Jeva was born on an Assari colony that was unremarkable except for its element zero deposit. Her family came to work on harvesting the element, and so Jeva turned out to be a biotic. Her home was attacked on occasion by mercs of the Blood Pack, and she carries a hatred to this day or the Vorcha that killed her siblings.
Upon reaching Maiden status, Jeva joined the military. It was discovered that her mother had lied to her about her genefather being a krogan, and this tore Jeva heart apart. She excelled in the fields of longarms and piloting, and was soon piloting a commando team around. Although Jeva was noted for being strict, she was eventually transferred to the 7th fleet. On her 2nd mission, her shuttle was shot down by geth tower, and only Jeva came back alive. During her physical therapy to recover from the injuries sustained, she became addicted first to pain killers, and later to harder drugs. This impacted her ability to perform her duties, and she was discharged from the army.
Jeva's story woud have ended on Omega, had she not been discovered by another Assari when she was alone with her pistol. This Assari was searching for Jeva's sister, and saw in Jeva a kindred spirit. She took Jeva to a monastery for training, and Jeva worked hard at becoming clean and moving on with life. She soon took the oaths of the Justicars, and a new name along with her new life. She is hunting people she believes are involved in illegal smuggling with Batarians, and is using her old life as Jena as a cover for her activities.