Bert

Bert is a blue miniature gauge engine who runs the Arlesdale Railway. He is the oldest of the original three.

Bio
Bert was built 1894. He ran a line in England until 2002, when he came to Sodor to run the Arlesdale Railway. He and the other three engines were put into a shed until the Arlesdale Railway opened the following year.

Persona
Bert takes advantage of his strength, as Mike says. However, Bert is very strong, when he isn't having boiler problems. He is good friends with all engines on the Arlesdale railway, especially Mike and Rex. He is willing to pull long trains, but it irks him when he gets attention for being stronger and not for being friendly. However, Bert being the oldest of the engines, he understands almost completely.

Appearances
Season 2: Perspectives and Sizes, Expect the Unexpected

Season 3: The Really New Engine (Mentioned; Subject to Change)

Specials: Protecting Donald