Ziss't was a male Trandoshan who worked as a laborer and lived in the Gnawer's Roost district of Coruscant. He was visiting the Invisible Hand cantina along with his friend, Q'elliss, when it became the site of a firefight between the ISB agent Tavik Moern and some Quarrens against the Alderaanian Resistance. He and his friend ducked and attempted to flee the cantina at the first opportunity available.