Batman's allies such as Commissioner Gordon could be involved. Sometimes Batman might be angry at Gordon if he feels that the police force is not doing enough to support his fight against crime. Also, other members of the Bat - family like Batgirl could be part of the story. Their actions or decisions might trigger Batman's anger. For instance, if Batgirl decides to take on a powerful villain alone against Batman's advice.
The Riddler could be a character in batman angry fanfiction. His mind - games and puzzles could drive Batman crazy with anger, especially when they lead to the endangerment of innocent lives. And then there's Catwoman. Her ambiguous relationship with Batman can also be a source of his anger. For example, if she double - crosses him during a heist.
The gods would be involved. Zeus, Poseidon, or any of the other gods. If they make decisions that affect Percy negatively, like sending him on a dangerous mission without proper support, he'd be angry. Also, Clarisse could be in these stories. She and Percy have had their share of conflicts in the original series, and in a fanfic, she could do something to really tick Percy off, like stealing his thunder (figuratively speaking) in a battle or competition.
Obviously, Batman/Bruce Wayne himself is at the center. Alfred Pennyworth would be very involved as he has known Batman's identity all along and would likely be trying to protect it or deal with the consequences if it's revealed. Commissioner Gordon might also play a big role. He has a close relationship with Batman and would be affected by the revelation. Then there are the villains. The Joker could be one of the main villains in such a story, using the revelation to his advantage in some devious way.
Wonder Woman could also be involved. She might be caught in the middle, trying to stop the fight at first. But if she realizes that Superman is being a threat for some reason, she could side with Batman, or at least not interfere in Batman's attempt to defeat Superman.
Obviously, Batman/Bruce Wayne himself. His butler Alfred would also be heavily involved as he has always been there to support Bruce. Alfred would likely be trying to protect Bruce and keep his remaining secrets safe.
Obviously, Batman/Bruce Wayne himself is a central character. His life would be turned upside down by the revelation of his identity.
The Joker is a very likely character. He has a long - standing vendetta against Batman and might have finally found a way to almost kill him. He could be working with some other powerful villains or using some new, deadly weapon or toxin.
Luna could also be part of the story. She might be an eccentric aunt - like figure to Hermione's children, introducing them to her unique view of the wizarding world and strange magical creatures. Professor McGonagall could be a mentor figure for Hermione in her role as a mother, offering wisdom and guidance on how to raise magical children.
Obviously, Octavia herself is the central character. Her brother Bellamy is likely to be involved. He would probably be very protective of her and the unborn child. Clarke might also be part of the story, perhaps providing medical knowledge or just being a friend to Octavia during this time.
Well, obviously Juvia herself is the central character. Her partner would also be very involved. If it's in the context of Fairy Tail, Gray would likely be her partner in the fanfiction, as they have a strong relationship in the original series. Then there are their friends like Lucy, Natsu, and Erza. They would probably be there to support Juvia during her pregnancy, offer advice, or just be there for the big moments.
There could be new characters specific to the village where he becomes Kamikage. For example, some powerful shinobi clans within that village. Their leaders would be important as they could be Naruto's allies or opponents. Also, the previous Kamikage's advisors might still be around and play a role in guiding or challenging Naruto. Maybe an old sage - like figure who has deep knowledge of the village's secrets and helps Naruto understand and respect the village's heritage.