Danny is the primary one who is tied up. But other characters from the Danny Phantom universe could be involved. The Box Ghost could be there as a sort of comical side character. He might be accidentally caught up in the situation. There could be a group of ghostly allies that Danny has made over the course of his adventures, and they could be trying to free him. And let's not forget the teachers at Danny's school, like Mr. Lancer. They could potentially get involved in some unexpected way, like if the tying - up incident occurs at school.
Well, the main character is Danny. Then there are his parents, Jack and Maddie Fenton. They could accidentally be the cause of Danny getting tied up if they mistake him for a more dangerous ghost. Jazz, Danny's sister, could also play a role. She might be the one to first notice Danny's disappearance and start looking for him. There could also be some new characters created specifically for the fanfiction, like a powerful new ghost that ties Danny up to prove a point.
Danny and Kim are often paired up. Their different skill sets make for an exciting combination. Danny with his ghost - fighting abilities and Kim with her acrobatic fighting skills and access to various gadgets.
Obviously Danny himself is still a very popular character. But in grown - up fanfiction, characters like Sam and Tucker also get more in - depth development. Sam might be involved in some kind of environmental or supernatural activism as an adult. Tucker could be using his tech skills in a big - time corporate or research setting related to the ghostly realm.
Obviously, the main character would be Danny Phantom himself, but in two different forms or versions. One would be the original Danny Phantom from the canon source, and the other would be a version created by the fanfiction. There might also be his friends like Sam and Tucker who could play important roles in helping the two Dannys understand each other and deal with any issues that arise from their meeting.
Sam is also quite popular. Her goth - like personality and her strong - willed nature make her an interesting character. In fanfiction, she can be portrayed in different ways, like being even more involved in Danny's ghost - fighting activities.
One plot idea could be that Danny Phantom is tied up by a new, powerful enemy who has discovered a way to nullify his ghost powers temporarily. His friends then have to go on a quest to find the antidote or a way to break the bonds. Another could be a misunderstanding where the town thinks he's causing trouble and ties him up, but he has to prove his innocence.
In addition to the ghosts, there might be some human characters that are important in the 'phantom city danny phantom fanfiction'. They could be Danny's friends or family members who get involved in the events of the Phantom City. Their reactions to the supernatural world and their interactions with Danny and the ghosts would add an interesting dynamic to the story.
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.
Obviously, Danny and Dan themselves are very popular. Danny as the main hero and Dan as his dark and complex counterpart are central to many stories. Jazz, Danny's sister, is also popular as she can provide a different perspective and often gets involved in Danny's ghost - fighting adventures in fanfiction.
He could start to lose strength. Food provides the energy needed for normal human activities, and even though Danny has ghost powers, his human side still needs proper nourishment. Without eating, he might find it harder to fight ghosts effectively as his physical strength wanes.
Sam and Tucker are also quite popular. They often play important roles in helping Danny deal with his TG (transformation - related) situations. Sam might use her goth knowledge or her strong will to assist Danny, while Tucker uses his tech - savvy skills.