You could also explore their relationships in a post - apocalyptic Star Wars setting. Suppose there has been a great war that has changed the galaxy. Luke, Leia, Anakin (if redeemed) and Padme (if alive) have to come together and rebuild their family while also trying to restore order to the galaxy. Their relationships would be tested and strengthened in this new and difficult situation.
In a time - travel scenario, Anakin and Luke's relationship could be transformed. Luke could finally understand his father's struggles more intimately by being present in the past. Padme and Leia might form a stronger bond as well, with Padme being able to mentor Leia in ways she couldn't before. Their relationships would be shaped by the new shared experiences in different time periods and the knowledge they gain from those travels.
Well, at first it might be a bit strained. Anakin has a dark past, and Luke and Leia might be cautious. But as they start to talk and Anakin shows his remorse, they could begin to form a bond. Padme would be the gentle mediator, helping to ease the tension. She could share stories of Anakin before his fall, which would humanize him in the eyes of Luke and Leia.
Their relationship could be explored by having them go on a spiritual journey together. They might meditate in the Force and share their innermost thoughts and feelings, which they've never fully expressed before. This could deepen their bond in a very unique way.
Some fanfics take a different approach to Anakin's fall. Instead of it being a complete turn to the dark side, he may be in a more grey area. And Padme is often written as the one who could have pulled him back completely. Luke and Leia in these stories might be more proactive in trying to understand their father's true nature and not just seeing him as the evil Vader. For instance, there's a fanfic where Luke goes on a journey to find out more about Anakin's past before he became Vader, and Leia joins him later. This gives a whole new dimension to their family dynamic.
Well, in many fanfics, Anakin and Padme's love story is expanded. It could show more of their private moments, their hopes and dreams for the future together. Luke and Leia, as they grow up in fanfic, might find love in different ways. Luke could be seen falling for a new character that was not in the original movies. And Leia, she might have different romantic entanglements that are not just limited to Han Solo. Their relationships are often explored in the context of the greater Star Wars universe in fanfic, with love being a central theme that binds their stories together in new and interesting ways.
I really liked 'The Time - Traveling Skywalkers'. It's a story where all four characters are caught in a time - travel anomaly. They end up in different points in time relative to each other. Padme gets to see a future where her children have grown up strong despite all the hardships. Anakin has to face his past self and tries to guide him away from the dark side. Luke and Leia use their knowledge of the future to try and make the galaxy a better place in the past. It's a really engaging read.
One great storyline could be a 'what if' scenario where Anakin doesn't turn to the Dark Side. In this, he and Padme raise Luke and Leia together. The twins grow up with their father's Jedi training and the family lives in harmony, facing the challenges of the galaxy as a united front.
Their relationship could be explored through shared dreams. Since they are both strong in the Force, they could have dreams of each other even as babies. In the fanfiction, these dreams could be a way for them to communicate on a deeper level, sharing emotions and a sense of comfort, even though they are separated physically.
For Anakin, you need to show his internal struggle. Remember his fall to the dark side was due to his fear of loss. So, in fanfiction, show his conflicted nature. For Padme, write about her strong will and her love for Anakin and the galaxy. Luke should be shown as an idealist, always believing in the good in people. And for Leia, emphasize her leadership skills and her fiery spirit.
The fanfic could be set during the Clone Wars. Anakin's dark side starts to emerge due to the stress and manipulation. Padme notices the changes in him. Meanwhile, Luke and Leia are prophesied to be the ones who can save the galaxy from the dark side that Anakin is falling into. It could show how their fates are intertwined even before they are born, with Padme trying to protect the future of her children and Anakin.