Mos Senay was a 24th century Romulan man, a scientist in the 2370s decade.
Biography
During the Dominion War, Senay was allowed to establish a laboratory on Deep Space 9. Senay returned to DS9 in the year 2376 to stop an entity from the Gamma Quadrant that he had studied and subjected to genetic engineering, the viroid. Senay was killed by the entity. (DS9 - N-Vector comics: "Chapter 1", "Chapter 2", "Chapter 3", "Chapter 4")