In terms of personality, Danny may become more stoic and wise. Since archangels are ancient and full of knowledge, Danny could start to show a deeper understanding of the universe and the forces at work within it. He may also develop a more solemn and respectful attitude towards all forms of life, as archangels are often seen as protectors of all creation.
He might become more noble. Archangels are often seen as noble and pure beings, so Danny could take on these traits. His sense of justice could become more absolute.
The concept of good and evil could also be redefined. In the regular Danny Phantom series, he fights against ghosts with his own set of moral guidelines. But in this fanfiction as an archangel, he might be more directly involved in the cosmic battle between ultimate good (represented by the archangels) and ultimate evil. His actions and decisions would then carry a much greater weight in the grand scheme of things.
Danny's relationships change drastically. He distances himself from his friends and family. He no longer values their opinions or support. Instead, he might see them as obstacles or even threats. His friendships with Sam and Tucker are strained as he starts to engage in activities that they find morally wrong, like using excessive force on other ghosts or humans who get in his way.
The plot could change in terms of her love interests. Instead of the typical male - led romantic arcs, there could be new female - centered ones. For example, she might have a different type of relationship with a male character, where she takes the lead more often.
He often becomes more withdrawn. Instead of being the outgoing hero, he might shy away from fighting ghosts due to the abuse he's suffered, which has led to his depression. His self - confidence is shattered, and he may doubt his abilities.
However, there could also be a glimmer of the old relationship. Maybe deep down, Evil Danny still has some feelings for Sam, and she tries to use that to her advantage. But it's a dangerous game, as Evil Danny could easily turn on her. This complex mix of emotions and power dynamics would make their relationship very different from what it was when Danny was good.
His personality might become more innocent. As a kid, he's not as cynical as when he was a teen. He might be more open - minded and trusting.
He becomes more responsible. He can't just go on ghost - fighting sprees like before. He has a whole kingdom to think about.
In this fanfiction, it could be that Danny Phantom meets a Danny Phantom from a parallel fan - made story. At first, they don't trust each other. But as they learn more about each other's worlds, they realize that there are some common elements that are being threatened. It could be that a powerful ghost is trying to rewrite all the fanfic universes related to Danny Phantom. So, they must combine their strengths and knowledge to stop this from happening.
Well, at first, their relationship was more of an enemy - turned - something - else situation. Once married, they would be more protective of each other. Danny, who was always the hero, would now have Ember as his equal partner. Ember, who was once a bit of a troublemaker, would become more of a support for Danny. Their relationship would also be more public, and they would have to face the opinions of others, which would change how they interact with the outside world and with each other.
One possible story could be that Danny is facing a new and extremely powerful ghost. He needs help from his friends Tucker and Sam. Maybe they need to find a rare artifact to defeat this ghost. They could start by researching in the local library, looking through old ghost lore books. Tucker uses his tech skills to try and track down any leads on the artifact's location, while Sam uses her knowledge of the occult.