Another aspect could be that the OC has a strong sense of justice. Rayleigh is associated with the Roger Pirates who had their own sense of adventure and justice. The OC could inherit this value and strive to make the world of the fanfiction a better place, perhaps by fighting against the corrupt elements in the pirate world.
The OC would stand out in terms of physical abilities. With Rayleigh's training, it could have enhanced strength, speed, and endurance. For instance, it could run faster than most characters or lift heavier objects with ease.
Well, in this fanfiction, perhaps the relationship between Luffy and Rayleigh is explored in more depth. We might see Rayleigh sharing his old tales of the Pirate King Gol D. Roger with Luffy. This could inspire Luffy even more in his journey to become the Pirate King. Also, Luffy's character growth in terms of leadership could be a great part. Under Rayleigh's guidance, he might learn how to better lead his crew and make more strategic decisions during battles.
Probably, the main plot is about Luffy's transformation under Rayleigh's training. Rayleigh could be teaching Luffy about the secrets of the Grand Line, the lost history, and advanced combat skills. Luffy then uses what he has learned to face new and more powerful enemies. For instance, he might encounter some strong pirates who are also after the One Piece, and he has to use his newly acquired skills to defeat them and protect his crew. The plot could also involve Luffy's crewmates waiting for him during his training and their own mini - adventures in the meantime.
There's not enough information to know exactly who Rayleigh is. It could be a common name for a person in this context, maybe a local storyteller or someone known within a particular community.
The OC master could be a hermit who has been living in isolation for years, developing a unique understanding of the Force. He or she might have witnessed the downfall of the Jedi Order in the past and wants to prevent Anakin from making the same mistakes.
Power - seeking is a common theme. The oc is often trained by Orochimaru to gain great power. Survival is another one. Given Orochimaru's dangerous and unpredictable nature, the oc has to constantly fight to survive the training. Also, self - discovery. Through the tough training, the oc discovers their own limits and capabilities.
The setting could be a major element. It might be set in a different time or place compared to the original Star Wars universe. Maybe it's during a period of relative peace, and the training is more about self - discovery for Anakin rather than combat - oriented. Also, the powers and abilities that the OC imparts to Anakin can be important. It could be new Force techniques or ways of thinking about the Force that we haven't seen before in the official stories.
One 'oc trained by orochimaru fanfiction' could be 'The Trainee of Orochimaru'. In this kind of fanfiction, the original character (oc) often has to endure Orochimaru's harsh and unorthodox training methods. They might be forced to learn dangerous jutsus or endure physical and mental trials. Another could be 'Orochimaru's New Pupil' where the oc has to adapt to Orochimaru's snake - like ways and his thirst for knowledge and power.
The plot might involve Anakin learning unique combat techniques from the OC (Original Character) master. This could lead to him developing new skills that set him apart in the Star Wars universe, perhaps changing the course of some of the events we know.