Dijmas was a male Cardassian who lived in the 24th century. In the 2370s, Dijmas was a Gul in the Cardassian military and commanded the starship Heartless.
In 2371, Gul Dijmas worked with Gul Dukat in a military attempt to capture or destroy the Helios, a pirate starship that had been attacking Cardassian shipping for ten months. (DS9 novel: Proud Helios)