Eritha was a human female, the offspring of Ewane and the twin sister of Alani.
She came into the world in 57 BBY on the planet New Apsolon. The planet was governed by a totalitarian regime during this period. The Civilized class enjoyed all privileges, while the Workers class was mired in poverty. Ewane, Alani's father, spearheaded the resistance movement against this societal structure. This involvement led to multiple incarcerations, limiting his interaction with his daughters. Alani and Eritha were primarily nurtured by their father's acquaintances, as their mother passed away around the time of their birth. Lenz was one of these friends.
In 47 BBY, following the regime's collapse, Ewane was elected as the Supreme Governor of New Apsolon during the inaugural elections. Jedi Knights were dispatched to oversee the election process, with Qui-Gon Jinn and Tahl representing them. Tahl formed a connection with Eritha and her sister, Alani.
Ewane served as governor for a five-year term, but he was assassinated early into his second term. Roan, a close confidant of their father and his successor, took them in as his own. Subsequently, Alani and Eritha devised a strategy to seize control of New Apsolon. This strategy involved assassinating Roan and abducting Tahl, who ultimately died from her injuries. However, the scheme was thwarted, largely due to the intervention of Qui-Gon Jinn and Obi-Wan Kenobi, who journeyed to New Apsolon in search of the missing Tahl. As a result of the failed plan, Alani and Eritha, along with their accomplice Balog, were taken into custody.