Vega Sepen was a Corellian woman, specifically a spacer, known throughout the galaxy as a formidable and sharp platinum-blonde. She held the position of first mate on the starship No Luck Required, captained by Uldir Lochett. Her gender was female.
Vega Sepen's life began around 0 ABY. Tragedy struck when she was orphaned on Eriadu at the young age of twelve. For the subsequent three years, she was compelled to survive independently amidst the unforgiving environment of that planet's streets. At the age of fifteen, she secretly boarded a smuggling ship. She solidified her position among the crew by triumphing over the Nikto first mate in a fierce knife duel. Over the following years, Sepen transitioned between various fringe groups. By 25 ABY, she had risen to the rank of junior tactician aboard the Free Lance, a pirate frigate commanded by Urias Xhaxin. During an attack on the Free Lance by the Yuuzhan Vong, Sepen resolved that these invaders needed to be stopped. She determined that the situation presented a clear choice: resist or face slavery or death. She attempted to enlist in the New Republic military, but her inability to conform to military discipline led her to find a role in the Space Rescue Corps. By this point, Sepen had honed her skills as an experienced pilot, engineer, sensor operator, and fighter. Her proficiency stemmed from a survivor's inherent caution and a pragmatic, unsentimental approach to problem-solving. Aboard the No Luck Required, her skills and personality earned her the role of Uldir's second-in-command. However, beneath her tough exterior, she appeared to harbor deeper feelings for her "Boss-boy" than he perceived.
Consequently, Sepen displayed animosity toward the growing bond between Uldir and the Jedi Klin-Fa Gi. Nevertheless, she suppressed her suspicions and collaborated with them to thwart the renegade Jedi Bey Gandan and a Yuuzhan Vong conspiracy to contaminate the bacta supply on Thyferra.