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Sierra is a human character.


Stories From Sodor

The Search for the Controllers

In Sierra's first appearance, she, along with Jacob, Cassie, and Caroline, came to Sodor for the first time to visit Kira and her family[1]. Sometime between the special and Rosie, Jacob, Sierra, and the Troublesome Trucks, Jacob and Sierra decided to stay on Sodor.

Season 1

Later on, Sierra, Jacob, and Rosie were taking a train of stone from Anopha Quarry to Brendam. However, Jacob was very impatient, and did not wait for a brake van before leaving the quarry. Because of this, they had trouble getting up Gordon's Hill until Oliver, Cassie, and Kira came along and helped them up the hill. However, Jacob did not want to stop to uncouple Oliver, and this lead to Rosie and Oliver having an accident in Henry's Forest[2]. Sierra and Jacob later convinced Sir Topham Hatt to restore Glynn[3] and threw surprise birthday parties for Cassie[4] and Caroline[5].

Season 9

Later, Jacob and Sierra were left in charge of the North Western Railway while Richard Hatt's family went on holiday, much to the dismay of Marie and Rose[6].


Sierra is a very loving and caring girl. She is also determined and very persistent. She is very protective of her brother, and is the only person he will listen to about leaving work when he is ill.

In her younger years, before coming to Sodor, Sierra was shown to be very insecure about her outer beauty.


Sierra is of average height and build. She has long red hair that usually tied up in a low ponytail. Her most common attire is a purple turtleneck dress with a dark purple cardigan. She has her ears pierced and usually wears either sun or moon earrings. She also wears a yellow flower in her hair.