A possible plot could be that there is a ghostly music competition in the Ghost Zone. Danny enters to stop some sort of dark plot related to it, and Ember is also a participant. Along the way, they form an alliance and their relationship blossoms as they work together to uncover the mystery behind the competition.
Well, clearly Danny Phantom is a key character. He's constantly in the middle of things, trying to keep the balance between the human world and the Ghost Zone. Ember, on the other hand, with her fiery red hair and her musical powers, is another main character. In this fanfiction, their interactions are what drive the story forward, whether it's them fighting against each other at first or eventually working together.
One idea could be that Danny and Ember are forced to team up against a new powerful ghost enemy. During their time together, they start to see different sides of each other and feelings begin to develop. Another could be a time - travel plot where Danny goes back in time and meets a younger Ember, changing the course of their relationship. Or perhaps they get trapped in a dimension where they have to rely on each other for survival, and that closeness leads to love.
One idea could be that Danny and Ember accidentally travel back to the founding of Amity Park. They could witness the early settlers dealing with strange ghostly phenomena and have to figure out how to not disrupt the timeline while also helping the settlers. Another plot could be that they travel to a future Amity Park that is overrun by a new type of ghostly threat, and they bring back knowledge to prevent it in their own time. Or they could travel to a time when Danny's parents were kids and see how their obsession with ghosts started.
One interesting 'Danny Phantom Danny and Ember' fanfiction could be where Danny and Ember team up to fight a new, powerful ghost that threatens both the human world and the Ghost Zone. They start off as reluctant allies but gradually come to respect each other's powers.
One idea could be a story where Danny and Ember have to team up to defeat a new ghostly threat that is causing chaos in Amity Park. This could involve Ember using her music powers in new ways and Danny having to rely on her more than he expected.
A fanfiction could be set in an alternate universe where Skulker and Ember are the heroes and Danny Phantom is the villain. It would be interesting to see how their personalities and powers would be different in this reversed role situation.
One interesting fanfic concept is that Danny and Ember are forced to work together to save the Ghost Zone from a powerful, ancient evil. They must combine their powers and knowledge. Danny's scientific knowledge about the Ghost Zone and his powers, along with Ember's knowledge of the more mysterious and musical aspects of the Ghost Zone, could lead to a great adventure and a deepening of their relationship.
There might be a fanfiction where Ember has a change of heart and decides to help Danny protect his loved ones from other malicious ghosts. It could explore her character development and how she overcomes her own self - centered nature. For example, she could start to care about Danny's friends and family, and this newfound care could lead to some really heartwarming and action - packed scenes.
Another idea is a story about Danny and Star accidentally swapping powers. Danny has to deal with Star's magic while Star tries to control Danny's ghost abilities. It could be a comical yet challenging situation for both of them as they learn to adapt.
One idea could be a crossover where the characters from Danny Phantom and LoliRock team up to fight a common supernatural threat. Maybe the ghosts from Danny's world are being influenced by a dark magic from the LoliRock universe, and they have to combine their powers to stop it.