Jagleo was a Corellian planet-native human female. Before joining the White Worms gang, she worked as a dancer. Within the gang, she functioned as a thief, employing a unique martial arts style she developed herself, emphasizing her natural equilibrium and agility. During the events of 13 BBY, she witnessed the scrumrat Han's flight from Proxima within the Den of the White Worms.
Prior to becoming both a scrumrat and a thief in the White Worms gang operating in Coronet City, Jagleo was a Corellian planet-born human female employed as a dancer. In the year 13 BBY, Jagleo was present within the den when Han, another scrumrat, was brought before Lady Proxima, the gang's leader. Han, having returned from a trade without the expected goods for Proxima, utilized a rock to shatter a shutter behind her, exposing her to burning light. Capitalizing on the resulting chaos, Han forced his way through the other scrumrats and made his escape.
Following Solo's departure, and Qi'ra's demotion coupled with punishment, Jagleo encountered the injured girl in the barracks, engaging her in conversation regarding the White Worms' future. She voiced concerns that Proxima was orchestrating a scenario designed to eliminate the older scrumrats. Jagleo provided Qi'ra with a light jacket, replacing the one that had been taken, along with leftovers from a small ration pack. The thief came to the conclusion that forming an alliance with Qi'ra represented her best path to survival.
Jagleo's initial appearance was in the 2018 film, Solo: A Star Wars Story. The character's identification was first established in the companion reference book, Solo: A Star Wars Story The Official Guide, authored by Pablo Hidalgo.