A really exciting moment could be when Ahsoka and Vader engage in a battle of wits as well as a physical battle. For example, Ahsoka might try to appeal to the Anakin still inside Vader, which could cause a moment of hesitation. Or Vader could taunt Ahsoka with memories of her past failures. The build - up to the final blow, whether it's Ahsoka's strike or Vader's, with all the emotions and power on display, would also be an extremely exciting moment in a fanfic.
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.
In a fanfic, it's really up to the writer. However, considering their abilities, Vader is extremely powerful with the Force, but Ahsoka is very agile and has unique fighting techniques. If Ahsoka can use her speed and agility to her advantage, she might be able to outmaneuver Vader. But Vader's brute strength and experience in combat are also not to be underestimated.
Well, a cool plot might be that Ahsoka gets trapped in a Sith - created illusion world by Vader. In this world, she has to face her past traumas and fears related to Anakin's fall. Meanwhile, Vader is conflicted as he watches her struggle, memories of his past with Ahsoka resurfacing. Or there could be a story where they both are on a mission to retrieve a powerful Jedi/Sith artifact, and their paths cross in a race against time.
One of the most memorable moments is when he reveals his true identity to Luke Skywalker, saying 'I am your father.' This moment completely changed the course of the Star Wars story. Another is his epic lightsaber duels, like the one with Obi - Wan Kenobi on the Death Star. His first appearance in the original Star Wars movie, with his imposing figure and deep breathing, is also very memorable.
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.
One way to further explore their relationship is through the Force. Since they are both strong in the Force, they could sense each other's emotions and intentions from a distance. For example, Vader might feel Ahsoka's determination to stop him, and it could remind him of her as a young Padawan. Also, a story could be written where they communicate through the Force without actually meeting, sharing memories and feelings about their past together.
One of the most memorable moments is when Darth Vader single - handedly took on a group of bounty hunters who thought they could capture him. He used his lightsaber skills and the Force to effortlessly defeat them all, leaving a trail of destruction in his wake.
Vader is also a standout. Fanfiction can delve deeper into his internal struggle between the remnants of Anakin and the all - consuming power of the dark side. His encounters with Ahsoka bring out different facets of his character, showing his ruthlessness but also the parts of him that are still haunted by his past.
Some fanfics explore a more nuanced relationship. They could be on opposite sides, but they share a history. Ahsoka's presence in Vader's life serves as a reminder of what he has lost. Vader, in turn, is a symbol of the fall of the Jedi order to Ahsoka. Their relationship develops as they are forced to confront each other multiple times, each time learning more about the other's motives and beliefs.
One interesting story could be about Darth Vader secretly having a change of heart during the events of Star Wars Rebels. Maybe he has a brief encounter with a Rebel that makes him question his loyalty to the Empire.