BoCo is a diesel-electric tractioned engine who is generally situated on Edward's branch-line. Unlike some other diesel engines, BoCo is kind hearted, and is learning the ways of making Bill and Ben behave from Edward. Donald and Douglas were the last to accept him, but have discovered that he means well and is a gentle giant at heart.
BoCo is a BR Class 28 Co-Bo diesel-electric engine. His name is derived from his Co-Bo wheel arrangement, though reversed as the Reverend W. Awdry thought "BoCo" sounded more affectionate.
- Ilovetrains323 (season one - onwards)