In a fanfiction, Ezra could be exposed to a dark side cult. They convince him that the Dark Side offers a more efficient way to bring order to the galaxy. He then starts to use dark side techniques in his fighting and decision - making. His fall to the Dark Side could be a long and tragic process, with him losing his moral compass along the way.
In one idea for a fanfiction, the Empire creates a false prophecy that convinces Ezra that he is meant to rule the galaxy as a Dark Lord. They manipulate events and his emotions to make him believe that the Dark Side is his true path. He then starts to build his own army of Dark Side followers. But as he rises in power, he realizes that he has been deceived, yet by then it may be too late to easily return to the Light Side.
Ezra could be lured by a Sith artifact. It emits a strong dark side energy that begins to influence his thoughts. He starts to question the Jedi ways he has been learning, thinking that the quick power of the dark side might be better. But his loyalty to his friends in the Rebellion holds him back from fully embracing it at first.
One possible fanfiction could be about Ezra Bridger's struggle against the allure of the dark side. Maybe he has a vision of great power that could be his if he turns, but he remembers his friends and the teachings of the Jedi. He battles internally, with the dark side whispering temptations in his ear.
In a fanfiction, Ezra might be tricked into joining the dark side by a disguised dark side user. This person could pose as a friend in need, only to lead Ezra down a dark path. They could manipulate his insecurities and his desire to be a stronger Jedi.
A fanfiction idea could be that Ezra, in his search for a way to defeat a great enemy, stumbles upon an ancient dark side temple. Inside, he is influenced by the dark side presence. His connection to the light side starts to fade. He becomes more aggressive and less empathetic, using his powers for his own gain rather than the greater good, and his relationships with his former allies become strained as a result.
One possible scenario in a fanfiction could be that Ezra is lured to the Dark Side by the power it seems to offer. Maybe he gets frustrated with the slow progress of the Rebellion and the constant threat from the Empire. He might be tempted by a powerful Sith Lord who shows him visions of a galaxy where he has the strength to end all the chaos, but at a great moral cost.
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.
Ezra could start to show signs of being drawn to the dark side through his growing anger. For example, if something bad happened to his friends and he couldn't save them, his anger could make him more susceptible to the dark side's influence.
Ezra could resist the dark side by relying on his strong bonds with his friends. Their loyalty and friendship act as a shield against the temptations. For instance, when he has moments of weakness and hears the dark side's whispers, he thinks about how his friends would be disappointed, and that gives him the strength to fight it.
In this fanfiction, it could be that Ezra is deceived by a powerful dark side figure. He might start to believe that the Jedi way has failed him and that the dark side can provide a more effective means to achieve his goals. This could lead him to make choices that gradually draw him deeper into the dark side, like using dark side powers and distancing himself from his former Jedi allies.