トップハム・ハット卿
"Sir Topham Hatt" (better known as "The Fat Controller" or "The Fat Director"), is the head of the main rail company on Sodor. He is a firm but fair leader for whom the engines have the greatest respect. It is revealed in that over the course of the series, Sir Topham Hatt's son Charles Topham Hatt II had succeeded him in 1954, and his grandson Stephen Topham Hatt III became the Fat Controller in 1984. In , it is stated Sir Topham Hatt I's great-grandson Richard Topham Hatt IV will become acting controller upon Stephen Topham Hatt III's retirement, but it is unknown when this occurred.