トップハム・ハット卿
The following day, Thomas tells Percy about Hiro, and asks him to do his own job while he helps Hiro. Percy misplaces his own mail trucks and breaks down while doing Thomas's job, so Thomas brings him to the Steamworks. The Fat Controller finds out about this and scolds Thomas by forcing him to do Percy's work. With nobody else to ask for help, Thomas and Percy tell the rest of their friends (Gordon, James, Edward, Henry, Toby, and Emily) about Hiro. They all work together in bringing Hiro new parts, distracting Spencer, and keeping the operation a secret from the Fat Controller while Thomas and Percy try to find the missing mail trucks. Hiro makes friends with all of the engines, but gradually grows homesick. On the day that the last necessary part for Hiro is to be delivered, Spencer discovers Percy's mail trucks, only to be cornered by Thomas, James and Toby. The Fat Controller accuses Spencer of stealing the trucks and demands he return them to Percy.