationships.
Maybe the main couple themselves but at a different stage of life. For instance, they could be in their middle - age, facing new challenges like empty - nest syndrome if their kids have grown up and left home. Their love, which was once young and passionate, has now transformed into a more mature and complex bond. This could be really interesting to explore in a sequel.
It's possible that some of the next - generation characters like Boruto and Sarada could be main characters as well. They could be the ones carrying on the story of 'love charades' in a new era, with their own relationships and challenges influenced by what their parents went through in the original fanfiction.
It could also be that the main character is someone who was a side character in the Christmas story but now takes the lead in the summer. Maybe a neighbor who was just in the background during Christmas but now has a big role in the summer, like leading a neighborhood summer project or something. And of course, any beloved pets or animals that were part of the Christmas story could also be important characters in the summer sequel.
Without reading the '365 days sequel story', it's difficult to say who the main characters are. But if it's a sequel, chances are it will feature the main characters from the previous story, perhaps with some new characters added to spice things up.
Since it's a sequel, it probably has the main characters from the original 'A Christmas Story'. So, there might be Ralphie, his parents, his little brother, and his friends. However, there could also be new characters that become important in the sequel's plot, like a new neighbor or a teacher at Ralphie's school.
Maybe some of the original characters from The Enemy Stars could return as main characters, like the space explorers who first encountered the enemy.
Most likely, the original main characters from 'A Christmas Story' will return. So, we can expect the boy who wanted the Red Ryder BB gun to be one of the main characters again, now probably as an older version of himself.
The main character is likely to be the boy from the original story, now grown up. He'll probably be at the center of new Christmas - related experiences.
It could be a group of coworkers. They work in a competitive environment, and there are rivalries, alliances, and betrayals among them. Their stories are full of drama and emotion, just like in a love story, but there is no romantic love involved.
Brainiac would be a great choice. He's an incredibly intelligent and powerful alien with a thirst for knowledge and a disregard for other life forms. He could come to Earth to collect data and specimens, seeing it as just another planet to add to his collection. His advanced technology and strategic mind would pose a huge threat to Superman.
Maybe some of the original characters' children could be in it. They might carry on the spirit of the story.