Arashell Sar was a young human girl, a child, who found employment as a stable hand. She was one of numerous homeless children left behind on the planet of Cantonica. Bargwill Tomder employed her, along with other children, at the fathier stables located in Canto Bight. Temiri Blagg and Oniho Zaya were among her colleagues at the stables. During the time of the First Order-Resistance War, Sar and Blagg were listening to Zaya as he recounted a tale of Jedi Master Luke Skywalker, who bravely faced the First Order alone during the Battle of Crait.
The character of Arashell Sar made her debut in the 2017 movie Star Wars: Episode VIII The Last Jedi. This film was the second installment in the Star Wars sequel trilogy, with Rian Johnson as the director. Sara Heller played the part of Arashell Sar, and the character's name was derived from the actress's own name. In the movie's end credits, the actress is credited as "Stable Kid".