Harry Potter and his friends could be important characters as well. Their relationship with Draco could be explored in different ways. Maybe they start to see Draco in a new light and begin to trust him a little more. Hermione Granger, with her intelligence and strong moral compass, could play a role in Draco's redemption or self - discovery journey.
Draco's family members, especially his parents, Narcissa and Lucius Malfoy, are likely to be in the story. Their interactions with Draco and how they deal with the aftermath of the war could be a significant part of the plot. Also, some minor characters from the wizarding world, such as shopkeepers in Diagon Alley or teachers at Hogwarts, could make appearances and influence Draco's life in different ways.
Zuko is very likely to appear. As her brother, he would play a crucial role in her life after the war. He could be the one trying to help her redeem herself or dealing with her if she still poses a threat. Mai and Ty Lee could also be there. They were once her friends/companions, and their relationships would be interesting to explore post - war. Maybe they would be hesitant to trust her again at first. Aang would be another possible character. As the Avatar, he might be involved in Azula's fate, whether it's in terms of forgiveness or making sure she doesn't cause more harm.
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 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.
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.
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.
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.
Well, Ginny might interact with Draco if he's a maid in the fanfiction. She's a strong - willed character and her response to Draco in this new role could range from amusement to irritation. Another character could be Ron. Ron has always had a bit of a feud with Draco, and seeing him as a maid might bring out different reactions from Ron, like teasing or even a bit of begrudging respect if Draco does his job well. And of course, the other Slytherins might interact with him too. They could be embarrassed by his new position or try to help him depending on their individual personalities.
Sasuke would be a likely character to appear. Since he and Naruto have a deep connection, Sasuke might cross paths with Naruto during his wanderings, either as an ally or an antagonist depending on the plot.
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.
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.