Rurigan, a Yaderan
The Yaderans were a humanoid species from the Gamma Quadrant. They were experts in Omicron radiation-emitting holotechnology.
In 2340 their homeworld, Yadera Prime, was annexed by the Dominion. According to Rurigan, life on his homeworld changed so dramatically afterwards, that he did not feel to belong there anymore.(DS9: "Shadowplay")