Mrs. T. Mark is the manager of McCrakenton Freight Depot.
Mrs. T. Mark heads up the McCrakenton Freight Depot, where Livi works at. Mrs. T. Mark is very patient with her fussy and bossy engine, but will always be stern whenever Livi boils up trouble around the railway, and isn't afraid to punish her whenever she's done things she shouldn't be. Mrs. T. Mark is very friendly, but very fair.
- According to Milan, Mrs. T. Mark was originally going to be a 2D Character