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.
In a 'yusei becomes dark signer fanfiction', perhaps Yusei discovers a hidden part of his past that links him to the Dark Signers. He could find out that his family was somehow involved with the dark forces in the past. This revelation shakes his sense of self. As a result, he decides to embrace the role of a Dark Signer to fully understand his heritage. However, he soon realizes that the power comes with a price, and he has to fight against the corrupting influence of the dark energy while still trying to achieve his own goals.
Some common themes in Dark Signer Yusei fanfiction could be redemption. Since the Dark Signers are often seen as antagonists, fanfics might explore their journey towards redemption. Another theme could be power struggles. Yusei, being a powerful duelist, might face intense power battles against the Dark Signers in these stories. Also, friendship can be a theme as Yusei tries to understand the Dark Signers and maybe even form an unlikely bond with them.
Crow Hogan is often a popular character to include. He's Yusei's friend and his presence can add more depth to the story. Another one could be Jack Atlas. His rivalry with Yusei and his strong personality make him a great addition. Also, Akiza Izinski might be included as she has her own powers and a connection to Yusei.
A really interesting fanfiction I came across was about Yusei's encounters with other Dark Signers before fully becoming one himself. It showed how he was gradually influenced by the dark forces. In some fanfictions, the author might focus on Yusei's new deck as a Dark Signer. It could have cards with darker themes and more powerful but dangerous effects. These fanfictions can offer a different perspective on Yusei's character compared to the original series.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own (AO3). These platforms have a large collection of Yu - Gi - Oh fanfictions, and you can specifically search for ones related to Dark Signer Yusei.
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.
One interesting concept could be the origin of the Dark Signers. Maybe they were once normal duelists who were corrupted by a powerful and ancient force. Another could be their unique connection to the spirit world, like how they can summon darker versions of monsters. And also, the idea of their ultimate goals, whether it's about ruling the dueling world or something more sinister related to the secrets of the cards.
A prevalent theme in 'yugioh dark signer fanfiction' is the battle between good and evil. Even though the Dark Signers are on the 'dark' side, some stories show them having a chance at redemption, blurring the lines between good and evil. There are also themes related to sacrifice. Some Dark Signers might have to sacrifice their powers or relationships in order to achieve a certain goal, like saving someone or changing their own destinies.
If Naruto became a succubus in fanfiction, his relationships would change significantly. His friendship with Sasuke, for instance, would face a new dynamic. Sasuke, who is often focused on power, might view Naruto's new form as either a threat or a potential source of power. Naruto's relationship with Sakura could also be affected. Sakura might initially be shocked and unsure how to interact with him. She could be worried about Naruto's new nature and how it could impact his well - being. And Naruto's relationship with Kakashi would require some adjustment. Kakashi would need to understand Naruto's new abilities and how to help him control them while still maintaining their mentor - mentee bond.
Their relationships would become very complicated. For example, romantic relationships would be difficult. Their partner would age while they stay the same. It could lead to a lot of heartbreak and the OC might have to distance themselves to avoid seeing their loved one wither away.