Grekel was a commander in one of Trill's security forces in the 2370s.

In early-October 2376, Commander Grekel was part of President Lirisse Maz's contingent during the neo-Purist instigated terrorist acts. Colonel Behza Rianu of the Trill Defense Ministry's Defense Command tried to contact Grekel to warn of the neurogenic radiation bombs that had been discovered, but communication was cut off before the full warning had been delivered. (DS9 - Worlds of DS9 novel: Trill: Unjoined)

Grekel's gender was not established, neither was his or her species, although it is likely to be Trill.
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