Is this supposed to take place after the events of Thomas and the Fall or before?
Before, this part of Sudrian Chronicles takes place in the 1930s. Supernatural Sofie will have its stories take place before and after the events of Thomas and the Fall.
Its Billy! I think?
Yes, it is! Billy is dead within the Sudrian Chronicles canon, having been replaced after a horrific accident by Charlie.
So Billy is coming after Mr. Prescott? And Mr. Prescott was the owner of the line?
Mr. Prescott was the manager of the Wellsworth and Suddery Railway in the Sudrian Chronicles. He believes that it was his fault for the incident involving Billy's death, along with the rest of the passengers, crew, and the guard who were killed in the accident.