Yoda could also be an important character if the time travel somehow involves the time when he was still alive. He could offer his wisdom to Luke and perhaps even try to reach out to Vader's remaining light side, given his powerful connection to the Force.
Well, obviously Luke and Mara are the main characters. Luke Skywalker, a powerful Jedi, brings his skills and knowledge of the Force. Mara Jade, with her own unique connection to the Force and her combat abilities, is also crucial. Their relationship, which might be romantic or just a strong friendship, is often at the center of the story as they rely on each other during their time - traveling adventures.
Obviously, Luke Skywalker and Darth Vader are the main characters. Luke, the heroic Jedi, and Vader, the complex Sith Lord. In this fanfiction concept, their relationship is likely to be re - imagined in a very different way compared to the original Star Wars story.
Another plotline could involve them traveling to the future. Maybe they see a world where the Jedi have been fully restored and are working in harmony with the galaxy. This could make Vader question his past actions even more, and Luke could gain new insights into the future of the Jedi Order.
Obviously, Darth Vader and Luke Skywalker are the main characters. Vader is the one on the hunt, and Luke is the target of his search.
Sometimes, new characters are introduced in these fanfictions that can be really well - written. They could be characters who act as mediators between Luke and Vader, or they could be side characters who are affected by Luke and Vader's interactions. For instance, a young Jedi apprentice who looks up to Luke and is terrified of Vader, but through the story, comes to see Vader in a different light.
Their relationship could become more understanding. As they travel through time and see different events together, Luke would gain a deeper understanding of what led his father to become Darth Vader. Vader, in turn, might see Luke's unwavering hope and goodness more clearly, which could soften his stance.
Perhaps they time travel to a parallel universe. In this universe, Darth Vader never turned to the dark side and Anakin Skywalker remained a Jedi. Luke would be able to see how different things could have been. This experience might inspire Vader in their own universe to try and find a way back to the light side, and they could then work together to bring positive change to their own timeline.
Often, Palpatine can still be a main antagonist even in time travel fanfiction. If Luke and Leia travel back in time, he might sense their presence and try to stop them from changing things that would undermine his power. Another could be Darth Vader if they travel to a time when he was still firmly on the dark side. He would be a powerful foe for them to face.
One common theme is redemption. Vader's journey towards redemption through his connection with Luke is often explored. It shows how love for his son can make him turn away from the dark side.
Vader might initially be shocked. His son reaching out to him is unexpected. He could respond with a moment of silence, trying to process what is happening.