Darrah Mace was a Bajoran man of the Ke'lora caste who was married to Darrah Karys and had two children, Darrah Bajin and Darrah Nell.
In 2318, he was serving as a constable in the Korto City Watch when he had to break up a fight between Syjin and another man. Later that year he would coordinate the security at the Naghai Keep when the Cardassians arrived. While providing security, Darrah met Skrain Dukat and received a positive impression of him.
By 2323, Darrah had risen to the rank of inspector within the Watch because of his work at the Oralian compound outside of Korto. At this time he was sometimes responsible for escorting Minister Jas Holza. He was also responsible for helping to save multiple people when there was an explosion aboard Cemba Station and was hailed as a hero for his actions. Also in 2323, Darrah's wife left him after years of fighting because she didn't feel safe on Bajor anymore, due to its bombardment by a Tzenkethi marauder.
In 2328, Darrah was serving as a chief inspector in Korto when it descended into anarchy because of the machinations of the Obsidian Order. At the same time, Syjin discovered the log recorder of the Clarion, which revealed that the Cardassians were behind the Tzenkethi marauder's attack. The two men attempted to take the recorder to Ashalla, but they were stopped by Cardassian fighters, so they instead chose to leave the system and meet up with the USS Gettysburg. On their way to the meeting, Dukat gave chase aboard the Vandir and a battle ensued in which Syjin was killed and Darrah barely escaped. Afterward, the Gettysburg dropped him off on Valo II where his family was. (ST - Terok Nor novel: Day of the Vipers)
Darrah returned to Bajor with his family in 2369 when the Occupation of Bajor ended. (ST - Terok Nor novel: Dawn of the Eagles, DS9 novel: The Never-Ending Sacrifice)
In 2385, Darrah's grandson Darrah Hayn served aboard the USS Lionheart. (TTN novel: The Poisoned Chalice)