Yalla, a Mirialan female, shared a cell with Jyn Erso at the Imperial Detention Center & Labor Camp LEG-817 located on Wobani. Known for her rebellious spirit and aggressive nature, Yalla had fellow rebel comrades within the prison. These rebels instigated a riot, but stormtroopers quelled the uprising. Ultimately, Yalla met her death at the hands of a stormtrooper.