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.
Hermione would probably be in it. Since she's Harry's best friend, she might offer her intelligence and advice to Harry and Daphne in their post - war endeavors. Maybe she helps them with research or legal matters if they're trying to change things in the wizarding world.
There could also be interactions with the new generation of ninjas. They might view Obito as a sort of legend or a cautionary tale. Their fresh perspectives could either inspire Obito to change further or make him feel even more out of place in this new post - war ninja world.
Hermione could be involved. She might suspect Daphne of having ulterior motives regarding Harry and try to warn him, which could play into the betrayal storyline in some way, either as a catalyst or as someone who helps Harry deal with the betrayal later.
Definitely Harry, Ron, and Hermione. They were the central characters during the war and would likely continue to be important in the post - war stories. They would be using their skills and experiences to shape the new wizarding world.
Ron and Hermione would surely be important supporting characters. They are Harry and Ginny's closest friends. Ron could be there for the comic relief and also to offer his practical wizarding skills. Hermione would use her vast knowledge to help Harry and Ginny in any situation, like when they need to research a strange magical occurrence in the post - war wizarding world.
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.
Hermione would probably be one of the main characters to interact. She might be horrified at first to see Harry in such a situation and would try to find a way to free him. Ron could also be involved, perhaps being more impulsive in his attempts to rescue Harry, which might cause some problems. Dumbledore too would likely play a role. He might have some knowledge about the situation that he's not sharing right away, and his interactions with Severus would be crucial in determining Harry's fate.
Obviously Gibbs himself would be a main character interacting with Harry. He'd be like a father figure.
Snape would have a very different relationship with Harry in this scenario. Instead of being a constant source of disdain, he might see Harry as an opportunity to shape a Slytherin in a new way. Pansy Parkinson could also be involved. She might initially be against Harry being in Slytherin but later come to accept him, or they could be in a constant battle of wits.
Some of the pure - blood supremacist families who still hold grudges against Harry could be antagonists. They might not approve of Daphne getting involved with Harry, seeing him as a threat to their traditional values. For example, some of Daphne's extended family members who are still stuck in the old ways could try to break them up.