Gil - galad, the Elven king, is another main character. His elven wisdom and power were important in the fight against the enemy. His interactions with the human and dwarf leaders in the alliance would be a key part of the story, as they had to work together despite their differences.
As we know very little about the 'Alliance War of Thorns Story', the main characters could be a range of people. There might be a heroic general who leads the alliance into battle. There could also be a wise strategist who tries to navigate the complex political and military situations. And perhaps there are some characters from different factions within the alliance who have to overcome their differences to fight together.
It could be a group of young adventurers. For instance, a brave warrior, a clever mage, and a stealthy thief who form the core of the secret alliance.
It could be really interesting. Fanfictions often explore different aspects of the original concept. Maybe it focuses on the relationships between different characters during the war, like the alliances they form and the betrayals that might occur.
I'm not sure specifically as I haven't read it. But it's likely to have soldiers as main characters. They could be from different backgrounds, with different motives for fighting.
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.
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.
I'm not sure specifically as it depends on the fanfic. But it could be the leaders of the alliance, perhaps a human general or an alien diplomat.
One idea could be exploring the backstories of the minor characters in the War of the Last Alliance. Maybe there was a young soldier who had a secret love interest back home and his journey was not just about the war but also about getting back to her.
You could write about a love story set within the context of the war. For instance, two soldiers from opposing sides who fall in love. Their relationship would be filled with secrecy, danger, and moral dilemmas as they try to navigate their feelings while being part of the war.