A young orphaned boy who has grown up in the chaos of the past 28 months. He has a unique perspective on the new world and his innocence and adaptability could make him a central figure in the story.
It could be the original characters from the source material who have now aged 19 years. Their personalities might have changed a bit due to life experiences, but they still carry the essence of who they were.
Well, a lot could occur. Maybe the characters have grown and changed. For example, if it's a superhero fanfiction, the hero could have mastered new powers in those 5 months. Or in a romantic fanfiction, a couple that was on the verge of breaking up could have either reconciled or moved on completely.
One idea could be about the survivors trying to rebuild society 28 months after the initial apocalyptic event. They might face new threats like mutated creatures or a breakdown in the tenuous order they've established.
I'm not sure exactly who the main characters are in this fanfiction without reading it. But it's likely to have some characters that are related to the original Twilight series, perhaps with some new characters added in for the 'nine months' story arc.
The main characters could be Ladybug and Chat Noir, who are now experienced heroes. However, the fanfiction could also focus on a new group of heroes that they are training. These new heroes could come from different backgrounds and have unique personalities. There might also be some characters from the past that have turned into antagonists due to some past grudges or misunderstandings. And of course, the Kwamis would still be there, guiding the new and old heroes alike.
Obviously Danny Phantom himself would still be a main character. His friends like Sam and Tucker would likely also be important. They've probably grown and developed new skills over the 10 years.
The children of Harry, Ron, and Hermione would likely be main characters. For instance, Harry's son could inherit his father's courage and be at the center of a new mystery. He might have to deal with the high expectations placed on him because of his father's legacy.
Hermione Granger would be a likely main character. She has always been a central figure. Maybe she's working on some revolutionary magical research or is involved in political reforms in the wizarding world. Her relationship with Ron and their family life could also be part of the story.
There could be a group of children who have grown up in the post - apocalyptic world. They have different skills and perspectives compared to the adult survivors. For example, they might be more in tune with nature and be able to find food sources that the adults overlook. They could also bring a sense of hope and innocence to the otherwise dark world of the fanfiction.
It could be the original characters from the source material who have new arcs in this 24 - day period.