One idea could be that Ahsoka tells them stories about their father, Anakin Skywalker. She could share the good times she had with him, like their adventures together. This would give Luke and Leia a more personal connection to their father before they fully understand their heritage.
Ahsoka could also protect Luke and Leia from potential threats. In the fanfic, there could be bounty hunters or other villains after them. Ahsoka, with her combat skills and experience, would be able to fend off these attackers. She might even use some of her unique fighting styles that she learned from different masters to keep the kids safe.
Perhaps Ahsoka could teach Luke and Leia some basic Jedi skills. For example, she could show them how to sense the Force around them. She might take them to a quiet place and have them close their eyes and feel the energy of the living things around them. This would be an important step in their Jedi training, even at a young age.
Ahsoka could introduce Luke and Leia to some of her friends or allies. These new characters could be from different species or backgrounds. This would expand Luke and Leia's view of the galaxy and the different kinds of beings that inhabit it. It could also lead to new storylines and adventures as they interact with these new friends.
Luke would probably be excited. He's always eager to learn more about the Jedi. Leia might be a bit skeptical at first. Ahsoka would likely be analytical.
One idea could be a story that focuses on Anakin's internal struggle between his love for Padme and his fall to the dark side as Darth Vader, while Luke and Leia unknowingly grow up in the shadow of their father's actions. It could explore how their lives might have been different if Anakin had not turned, and how they eventually come to terms with his true identity.
In a time travel fanfic, Anakin and Padame could be sent forward in time to meet Luke and Leia. At first, they are shocked by the state of the galaxy. But then, they decide to use their knowledge of the past to help Luke and Leia in their fight against the remnants of the Empire. Anakin, having redeemed himself in this new future, could train Luke further, and Padame could offer diplomatic and strategic advice to Leia.
Perhaps a fan fiction where Luke and Leia travel back in time to the days before the Clone Wars. They could use their knowledge of the future to try and prevent the events that led to the rise of the Empire, all while trying to keep their identities a secret.
They might be quite intrigued. Luke could be interested in seeing different takes on the events before his time. Leia might be looking for connections to her own backstory. And Ahsoka, having lived through some of those times, would probably be critical of any inaccuracies.
One idea could be that Luke and Leia time travel back to the time before their parents' relationship soured. They could try to prevent Anakin's fall to the dark side, which would in turn change the fate of their family. Their presence might also have unforeseen consequences, like disrupting the natural flow of the Force. Maybe they meet their younger selves as children, which would create some really interesting and complex scenarios.
One idea could be a time - travel plot where Luke and Leia are sent back in time and meet their parents, Anakin and Padme, before Anakin's fall to the dark side. They try to prevent the events that led to the rise of the Empire.
Perhaps a fanfic that delves into the time when Anakin was on the cusp of turning to the dark side. Padme could sense the change in him and tries to prevent it with the help of Luke and Leia from the future who somehow travel back in time. This would create a complex web of relationships and a race against time to save Anakin from the dark side.
Maybe in the fanfic, Padme discovers a time - travel device and decides to use it to go back in time to when Anakin was still a young Jedi. She hopes to change the course of his life and prevent his turn to the dark side. Luke and Leia, sensing something is wrong with the timeline, follow her. Once there, they have to navigate the complex politics and relationships of that era while also trying to keep their true identities a secret. This could lead to all sorts of interesting interactions and plot twists.