Since I haven't read 'Percy's Ghostly Trick and Other Stories', I can only speculate. Percy is probably the protagonist. Given the 'ghostly trick' part of the title, he might be a character who has a unique power or skill related to ghosts. Maybe he's a character who has to learn to control this power, and the stories could be about his journey in doing so. There could be different relationships in the book, like with his friends or family, who might be affected by his ghostly trick in some way.
Well, without having read the book, we can only guess. Maybe there are stories about how Percy uses his ghostly trick to solve mysteries. There could also be other stories that are set in a spooky or mysterious environment, like an old haunted house or a dark forest, and they all tie in with the overall theme of the book.
Percy is surely one of the main characters since the book has 'Percy's Ghostly Trick' in its title. He is likely to be central to at least one of the stories.
Well, one interesting story could be about Percy's ghostly trick itself. Maybe Percy plays a spooky prank on the other engines, which makes for a fun and exciting tale.
I'm not sure who Percy is exactly as I haven't read the book. But based on the title, Percy is probably the protagonist. He's the one who has the important role of saving the day in the stories.
There could be other non - human characters like a wise old wizard who knows about Percy's true nature and tries to guide him. Maybe a shape - shifter who at first seems like an enemy but later becomes an ally.
I'm not sure who the author of this work is. There are many books with similar titles, so it's difficult to determine without more information.
There could be a wise old monster who acts as Percy's mentor. Maybe a female monster who becomes Percy's love interest. And of course, there would likely be some villainous monsters who oppose Percy's new existence and try to harm him.
Jason is likely to be another main character. Since he has his own set of skills and knowledge, he might have an interesting relationship with Percy in this story. Maybe he's a bit jealous at first of Percy's control over the ship, but then they end up working together really well. And of course, Piper could be there too. She might use her charm - speak abilities to help the crew communicate with any strange creatures they encounter during Percy's time controlling the Argo 2.
Grover can also be quite prominent. His loyalty to Percy remains a key factor. In some fanfictions, his connection to nature might be enhanced to better support Percy in his overpowered adventures. For example, he could be able to communicate with more powerful nature spirits to assist Percy in battles or quests.
Perhaps he has a childhood friend, Tom, who also joined the army. Tom is more of a follower type, always looking up to Percy for guidance. And then there's a foreign - born soldier, Ahmed, who brings a different perspective and set of skills to the group. Ahmed might be really good at stealth operations and teaches Percy some new techniques.