In certain fanfiction, Luke's actions might be misinterpreted, leading to the idea of him being a traitor. For example, if he discovers a long - hidden truth about the Jedi and the Sith that challenges the established order. His attempts to expose this truth could be seen as traitorous by those who want to maintain the status quo. He might also be forced into situations where he has to work with the 'enemy' to save his friends or the galaxy, and this cooperation is wrongly construed as betrayal.
One possible reason could be a misinterpretation of his actions. Maybe he made a decision that others in the fanfiction misconstrued as betrayal, like his attempts to reach out to the enemy in an effort to bring peace but it was seen as siding with them.
One common plotline could be that Luke is lured to the dark side by promises of power. The dark side characters might convince him that he can better protect the galaxy with their power. Another plotline is that he is wrongly accused of a crime against the Jedi Order or the Republic, which makes everyone think he's a traitor.
There could be several reasons. Maybe he felt fanfiction misrepresented his character or the Jedi ideals he held dear. Fanfiction often takes creative liberties that might not align with how he envisioned the Star Wars universe.
It can create a lot of conflict. For example, it can split the loyalties of other characters. Some might still believe in Luke and try to prove his innocence, while others might turn against him, leading to internal battles within the group.
One possible reason could be that he's afraid of the power he discovers within himself. He might run away to avoid being corrupted by the dark side of the Force that he senses growing in him. It's a common theme in 'Star Wars' where characters struggle with the duality of the Force.
One reason could be that Vader represents the dark side which has brought so much destruction in the galaxy. Luke, being on the side of the Jedi and good, would naturally despise the evil deeds associated with Vader.
Star Wars is fiction because it's a created universe with made-up characters, planets, and storylines that don't exist in the real world.
There could be such a fanfiction. Fanfic writers like to explore different facets of their favorite characters. In the case of Luke from Star Wars, his not eating could be a plot device. Maybe he's on a dangerous mission and has no time to eat, or he's in a state of distress and has lost his appetite. This could lead to an exploration of his character, his relationships with other characters who might be concerned about his lack of eating, and how he overcomes whatever is causing him not to eat.
One possibility is that the Sith or some dark side cult would kidnap Luke. They'd want to either corrupt him or stop him from being a threat to their plans. Luke is a powerful Jedi, and getting him out of the picture would be a major advantage for the dark side.
I think the story where Luke goes on a journey to discover more about the origins of the Jedi is really good. It gives a deeper understanding of the Jedi lore and Luke's place in it. He meets different characters along the way who help shape his view of the Jedi Order.