Broken characters matter as they offer opportunities for character development. Their flaws and traumas drive the plot forward and give the story a meaningful arc. Plus, they make the readers root for them to heal and find their way.
Naruto himself is the most obvious one. His love interests, like Sakura, could be involved. If Sakura were to reject Naruto's feelings harshly, it would break his heart. Sasuke could also play a role. If Sasuke were to do something that Naruto thought was a betrayal of their friendship, it would cause Naruto great emotional pain.
As I'm not familiar with the 'the broken ring novel', I can only speculate. There could be a protagonist who is on a quest related to the broken ring. This could be a young person full of curiosity, trying to figure out the story behind the broken ring. There might be an antagonist as well, perhaps someone who wants to keep the secrets of the broken ring hidden. And there could be a supporting character, like an old jeweler who provides some valuable information about the ring's origin and possible ways to fix it.
Sometimes, the fanfic author might introduce new characters. These new characters could be commoners who get caught up in the political intrigue of the broken throne. They could serve as a fresh perspective and add new layers to the story. For example, a young peasant who becomes an unlikely ally to the main character.
I'm not sure exactly as I haven't read the 'broken angels novel' myself. But typically in a novel with such a title, there would likely be the 'broken angels' themselves as main characters. They could be unique individuals with their own personalities, backstories, and goals.
I'm not sure as I haven't read the 'broken wings novel' specifically. But usually, in a novel, the main characters are those who drive the plot forward. They could be the ones with the 'broken wings' either literally or metaphorically.
Since I'm not familiar with this novel, it's difficult to say. But usually in a story about broken bonds, there would be characters whose relationships are affected. There might be a character who is the cause of the broken bonds and another who is trying to fix them.
I don't know the main characters as the name 'squad broken fanfic' doesn't give that away. It could be characters from an existing franchise that has a squad concept, like the Avengers in a Marvel - related fanfic, but without more details it's impossible to say for sure.
I'm not sure specifically as there are many novels that could potentially have 'broken trail' in the title. But usually, there might be a protagonist who is strong - willed. Maybe a lone traveler who is trying to navigate this broken trail, either literally or metaphorically.