Dathan had a forbidden relationship with Korenna Mirell, an Enaran female who belonged to a majority of Enarans who opposed the view of the Regressives. Dathan and Korenna would rendezvous late at night when he would climb into her bedroom window. Dathan discreetly attended the presentation ceremony where Korenna received her citizenship award. Like all Regressives, he was to be resettled to Peshar, a faraway province on Enara. At one point, Korenna was assigned to work on a resettlement line, facilitating the transport of Regressives. While she was working there, she discovered, to her shock, that Dathan was to be sent away. The night before he was to be resettled, he told Korenna that her father, Jareth, who was a military official, was exterminating the Regressives. He asked her to run away with him. Due to pressure from her father, she later betrayed him after her father convinced her that Dathan was lying to her and using her because of his position in the government. Dathan was executed as Korenna joined the cheering Enaran mob.
In 2373 his memories were shared by B'Elanna Torres, chief engineer on the starship USS Voyager, as dreams. She found out the truth about the resettlements: they were false; instead the Regressives were murdered because they did not want to live like the rest of the Enarans. These memories were given to her by Jora Mirell who was in fact Korenna Mirell.