Arashell Sar was a stable hand at the fathier stables in Canto Bight in The Last Jedi. Actress Sara Heller played Sar.
You can also find Sar in The Last Jedi novelization Star Wars: The Last Jedi: Expanded Edition.
Check out the entire list of women in 365 Days of Star Wars Women in the Women in Star Wars Index. It includes highlights from each post plus notes which posts include new 365 interviews with actresses, writers, artists, and more.