Well, Henry is the obvious start. Then there's Piper, his sister. She could either be proud of her brother or be angry that he kept this big secret from her. The villains like Dr. Minyak would be involved as they would try to take advantage of the situation. And the superhero community in the Henry Danger world, if there is one, could also be involved. They might have their own rules about secret identities and Henry's revelation could put him at odds with them.
Henry is the main one for sure. Ray, his mentor, would also be a big part of it. Ray might have to deal with the fallout of Henry's identity being out in the open, like handling the media and the public's reaction. Also, Henry's family could be involved. His parents might be worried about his safety now that his identity is known. And then there are the other minor characters from the show who could either support Henry or turn against him depending on the plot.
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.
Ray could also be a main character in such fanfictions. As Henry's mentor in the show, he might play a role in dealing with the pregnancy situation, perhaps providing guidance or getting into some comical misunderstandings related to it. Jasper could be another character involved, maybe adding some humor to the story with his unique personality.
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.
Typically, it could be one of the female characters from 'Henry Danger' like Charlotte. Since she is a smart and capable character, a pregnancy plot for her could be really interesting as she tries to manage it while still being part of Henry's crime - fighting world.
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.
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.
Well, perhaps a plot where the whole city has mixed reactions. Some see Henry as a hero despite the secrecy, while others think he's been lying all along. And then there could be a sub - plot where Henry has to deal with a new superhero who is jealous of his popularity even with the identity issue.
Obviously, Danny Phantom himself is the central character. His friends like Sam and Tucker are also often involved. They play important roles in how Danny deals with his revealed identity, either by providing support or getting into trouble because of it.
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.