One possibility in fanfiction could be that Ahsoka is tricked into the Dark Side. Maybe an old enemy manipulates events to make her feel betrayed by the Jedi Order. This could lead her to explore the power of the Dark Side, believing it to be a way to seek justice on her own terms.
She might be tempted by the Dark Side if she discovers a hidden truth about the Jedi Order that she can't accept. So she turns to the Dark Side thinking it's a better alternative. For instance, if she finds out that the Jedi have been hiding some dark secrets about the Force, it could push her over the edge.
One possible story could be that Ahsoka, after facing a series of great losses and betrayals, starts to be tempted by the Dark Side. Maybe she discovers some ancient Sith knowledge that makes her question her Jedi teachings. She could struggle with the newfound power it offers and the darker emotions it stirs within her, like anger and vengeance.
One great Ahsoka Tano fanfiction could be about her secret missions during the Star Wars Rebels era. Maybe she's uncovering a hidden Sith plot that could endanger the entire Rebellion. It would be filled with her amazing lightsaber skills and her strategic mind at work.
There might be a fanfiction where Ahsoka tries to redeem Maul. Given her Jedi - like nature, she could see the good in him that was once there before he fully turned to the dark side. This would involve a lot of emotional exchanges and battles within Maul's mind as he struggles with his past and the possibility of redemption.
A great plot could be Ahsoka having to face a Sith Lord who has a personal vendetta against her. This Sith Lord could be an old enemy she thought was dead. Or perhaps a plot where she is training a new group of Force - sensitive individuals in a post - Empire galaxy, and they face threats from remnants of the Imperial forces. Also, a story where she goes on a quest to find an ancient Jedi artifact that has been lost for centuries.
Ahsoka might be exiled from the Jedi Order for reasons she doesn't fully understand. In her solitude, she meets a mysterious figure who has ties to the Dark Side. This figure begins to teach her alternative ways of using the Force that are more in line with the Dark Side. Ahsoka, feeling betrayed by the Jedi, starts to consider these new teachings.
One great Ahsoka Tano fanfiction is 'Ahsoka's New Journey'. It explores her adventures after leaving the Jedi Order in a really engaging way. The author does a wonderful job of staying true to her character.
Friendship and loyalty are big themes too. Ahsoka has made many friends and allies throughout her adventures. Fanfictions often focus on how she maintains those relationships, like her loyalty to Anakin Skywalker even after leaving the Jedi Order, or how she forms new bonds with characters she meets during her travels.
Sure. There are fanfictions that revolve around Ahsoka's journey across the galaxy, her encounters with strange new species, and her contributions to the greater good. These stories are more in line with the spirit of the Star Wars franchise and are suitable for a wide range of readers.