Olivia is a miniature tank engine who was brought to the Arlesdale Railway. Olivia is a hard worker, and as taught by Sir Walter, never gives less than her very best. Initially, she was unfamiliar with timetable running and signals, as these weren't used on the estate railway. She and the railways' other engine were run on an 'as needed' basis, and movements were coordinated by radio. However, she quickly learned how to read signals and work to a timetable.
Olivia is based on Lydia of the Perrygrove Railway.
- Olivia will appear in the series soon.