Vaatrik was married to Vaatrik Pallra. In the 2360s decade, towards the end of the Cardassian Occupation of Bajor, Vaatrik owned a chemist's shop on Terok Nor's Promenade and collaborated with the Cardassians.
In the year 2365, Kira Nerys killed Vaatrik after attempting to locate a list of Bajoran collaborators that Vaatrik had. Gul Skrain Dukat assigned Odo to investigate, although Kira's involvement was not revealed until Vaatrik Pallra attempted to obtain the list of collaborators using Quark in 2370. (DS9 episode: "Necessary Evil", ST - Terok Nor novel: Dawn of the Eagles)