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.
In some 'dark side Ahsoka fanfiction', she could be lured to the dark side by a powerful Sith Lord. This Sith Lord might promise her greater power and knowledge. As a result, Ahsoka would abandon her Jedi teachings and embrace the chaos and power of the dark side. She might then form her own dark side following and try to take over certain parts of the galaxy.
There could be a 'dark side Ahsoka fanfiction' where Ahsoka is influenced by the dark side due to a great tragedy. Maybe she loses someone very close to her and blames the Jedi Order for it. This leads her to seek revenge and in the process, she succumbs to the dark side. She then uses her unique connection to both the light and dark side (from her time with Anakin) to create a new and dangerous form of combat that combines elements of both.
One plot idea could be that Anakin, already on the dark side, tries to convince Ahsoka to join him. He shows her the power that the dark side can offer, like how quickly she could gain the ability to defeat her enemies. But Ahsoka is conflicted as she still has a strong bond with the light side teachings of the Jedi.
A possible plot could involve Ahsoka being betrayed by someone she trusts deeply within the Jedi or among her friends. This betrayal could be so severe that it pushes her over the edge, and she turns to the dark side for revenge. She then uses her newfound dark side powers to seek retribution against those who wronged her.
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 interesting Dark Side fanfiction could be one that delves into the backstory of a villain. For example, in a Star Wars - related Dark Side fanfiction, it might explore how a young Sith apprentice was recruited and trained. It could show their internal struggles with the dark side's temptations.
Maybe Ahsoka gets captured by a dark side cult. They try to convert her by showing her their version of 'justice' through the dark side. They expose her to their cruel and efficient ways of dealing with enemies, which makes her question her Jedi teachings. However, she eventually realizes that their 'justice' is just tyranny in disguise.
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.
In some Dark Side Yoda fanfiction, Yoda could be a time - traveler who goes back in time and turns to the dark side in the past. This changes the entire course of the Star Wars timeline. He might prevent Anakin from being born or he could start a new Sith order much earlier, causing chaos across the galaxy for centuries.
One interesting 'dark side Luke' fanfiction could be about him leading a Sith cult. In this story, Luke uses his knowledge of the Force in a twisted way, recruiting followers and causing chaos across the galaxy.