One main factor could be the influence of a powerful dark side figure. Such a figure might manipulate Luke's emotions, like his fear or anger. Maybe they prey on his insecurities about his abilities or his place in the galaxy.
Well, obviously Luke himself is a key character. He is the one who is falling to the dark side, so his actions, thoughts, and decisions are central to the story.
There are likely some out there. You could try searching on fanfic platforms like Archive of Our Own. They have a large collection of fanfictions and you might be able to find one with this particular pairing.
One possible plot could be that Luke initially starts out as a rival to Percy but as they interact more, he begins to see Percy's true self and falls for him. Maybe they are forced to work together on a dangerous quest and during that time, Luke's feelings develop.
The Emperor or some other powerful Sith lords would likely be involved. They would see Luke as a great prize to turn to the dark side and would use all their cunning and power to manipulate him. Yoda's spirit could also be present, trying to guide Luke from beyond the grave but perhaps being unable to prevent his fall. Han Solo might also play a role, either trying to rescue Luke or being a victim of Luke's new dark side - influenced actions.
In some fanfictions, Luke might fall to the dark side after being betrayed by his closest friends. For example, if he discovers that they have been hiding important information from him that he thinks could have saved lives. This sense of betrayal could push him towards the dark side as he feels abandoned by the light. Also, a powerful dark side user could use mind control techniques on Luke, slowly turning him over time.
Luke could also be a book collector or a bibliophile who likes to customize the books he owns. In this case, he has 'cut' a romance novel, perhaps by removing pages he didn't like or by creating a unique binding for it. However, this is a less common interpretation compared to the first two.
Luke and Solo were the two main characters in the Star Wars series. They were all heroes of their youth who had experienced many setbacks and growth. Luke longed to fly and escape from the planet that bound him. He planned to join the Imperial Military Academy. Han Solo also yearned for the life of a pilot, and his path also pointed to the Empire. They all wanted to become pilots and draw their own destiny in the starry sky. Luke's performance was relatively gentle, while Han Solo was a hooligan who was the most important to his survival. They had a complicated relationship in the series, sometimes friends, sometimes enemies. The story of Luke and Solo played an important role in the Star Wars series.
I'm not sure specifically who 'Luke Guldan' is in the 'Tell Me a Story' context without more information. It could be a character, an actor, or someone related to the production in a unique way.
Luke's ticket could be exchanged at the NPC, Erika. Players need to prepare 10 data chips and 5 refined spacetime stones as exchange materials. Each player can use their account to buy 10 tickets per day. The Luke ticket was used to enter the Luke Instance Dungeon. Players could team up with their friends to challenge it and have a chance to obtain high-rare and powerful equipment. The Luke Instance Dungeon could only be played once a day and twice a week. The number of times would reset every Sunday.