She grew up with as orphans on Nar Shaddaa before the latter was killed by Imperial forces. Lelsk worked as a Bothan Spynet operative with the codename Go Silent before subsequently joining the Alliance as an Infiltrator, and was dedicated to finding data about the Empire.
She was assigned to Trivar II with Jaxon Brand to recruit and spy. When Rebel pilots were shot down, she joined the rescue operation.
Lelsk is one of the pre-generated characters from the Star Wars: Age of Rebellion Beta. She was then used as one of the pre-generated characters in Fantasy Flight Games special promotion, Rescue at Glare Peak.