In addition to Danny and his immediate circle, there could be other characters from the Danny Phantom universe. For example, Valerie Gray. If she discovers Danny's identity, she might have a complex reaction. On one hand, she's been hunting ghosts, but on the other, Danny has also been protecting the town. So, her role in the fanfiction could be very interesting, especially in terms of how she interacts with Danny after the identity reveal.
Tucker Foley and Sam Manson are also often main characters. They are Danny's best friends in both his human and ghost - fighting life, so they play important roles in many fanfictions. They might be helping Danny deal with the challenges of his dual identity or getting involved in his battles against ghosts.
Obviously, Ladybug and Chat Noir are often central. Marinette, who is Ladybug, and Adrien, who is Chat Noir. Also, Hawk Moth as the main villain often plays a role in these fanfictions when the identity is about to be revealed or has been revealed, as his actions can be related to this big event.
There could be some ghost characters involved too. For instance, Vlad Masters might show up in the fanfiction. He could be either jealous of Danny's new ability with the claws or try to use it to his own advantage. Another character could be Skulker. He might see Danny's claws as a new trophy to hunt for, which would lead to some exciting chase scenes in the fanfiction.
Danny himself can be a main character in such fanfiction. His relationship with his mother, Maddie, can be explored from the perspective of maternal instincts. For example, Maddie's instincts kicking in when Danny is in a particularly dangerous situation with his ghostly foes.
Danny is the central character as it's his secret that is being revealed. His friends Sam and Tucker are also main characters. Sam is the goth girl who is always by Danny's side, and Tucker is the tech - savvy friend. If the story involves Danny's love life, then any potential love interests could also be main characters. And we can't forget about Danny's ghostly enemies, like Vlad Plasmius. If the secret is revealed during a battle with him, he would be a significant part of the story as well.
Well, apart from Danny, Sam and Tucker, there could be other characters from the Danny Phantom universe. For example, Valerie Gray, who has her own vendetta against ghosts. When Danny reveals his identity, she might have a really interesting reaction. She could either see him as a threat or realize that he's not as bad as she thought. And then there are the teachers at school. They might notice some changes in Danny after his identity is revealed and start to suspect something strange is going on.
Another interesting point could be Danny's own internal struggle. He has been living a double life, and now that it's all out in the open, he might have to re - evaluate who he is. Does he still want to be a hero? How will he deal with the public's reaction, if the public in the fanfiction world also gets to know about his identity? It could lead to a great character - development arc for Danny in the fanfiction.
The main character is Danny Phantom himself. He's at the center of the story as he discovers and wields the secret weapons. Then there's Vlad Masters. He could be a key character in some fanfictions as he might be after the same secret weapons as Danny, either to use them for his own gain or to stop Danny from having them. Danny's parents also play a role, as their ghost - hunting knowledge and equipment could be related to the secret weapons in some way.
In some fanfictions, Danny's family members can be involved as well. His sister Jazz might be there to support him emotionally or to try and stop him from making a dangerous sacrifice. His parents, who are ghost hunters, could also be part of the story. Their relationship with Danny and their views on his actions can add depth to the fanfiction.
One interesting idea could be how Danny's friends react when his identity is revealed. They might be shocked at first but then quickly adapt to support him. Another could be the reaction of the villains. They may become more determined to defeat Danny since they now know who he really is.