The golden trio, no doubt. Harry, who has to find his place in a world that has changed so much after the war. Ron, who might be exploring new career opportunities in the wizarding world. Hermione, who could be using her knowledge to bring about positive changes. And don't forget their families. The Weasleys, especially, would be an important part of their post - war lives as they are like a second family to Harry.
Tris and Four would likely still be main characters. Their relationship has been a central part of the Divergent series, and in a post - war scenario, they would be key in leading the rebuilding efforts or in bringing about change.
Obviously, Harry, Hermione, and Ron are the main characters. Harry, the boy who lived, is often seen as the hero. Hermione, the brilliant witch, and Ron, the loyal friend. In this fanfiction about them dropping their masks, we'll likely see different aspects of their personalities that have been hidden before.
The main characters are likely to be Harry, Hermione, and Ron, who are known as the Golden Trio in the Harry Potter universe.
Percy Jackson himself is almost certain to be a main character. After all, the fanfiction is centered around him after the war. Annabeth Chase would also likely be a main character, as she is Percy's love interest and a powerful demigod in her own right. Grover, Percy's best friend, would probably be there too, still looking out for nature and helping Percy in his new adventures.
One possible storyline could be about the trio's efforts in rebuilding Hogwarts. They might use their magic to restore the damaged parts of the school, and also deal with the memories left behind by the war. For example, Neville could be helping them in the Herbology department, which was probably in a mess after the battle.
The main characters are Harry, Hermione, and Ron, of course. Harry is the Boy Who Lived, and his courage and determination play a big role in whatever they do in the past. Hermione with her vast knowledge of magic and history is able to figure out how to navigate the time - traveling situation. Ron provides the loyalty and humor, often being the one to break the tension in difficult situations.
Harry would likely be the brave and impulsive one. He might be the first to jump into action when they face challenges during their time - traveling adventures. His role could also be to use his natural leadership skills to guide the group.
The Golden Trio, namely Harry, Hermione, and Ron. Harry is the Boy Who Lived, so his presence in the past might attract unwanted attention. Hermione is the one who probably has a plan for everything. She'd be researching how to get back to their own time and also how to not mess up the past too much. Ron is there to support his friends. He might be the one who stumbles into some unexpected situations because of his more laid - back nature, but he always manages to pull through with the help of his friends.
The two of them could also interact with the Ministry of Magic officials. Harry, being a hero of the war, would have a certain influence. He might try to push for reforms in the Ministry, and Daphne could support him. They would have to deal with bureaucrats who may not be as eager for change, like some of the old - guard pure - bloods who still hold positions of power in the Ministry.
I think Nico di Angelo could also be a central character. He has his own unique powers and backstory, and after the giant war, he might be involved in some of the darker or more mysterious aspects of the post - war world, like dealing with any remnants of the Underworld's connection to the giants' plans.