Cray was an Andorian chan or thaan serving in Starfleet during the 24th century. As of 2366, he held the rank of lieutenant, and was the chief security and tactical officer on the USS Grissom under Captain Norman Kenyon. Cray was a candidate for the position of executive officer when Commander Paullina Simons was promoted from that post to first officer, but the assignment was given instead to Lieutenant Commander Katerina Mueller. Cray believed Mueller had been responsible for the explosion of a fusion reactor core on the colony of Sarn, and thus unworthy of the promotion. This resulted in a strong degree of emnity between the two officers. (NF - No Limits short story: "Performance Appraisal")

Cray was likewise displeased when Commander Mackenzie Calhoun was bought aboard as first officer in 2368, following the departure of Simons.

In 2369, Cray aided Kenyon in his conspiracy to destroy the Dufaux of the Anzibar system, in violation of both Starfleet orders and Federation law. Calhoun -- along with Mueller -- was able to stop Cray by tearing off one of his antennae during a hand-to-hand fight. (NF - The Captain's Table novel: Once Burned)

USS Grissom personnel
USS Grissom (Oberth-class)	Jonathan Esteban • David Marcus • Saavik • unnamed USS Grissom (NCC-638) personnel
USS Grissom (Excelsior-class)	Boyajian • Mackenzie Calhoun • Chu'lak • Cray • Norman Kenyon • Todd Kogutt • Rachel McLauren • Terry Oliver • Paullina Simons • Villers