Carly's relationships would also change. Her friendships could be strained as her new Dark Signer identity scares some of her friends. However, she might also attract new allies who are either also Dark Signers or those who see potential in her for redemption. As she navigates these new relationships, her character would grow and adapt to her new circumstances.
There are many interesting fanfictions on this topic. Some might explore Carly's transformation into a Dark Signer and how it changes her relationships. For example, it could show her relationship with Jack becoming more complex as she is now on the 'dark side'.
One plot idea could be Carly's journey as a Dark Signer. Maybe she discovers a hidden power within her Dark Signer status and has to decide whether to use it for good or be consumed by the darkness. For example, she could use it to protect her friends from other more malevolent forces in the Yu - Gi - Oh universe.
One possible plot could be Carly's initial confusion and fear when she first becomes a Dark Signer. She might not understand what's happening to her and tries to resist the dark power at first.
Romantic relationships would also be affected. If Yusei had a love interest, she or he would be heartbroken and confused. They might try to reach out to Yusei and bring him back from the dark side. But Yusei, as a Dark Signer, might push them away, believing that his new path is one he has to walk alone. His relationships with his mentors or older figures in his life would also turn sour, as they would see him as having strayed from the right path.
His character would become more cynical. He'd lose his naivete and optimism. Instead of believing in the good of people, he'd see only their flaws.
Naruto's character would likely become more cynical. His abandonment by family would shatter his once - positive view of the world. He might start to see the world as a cruel place where only the strong survive, leading him to embrace his dark side to gain power.
Naruto's character would become more cynical. He'd lose his usual optimism and be more distrustful of others. His sense of justice might be warped, as he now feels that he has been wronged. He could start to see power as the only thing that matters, rather than the bonds he once cherished.
To write Akiza accurately, remember her complex personality. She is strong - willed but also has a vulnerable side. Don't forget her love for dueling and how her Dark Signer powers are a part of her.
In some fanfictions, Dark Sonic starts off as a purely evil force. But as the story progresses, he begins to regain some of his old self. Maybe through the love and friendship of his comrades, he slowly comes back to his senses.
Another aspect of his development in fanfiction is his relationship with his family. In some stories, he might reconcile with his father, Goku, or his mother, Chi - Chi. This can be a major turning point in his character arc, as it can bring out the more human and emotional side of Dark Gohan that was perhaps overshadowed by his darkness before.