Circumstances that will bring the party together

You are a 16-years-old citizen of the Empire, who has requested admittance at the prestigious Thors Military Academy, and has taken the necessary entry exam.
After a long, stressful wait, the official response from the school has arrived, and sure enough, you've been accepted... However, something strange has happened: along with the response, you have received an orbment that doesn't look like the standard one used at the school, as well as a school uniform that, contrary to the school's custom, is bright red...

Now you're aboard the train to Trista, on your way to your first day of school: as you look around the sea of unfamiliar faces in the wagon, all students like you, you notice that some have the same weird, bright red uniform as you...