Ymmoss, a Gigoran female also referred to as Snowball, resided within the galaxy. In the year 34 ABY, Ymmoss, together with Cost Niktur, were taken prisoner by the First Order and Harra. These captors then dispatched them to a stronghold situated on Vodran. Upon the capture of J-Squadron on Vodran, Ymmoss and Niktur aided J-Squadron in their breakout from the stronghold.