Well, Danny is essential. Then there are the ghosts that Danny often battles, like Technus. He could be causing some sort of technological mayhem in the Ghost Zone. Spectra, the ghost who feeds on negative emotions, could also be a great addition as she might be up to no good in the Ghost Zone. Jazz, Danny's sister, could also be included if she somehow finds a way into the Ghost Zone. Maybe she's trying to rescue Danny or is on a scientific exploration of the zone. And of course, the Fright Knight, who could be guarding some important location or artifact in the Ghost Zone.
Obviously Danny himself is a must - include. Then there's Vlad Plasmius, his archenemy, who could have some devious plans in the Ghost Zone. Sam and Tucker, Danny's human friends, can also be included, maybe they get dragged into the Ghost Zone somehow. And some of the more well - known ghosts like Skulker or Ember could add a lot of action and drama to the fanfiction.
Potential characters could include powerful ghost lords that Danny has to deal with. These could be ancient and very powerful ghosts who see Danny as a threat or an opportunity. There might also be some half - ghost characters like Danny, but with different origins. They could be his allies or enemies. And let's not forget the minor ghosts that populate the Ghost Zone, they could add flavor to the story, either by helping Danny or causing trouble for him.
Well, Danny is obviously one of the main characters. He's the King of the Ghost Zone in this fanfiction, so he's at the center of most of the action. Sam and Tucker are likely to be important characters too. They often support Danny in his adventures in the regular Danny Phantom series, and in this fanfiction, they could be helping him rule or deal with problems in the Ghost Zone.
Obviously, Danny himself is a must - include. His friends Tucker and Sam are also very popular characters to add. They can provide support, comic relief, and different perspectives. Vlad Masters is another key character. His complex relationship with Danny and his own half - ghost nature can add a lot of drama to the fanfiction. Then there are the ghosts like Johnny 13 and Kitty, whose unique personalities and powers can create interesting storylines.
Obviously Danny himself is a must - include. But also Sam and Tucker are great characters to have. They've been with Danny through everything and can add some great human - side to the fanfiction. Valerie could also be included. She has her own complex relationship with Danny and the whole ghost - fighting thing. And of course, there are the ghosts like Vlad. His rivalry with Danny can create a lot of interesting storylines.
Danny himself is obviously a must - include character. His friends like Tucker and Sam can also be great additions. They could get involved in the Infinite Realms adventures in some way, like helping Danny from the human side or getting accidentally pulled into the Realms.
Sam and Tucker are also great characters to include. They are Danny's best friends and can provide support, comic relief, or get into trouble themselves, adding more layers to the fanfiction.
Power struggles are a common theme. Since Danny is the Prince of the Ghost Zone, there are always other ghosts who want to take his position. This creates a lot of drama and action in the fanfictions.
Obviously Danny himself is a must - include. Then there's Sam and Tucker who could visit the Ghoul School with Danny. Among the ghouls, Spectra is quite popular as she has a very interesting personality. Also, the headmistress of the school can be a great character to write about as she has authority and can create interesting plot points.
There could be a rogue ghostly entity that was once a friend or ally of Danny's family. This entity might feel betrayed by Danny's family for some reason and now wants to take revenge on Danny. Since Danny was raised in the Ghost Zone, he is an easy target for this entity. This antagonist could manipulate the other ghosts against Danny and create all sorts of problems for him as he tries to figure out his place in the Ghost Zone and the human world.
Well, aside from Danny, Sam Manson is a very popular character to include. She's not only Danny's friend but also has a bit of a romantic tension with him at times. Tucker Foley is another great addition. His technological know - how adds an interesting element to the stories. And of course, the ghost dog Cujo can be a fun and cute addition. He's small but can be very fierce when needed. Also, Valerie Gray, the ghost hunter, can bring in a whole new dynamic as she's both an ally and sometimes an enemy to Danny.