Luko was a male Bre'ellan living in the 24th century. In the 2370s, he was a member of Chakotay's Maquis cell, and subsequently a crewman aboard the USS Voyager during her seven-year sojourn in the Delta Quadrant. Upon returning to the Alpha Quadrant, he decided to remain in Starfleet and was eventually promoted to the rank of lieutenant.

In 2378, he became security chief aboard the USS Excelsior (NCC-77246). (Star Trek: Hidden Frontier: "Great Starship Robbery")

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