The Arrow is sure to be a main character. In addition, Hawkeye would be a crucial character in this fanfiction. Since they both are archers, there could be a lot of interaction between them, like competing or collaborating in archery - related tasks. And of course, Captain America with his leadership skills would also be among the main characters to lead the team that now includes the Arrow.
Well, perhaps a plotline could involve the Arrow teaching some of the Avengers his unique combat techniques. For example, showing Hawkeye some new archery tricks. And in return, the Avengers introduce him to their advanced technology for upgrading his arrows.
Obviously, the Avengers members like Iron Man, Captain America, etc. And the Warrior 3 which include Fandral, Hogun and Volstagg.
Obviously, Percy would be one of the main characters. There would also likely be some of the well - known Roman demigods like Jason. Since Percy is joining the Romans, Jason could be a key figure in helping him integrate, or perhaps there could be some initial tension between them. Reyna might also be an important character as she is a leader in the Roman camp and would have a say in whether Percy can join or not.
Obviously, Percy will be one of the main characters. And Artemis, as the leader of the Hunters, is bound to play a major role. Also, some of the other well - known Hunters like Thalia might be important characters in the story.
Obviously, Bella is one of the main characters. And then there are the Volturi leaders like Aro, Caius, and Marcus. They would play important roles as they are the ones in charge and would have a say in whether Bella can truly join them or not. Also, the Cullens might still be part of the story, especially Edward, as his relationship with Bella could be a factor in her decision to join the Volturi.
In addition to the well - known Avengers, there might be some new or less - known characters. Maybe some characters from Iron Man's rogues' gallery could show up. Or perhaps a new hero that is related to Iron Man's technology in some way. There could also be some side characters that are important for the development of the story, like Pepper Potts who has a close relationship with Iron Man.
Obviously, Harry Potter himself would be the central character. Then, Voldemort would be a major figure as he is the main representative of the Dark Side. Bellatrix Lestrange could also play an important role as she is one of Voldemort's most loyal followers. She might be the one to initially tempt Harry or guide him into the ways of the Dark Side.
Obviously, Harry Potter and Voldemort are the main characters. Harry, who makes the unexpected choice to join Voldemort. And Voldemort, who welcomes Harry into his ranks, perhaps with an ulterior motive.
Obviously Percy is one of the main characters. There might also be the leaders of the chaos army. They could be some powerful and mysterious figures that Percy has to interact with. And perhaps some of Percy's old friends might also play a role, either trying to bring him back or having to face him as an enemy now.
Obviously, Batman would be one of the main characters. And of course, the other members of the Justice League like Superman, Wonder Woman, Flash, Green Lantern, etc. would also be important. There might also be some villains that are central to the story, such as Lex Luthor who could be plotting against the newly - formed alliance of Batman and the Justice League.