Besides Danny, the main characters could include some of the friendly ghosts from the Ghost Zone. They could be like Danny's support system in this new motherhood journey. Also, the school bully Dash might be in the story. He could start off making fun of Danny but then gradually come to understand and respect Danny's new role. And there could be a mysterious ghostly figure that either helps or hinders Danny in his newfound motherly duties.
Obviously, Danny Phantom and Dan Phantom are the main characters. Danny is the original form, a heroic character, and Dan is his more evil and powerful transformation.
It could be Sam and Tucker. Since Danny has become a villain, his former friends would likely try to stop him. They would be the main antagonists from Danny's point of view now. They would use their knowledge of Danny and their own skills to try and bring him back to the good side.
Well, perhaps Danny Phantom, in this fanfiction, could be turned into a mother due to some magical mishap. Maybe he has to deal with the daily tasks of motherhood like taking care of 'phantom kids' who have unique powers. He might struggle to balance his own heroic duties with the newfound maternal responsibilities.
Obviously, Danny Phantom is the main character as it's about his transformation into Dan. His friends like Sam and Tucker would also be important characters. They would likely play a role in trying to either stop the transformation or help Danny deal with the consequences. And of course, his ghostly foes might also be involved, as they could either take advantage of his situation or be affected by the power shift if he becomes Dan.
Well, Danny's friends like Sam and Tucker could be involved. Maybe they accidentally get pulled into the time travel adventure too. Danny's parents, Jack and Maddie, could also be part of it. They might be chasing after Danny and Ember through time, thinking they are up to no good. Another character could be Vlad Masters. He could sense the time travel disruption and try to use it to his advantage, perhaps by traveling to a time when he could gain more power or change the past to make Danny's life more difficult.
Tucker would be a great addition. He could provide some comic relief with his tech - savvy ways. He might also be able to upgrade their ghost - fighting gear. Sam is another good one. She could offer her unique perspective on things, especially when it comes to environmental and ethical issues. And of course, Vlad could be included as the antagonist. His devious plans and power - hungry nature always make for an interesting conflict.
The Guys in White could be the main antagonists. If Danny becomes evil, they might see this as their chance to finally capture and experiment on him. They would be constantly chasing him, which would make Danny see them as the main obstacle in his new evil plans, and thus they would be the antagonists in the story.
In this fanfiction, the Observants could be the main antagonists. They are used to being the ones in control and guiding the events in the Ghost Zone. Danny becoming a god would disrupt their carefully crafted order. They would try to undermine his power and influence, perhaps by spreading rumors among the other ghosts that Danny is going to bring chaos. Also, certain groups of rogue ghosts who enjoy causing mayhem in both the human and ghost worlds would oppose Danny. They would be afraid that he will stop their fun and impose strict rules with his new godly powers.
His friends Sam and Tucker could be his allies. They've always been there for him and would likely support him in his new role as the Ghost King.
Vlad Masters could be a great secondary antagonist. He might see the chaos caused by Undergrowth as an opportunity to achieve his own goals, perhaps by trying to manipulate Undergrowth or using Danny's preoccupation with the plant - based villain to his advantage.