Yubicon held the position of chief of staff for Roy Teda on the world of Romin.
General Yubicon was in charge of the defenses against the Citizens' Resistance. This group attacked the corrupt and tyrannical government of "Great Leader" Teda during the Jedi mission to Romin in 24 BBY. Despite the conflict, Yubicon managed to flee with Teda and the insane galactic criminal and scientist Jenna Zan Arbor.
Subsequently, the Jedi's disguise as members of the Slam gang was revealed. Zan Arbor had taken possession of their lightsabers, and they were being taken to a Romin prison. At this point, Siri Tachi knocked Yubicon unconscious when the Jedi fought back to reclaim their lightsabers and escape from the prison they had just arrived at.