Agnes, Ruth, Lucy and Jemima are the oldest coaches from the Skarloey Railway on Sodor, whilst Beatrice is their guard's van.

The coaches like all the engines, Sir Handel least of all for referring to them as "cattle cars". They were also mistrustful of Skarloey at first for being bouncy. On the contrary, they took to Peter Sam right away, and he even called them his 'dears' whenever he took them out.

Agnes is a deep-voiced and proud first-class carriage who looks down on the others, who are third-class. Agnes appears to be the leader of the five. All four coaches look down on Beatrice and claim that she "smells of fish and cheese". Beatrice is, however, very useful. She has a ticket booth and an emergency buzzer and sometimes even carries passengers when the coaches are full. Jemima is somewhat deaf.

The coaches are genuinely nice and quiet like many other coaches but can be hot-tempered and sinister if an engine does not treat them properly. They can occasionally be silly and awkward and play tricks on the engines by pushing them down a hill without thinking about what they are doing, something that Sir Handel and Duncan struggle with. However, Skarloey and Rheneas, given their many years of experience, always know when to be stern with them when they misbehave and put them in their place.

Her voice source is freelanced, meaning so long as it’s within the age range, anything goes.