Bear

Bear (Diesel 7101) is a mixed traffic diesel engine who works on the Main Line. His name comes from the growling noises his engine makes, which make him sound like a bear.

Bear was originally known as D7101, and came to Sodor on loan with another diesel named D199. D199 was blatantly arrogant was mean to the steam engines.

The next day, 7101's injector failed while pulling a train called the Limited. Henry, who was already towing 199 and his train of oil tankers, came to help. 7101 was still able to move by himself with some help from Henry, whose regulator had failed. When they got to the next station, Flying Scotsman took their train, while Henry helped 7101 home. Along the way, Henry told the diesel about his failed regulator. 7101's had a long think about this.

The engines persuaded Sir Topham Hatt to let 7101 stay on the North Western Railway, and renamed him Bear, because his engine growled like a bear. Bear liked this name, because on the mainland he only had a number. He felt like he really belonged. He was given a new green livery and the number "D3."