One aspect of Ahsoka in dark side fanfiction might be her change in appearance. She could start wearing darker robes and her lekku might even seem to have a more menacing look. Her fighting style would also likely change, becoming more aggressive and less about defense. Writers often explore how her relationships with other characters, like Anakin, would be affected. Anakin might be torn between trying to save her and seeing her as a threat.
Betrayal is a common theme. For example, she might be betrayed by the Jedi Order, which pushes her towards the dark side. Another theme is power. The allure of greater power, whether it's political or related to the Force, can be a factor in her fall.
One possible story could be that Ahsoka, after facing a series of great losses and betrayals, starts to be tempted by the Dark Side. Maybe she discovers some ancient Sith knowledge that makes her question her Jedi teachings. She could struggle with the newfound power it offers and the darker emotions it stirs within her, like anger and vengeance.
One possibility in fanfiction could be that Ahsoka is tricked into the Dark Side. Maybe an old enemy manipulates events to make her feel betrayed by the Jedi Order. This could lead her to explore the power of the Dark Side, believing it to be a way to seek justice on her own terms.
One interesting 'dark side Ahsoka fanfiction' could be about her being corrupted by an ancient Sith artifact. She might start to use her skills in a more menacing way, turning against her former allies. For example, she could use her lightsaber skills to hunt down Jedi who oppose her newfound dark side ideology.
Well, at first, they might seem closer as they are now both part of the same 'dark' world. But soon, the dark side's influence of greed and power - hunger would start to drive a wedge between them. Anakin, with his already tumultuous relationship with power, might try to dominate Ahsoka. Ahsoka, having been dragged into the dark side against her will perhaps, would resent Anakin for it. Their relationship would be a volatile mix of shared darkness and individual power struggles.
In some fanfictions, Ahsoka might save Anakin through the power of their strong bond. She could remind him of their shared memories, the good times they had together, and the Jedi values they once held dear. By appealing to his emotions and the part of him that was still good, she could potentially pull him back from the dark side.
The influence of a powerful dark side user who targeted her specifically. This user could manipulate her emotions, play on her insecurities and gradually turn her towards the dark side. They might offer her knowledge or power that she couldn't resist, slowly corrupting her view of the Force.
Ahsoka might be exiled from the Jedi Order for reasons she doesn't fully understand. In her solitude, she meets a mysterious figure who has ties to the Dark Side. This figure begins to teach her alternative ways of using the Force that are more in line with the Dark Side. Ahsoka, feeling betrayed by the Jedi, starts to consider these new teachings.
She might be tempted by the Dark Side if she discovers a hidden truth about the Jedi Order that she can't accept. So she turns to the Dark Side thinking it's a better alternative. For instance, if she finds out that the Jedi have been hiding some dark secrets about the Force, it could push her over the edge.