Yassim was a Bajoran Vedek in the 2370s. In 2374, while the Dominion was occupying Deep Space 9, Vedek Yassim organized a demonstration on the Promenade in opposition to the Dominion, claiming that they were evil, and Bajor should not ally with them. Major Kira Nerys decided she would talk with Yassim, hoping to stop the demonstration as that would be all Gul Dukat needed to increase security on the station and suppress the Bajorans further.