The characters in Spring Awakening aren't "Real People" either! They're CHARACTERS. Barring shows directly telling true stories, no characters are real people. It's all characters, roles, in the drama coming from the creators' minds.
The characters in Starlight Express ARE. NOT. TRAINS. They are characters in a child's dream, in which his/her toys have come to life, and the romance between the characters is the principal motivation for the central character. You really don't know anything about this show, do you?