It could also have an impact on Vader himself. If he tortures Ahsoka, it might stir up some long - buried emotions or memories within him. Maybe he sees a bit of himself or Anakin in her, and this act could either make him more conflicted about his path in the dark side or make him double down on his evil ways to suppress any feelings of remorse or regret.
One possible consequence could be a deepening of the conflict between the light and dark sides within the Star Wars universe of the fanfiction. It might lead to Ahsoka having a stronger resolve to fight against the dark side, or it could potentially push her closer to the edge of falling to the dark side herself out of desperation or anger.
The Clone Troopers she was close to could be left without her leadership. This might lead to some of them struggling to adapt to new commanders or having a dip in morale. In some fanfictions, her leaving could also cause a stir in the Senate, with some senators using it as an example of the Jedi's instability.
A really exciting plotline might involve Ahsoka getting trapped in Vader's memories. She has to navigate through his past, seeing his fall to the dark side and his relationship with Anakin Skywalker. This could lead to some very emotional and thought - provoking moments as she tries to understand him better and perhaps find a way to save him.
In a fanfiction, Darth Vader might finally face his past with Ahsoka. Maybe he would have moments of hesitation in their battles, as memories of their time as master and apprentice resurface. This could lead to an internal struggle within Vader, torn between the Dark Side and his former self.
In some fanfiction, there could be a plot where Ahsoka and Vader's battles are not just physical but also mental. They engage in a battle of wills across the Force, with Ahsoka trying to break through Vader's dark side conditioning and Vader trying to corrupt Ahsoka. This creates a very tense and complex dynamic between them.
One of the most dramatic moments could be when Ahsoka first realizes she's facing Vader, knowing he was once Anakin. It's a moment full of shock and disbelief. Another could be when they clash lightsabers for the first time, the sparks flying as the power of the Force is felt around them.
One scenario could be that Darth Vader discovers Ahsoka is still alive and is conflicted between his Sith loyalty and his past connection with her. He might secretly try to protect her from other threats in the Empire without revealing his identity.
Ahsoka could resist through her strong connection to the Force. She might use it to block out the pain, both physically and mentally. By centering herself and drawing on the light side of the Force, she can create a sort of mental shield against Vader's attempts to break her.
In a fanfiction battle between Ahsoka and Vader, it's really hard to say who would win. Ahsoka is highly skilled and has a deep connection to the Force. But Vader is extremely powerful with his Sith abilities. It could go either way depending on how the writer wants to portray it in the fanfiction.
In fanfiction, their duel could be more about psychological warfare. Ahsoka might use her knowledge of Anakin to try and get into Vader's head, making him question his loyalty to the dark side. For example, she could bring up memories of their time as master and apprentice. This would add a layer of complexity not always seen in the official duels.
The relationship between the Empire and the Rebel Alliance could also be affected. The Rebels might see Luke's new position as an opportunity to infiltrate and change the Empire from within. On the other hand, some in the Empire may try to use Luke as a bargaining chip to negotiate a truce or peace deal with the Rebels, which would completely change the nature of the galactic conflict.