A young and clever maid in the service of one of the noble families in Queensgate could be a main character. She might be privy to a lot of secrets and use her wits to navigate the dangerous political waters. Maybe she overhears a plot against her master and has to decide what to do about it.
One interesting plotline could be the power struggles within Queensgate. Maybe different noble families are vying for control over the area, much like the larger power plays in Game of Thrones. This could involve political intrigue, backstabbing, and strategic alliances.
Often, there could be a young and idealistic character who leads the uprising. Maybe a bastard son or daughter of a noble house who has seen the injustice in the system. Another could be a former slave who has escaped and now wants to free all his fellow slaves. And there might be a maester who has been exiled from the Citadel for his radical ideas and joins the uprising.
Often, the Gravewalker themselves is a main character. They usually have a mysterious past and special abilities. There could also be characters from the original Game of Thrones series who interact with the Gravewalker. For example, Jon Snow might cross paths with the Gravewalker and they could form an alliance or be at odds. Daenerys could also be involved, perhaps seeing the Gravewalker as a threat to her claim to the Iron Throne.
It could be a new character created specifically for the fanfiction. This character might be an outcast from a noble house who receives the call and is thrust into the center of the power struggles in Westeros.
In some fanfictions, Jon Snow could be a central figure when combined with the angel elements. Imagine an angel bestowing upon Jon some new powers or knowledge that helps him in his fight against the White Walkers. And there could be a female angel character who has a special bond with Jon, guiding him not just in his battles but also in his personal growth as a leader.
Daenerys could be a main character. She has leadership skills and her dragons could be a huge asset in a war - like scenario inspired by WWI. Another could be Jon Snow. His experience in leading the Night's Watch and fighting the White Walkers could translate into him being a key figure in this fanfiction's battles. Tyrion Lannister would also be a likely main character. His intelligence and ability to strategize would be very useful in a complex situation like a WWI - style conflict in Westeros.
Myrcella is a young and somewhat naive girl at the start. She has grown up in a different environment compared to Trystane. Trystane, on the other hand, is more in tune with the Dornish ways. Their differences and similarities are what make their interactions in the fanfiction so interesting. They both have to navigate the complex political situation in Westeros that affects their relationship.
The main characters in 'the dead watch game of thrones fanfiction' are likely to be those associated with the Night's Watch. Given the name, we might expect to see characters like Ser Alliser Thorne, who was a prominent figure in the Watch. Also, if it follows the typical themes of the series, there could be some new recruits to the Watch who play important roles in facing the dead. They might have unique backstories and abilities that help them in the fight against the undead. And of course, we can't rule out the possibility of some cameo appearances from other well - known characters from the Game of Thrones world who interact with the Night's Watch during this 'dead watch' scenario.
Maybe there are some original characters created specifically for this fanfiction. These characters could be outcasts who are befriended by the wolves and then get involved in the power games of Westeros. They might have unique abilities or knowledge that make them important in the context of the story.
Most likely, there will be the traditional Stark family members. Ned Stark's children like Arya, Sansa, Bran, and Rickon could play significant roles. They might be joined by other Starks who were not as prominent in the original series but are given more spotlight in this fanfiction.