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.
One possible storyline could be that Danny is pushed to the edge by constant bullying at school and the stress of hiding his ghost powers. This leads him to gradually embrace the darker side of his powers and become Dark Danny. For example, Dash's continuous taunts and the school's overall negative attitude towards him make him lose faith in humanity.
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.
In some fanfictions, Danny's mom might find out when she accidentally witnesses Danny transforming into his ghost form. Maybe she walks in on him at a crucial moment.
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.
He becomes more responsible. He can't just go on ghost - fighting sprees like before. He has a whole kingdom to think about.
His powers could become more ice - based. Instead of the normal greenish - blue energy, his blasts might turn a frosty white. His ability to fly could also be affected, with a cold trail following him as he moves through the air.
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.
In Danny Phantom fanfiction, heat might affect Danny in various ways. For example, his ghost powers could be weakened as some fanfics might play with the idea that extreme conditions like heat disrupt the balance of his human - ghost hybrid state. It could also make it harder for him to stay invisible or intangible as his energy is being sapped by the heat.
He often becomes more withdrawn.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.