Since the title mentions the stars, there could be a character who is an astronomer or someone with a deep fascination for the cosmos. This character might be on a quest related to the stars, using the night train as a means to reach their destination or fulfill their dreams.
The themes might include adventure. Given the idea of a train journey to the stars, it implies a sense of adventure, leaving the familiar world behind and embarking on an extraordinary journey. Also, there could be a theme of self - discovery. As the characters travel through these strange settings, they may learn more about themselves, their desires, and their fears.
It could be the train conductor who might be a central figure in some stories, as they are in charge and interact with all the passengers.
The main characters in 'flight to the stars and other stories' could be a diverse group. It might include a young prodigy who has a unique understanding of space - time physics and is crucial in making the star flight possible. There could also be a grizzled veteran of space missions who provides guidance and wisdom to the younger crew members. And, of course, there may be alien characters that the human characters interact with, which could lead to all sorts of interesting plot developments.
The main character is Raimund Gregorius, a Swiss teacher. He is a rather introverted and routine - bound person at the start. His journey on the night train to Lisbon is a turning point in his life.
Since I haven't read the book, it's difficult to say for sure. However, based on the title, it might be characters who are somehow connected to the stars. Maybe there are astronomers or stargazers as main characters. Or perhaps there are magical creatures that are associated with the stars in some way.
The main characters will be Peppa Pig, her family members like Mummy Pig and Daddy Pig, and of course her little brother George. Her friends might also make appearances in the 'Stars and Other Stories'. They all contribute to the fun and educational stories in the Peppa Pig universe.
Thomas is surely one of the main characters. His friends like Percy, James etc. are also likely to be main characters in these stories.
Based on just the title, Mr Harris is clearly a main character. There may be other characters like fellow passengers. Maybe there's an old lady who shares her life stories with Mr Harris during the night train journey. Or there could be a young adventurer who is also on the train and they both get into some sort of adventure together. It's also possible that the train driver has some part to play in the story, even if it's just in the background creating the atmosphere of the moving train.
There could be a brave young girl who ventures into the unknown to solve the mystery of the spooky happenings.
There could be dreamers. Since the title has such a fantastical element like the kite of stars, it's likely that the characters are those who have big dreams and are not afraid to think outside the box.