Beska was a human female who worked for the Imperial Security Bureau. She was one of Lonni Jung’s agents, who reported to Lagret at the Senate Building. Senator Bail Organa hired her and two other agents, Charval and Selko, to escort Mon Mothma off Coruscant safely. However, Organa and the other agents were unaware of Beska’s true identity. After Charval overheard Beska communicating with Lagret, she pretended she was contacting “work.” Charval became suspicious about Beska and requested her to hand him the communication device. She feigned a handoff, then killed Charval. After Mothma’s speech about the Ghorman Massacre, Beska attempted to arrest her while drawing a blaster. She ordered Andor, Selko, and everyone else to stand down, as she was taking Mothma into custody in her ISB-authorized arrest. However, Cassian Andor killed her with a shot to the head with his blaster after she was distracted by Erskin Semaj calling her a “Rebel Spy.”