Well, Harry Potter himself could still be a main character. Since it's about family alliances, his friends' families like the Weasleys would likely be important too. Hermione's family might also be involved, even if they are Muggle - born, as they could contribute in unexpected ways. And who knows, some minor characters from the original series might step up and become main characters in the context of the family alliances.
It's possible that some of the older generations from different families are the main characters. For instance, Arthur Weasley and Lucius Malfoy could be key players. They represent their respective families and their actions could shape the family alliances. Their different ideologies and how they navigate the alliance would be a major part of the story. There might also be new characters introduced who are related to the existing families and they play crucial roles in the alliance.
Obviously, Harry Potter himself is often a central figure. His friends like Ron Weasley and Hermione Granger also play important roles as they are part of his extended family - like group. Ginny Weasley, as Harry's wife in the original series, is also a key character. Then there are the older generation characters such as Molly and Arthur Weasley who bring their wisdom and family values to the alliance.
Most likely, it would include the main characters from the Potter series like Harry Potter himself. Since it's about a broken alliance, his friends Ron Weasley and Hermione Granger would probably be involved as well. There could also be other important characters from Hogwarts or the wizarding world, such as Dumbledore or Snape, depending on the nature of the broken alliance.
Obviously, Harry would be one of the main characters. He is the one making the decision to break the alliance, so his character development would be central to the story.
The main characters in an 'emerald alliance harry fanfic' are hard to determine without reading it. However, it's likely to have a mix of original and new characters. There could be a character who is an outcast in the wizarding world but has unique knowledge about emeralds and becomes a key figure in the alliance. Harry could be a central figure if the story ties in closely with his adventures, or it could be a completely different set of characters who are driving the plot forward around the concept of the emerald alliance.
Obviously, Harry Potter would be one of the main characters. And Griphook, the goblin we know from the books, could also be a main character as he has prior interactions with Harry. Another could be a young, rebellious goblin who wants to change the relationship between goblins and wizards and is the driving force behind the alliance.
Well, Harry Potter himself is likely to be one of the main characters. He has always been at the center of things in the original series, and in a great alliance, his leadership skills and courage would be crucial. Hermione Granger would also be there. Her intelligence and vast knowledge of magic would be invaluable for the alliance. Ron Weasley too, as he has shown loyalty and has his own set of skills.
It's hard to say without reading it, but it could be Harry Potter himself as the story is related to his family. Maybe there's a new villain who is trying to steal the family magic.
A young witch or wizard who discovers they have long - lost relatives in the wizarding world could be a main character. They would be on a journey to find and connect with these family members.
A member of the royal family could be a main character as well. For example, a young prince or princess who discovers their magical abilities or is drawn into the wizarding world. They would have to learn to balance their royal duties with their newfound magical identity. And then there could be a wizard or witch who acts as a guide for this royal person, like a Hogwarts professor or an Auror.
Obviously, Harry Potter himself could be one of the main characters. He has a lot of untapped potential in terms of family magic that could be explored. For example, delving deeper into the magic he inherited from his parents.