Another theme could be a romantic relationship between them. Some fanfictions develop a love story, showing how their different personalities and experiences can create a unique bond. They might start as comrades and gradually develop deeper feelings for each other over time. This can be really interesting as it combines the elements of adventure and romance in the Star Wars universe.
One common theme is their shared journey in the Force. Since they both have a deep connection to the Force, fanfictions often explore how they can learn from each other and grow in their understanding of it. For example, they might have joint Force - related adventures.
One common theme is the passing of Jedi knowledge. Since Ahsoka has more experience and Luke is eager to learn, a lot of fanfictions explore how she imparts her wisdom about the Force, lightsaber combat, etc. to him. Another theme is their combined strength against a common enemy. They are both powerful Jedi, so it makes sense for them to team up against threats in many stories.
One interesting plotline could be their team - up to discover an ancient Jedi secret. This would involve them traveling to different planets, facing various challenges, and using their combined Jedi skills to unlock the mystery. It could be a story about their journey of self - discovery as they learn more about the Jedi past through this adventure.
One popular theme is their training together. Since both are strong in the Force, imagining them sharing knowledge and training techniques is quite appealing. Another theme is them going on adventures. They could team up to face a new threat in the galaxy.
One challenge could be Luke's pre - existing ideas. He has already started his Jedi training with Obi - Wan and Yoda. So, he might be resistant to some of Ahsoka's new teachings. Another challenge could be Ahsoka herself. She has her own emotional baggage from her past, which might interfere with her ability to train Luke effectively.
One idea could be that Ahsoka and Luke team up to face a new Sith threat. They could combine their unique skills and knowledge of the Force. Ahsoka's experience with the Clone Wars and Luke's raw power would make for an exciting duo against the dark side.
One plot point could be a Force - vision they share. In this vision, they see the future of the Jedi Order and their roles in it. This could lead them to make certain decisions to shape that future. Another could be that they encounter a new Sith threat together. Their different experiences with the Sith (Luke with Vader and the Emperor, Ahsoka with Dooku and Maul) would come into play as they strategize to defeat this new enemy.
You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions on various topics, including Luke and Ahsoka. Just use the search function there and you'll likely find many interesting stories.
Many 'ahsoka x reader fanfiction' have the theme of discovery. The reader discovers new aspects of the Star Wars world, new powers, or new secrets along with Ahsoka. There is also the theme of trust. Given the dangerous situations they get into, the reader and Ahsoka have to learn to trust each other completely, and this is often a central part of the story.
Redemption is also a theme. Since Barriss made some controversial choices, some fanfictions might have Ahsoka helping Barriss find her way back, either morally or in terms of her place in the Star Wars universe.
One interesting storyline could be Ahsoka and Anakin going on a mission together that takes them to a mysterious and dangerous planet. They have to rely on each other's skills and the bond they share to survive.