Beti refers to a doll that belonged to the human Sylvestri Yarrow when she was a child. As a humorous gesture, Sylvestri later named her blaster rifle "Beti" after the doll when her mother, Chancey, presented it to her. During 231 BBY, Sylvestri remembered the reason behind naming the blaster after the doll. This recollection occurred when she, along with her co-pilot Neeto Janajana and the security droid M-227, were contemplating their next move as the Nihil pirates expressed their desire to scan their ship within the Berenge sector, and she drew the weapon from its holster.
Justina Ireland mentioned Beti in her young-adult novel, Out of the Shadows. This novel was part of the Star Wars: The High Republic multimedia project and became available on July 27, 2021, as a contribution to Phase I of the project. Notably, in a preview chapter featured in The High Republic: Into the Dark, a novel by Claudia Gray that was published on February 2 of the same year, the doll's name was written as "Betty."