The Refreshment Lady first appeared in Peter Sam and the Refreshment Lady. She was about to aboard the next train when Peter Sam rushed out so he can get there before Henry leaves Crovan's Gate. She was furious about this when they got there until she explained to Peter Sam that Henry's a guaranteed connection.
In the seventh season, she was trying to find the best location for her tea shop in the Skarloey Railway. Peter Sam took her to all the best places, but she can't make up her mind which place she'll pick. After a storm blew over, Rusty was clearing debris and both he and Peter Sam discovered an old railway coach. Peter Sam decided to turn it into a mobile tea shop. The Refreshment Lady was so delighted about it that Sir Topham Hatt insisted that Peter Sam can take her around all the places she wanted to sell her refreshments.
She was also one of the important visitors Thomas was taking. Like what happened before, she was left behind at Black Loch.