Ohta was a Human male who worked as both a mercenary and a bounty hunter throughout the era of the Cold War. He was once a member of the Mandalorians, but they rejected him due to his dishonorable actions. He was eventually captured by the Galactic Republic and incarcerated in Belsavis prison. During the Invasion of Belsavis, approximately around 3641 BBY, he was freed from his confinement along with three additional inmates: Chaney Barrow, Kanjon Slyke, and Paarkos. Their liberator pretended to be a fellow prisoner, but was actually Cipher Nine, an operative from Imperial Intelligence. These prisoners were selected for their particular abilities and tasked with finding a method to infiltrate Megasecurity Ward 23. In order to evade detection by the SCORPIO security system, they devised a strategy to reprogram security droids, instructing them to create chaos and simultaneously trigger numerous alarms in various locations, thereby overwhelming SCORPIO's processing power. The strategy was ultimately successful, although SCORPIO was able to sever her connection to the network and transfer her consciousness back into her droid body.