Koyo Behirn was a Bajoran serving in the Space Guard during the 24th century.
Prior to transferring into the Bajoran Space Guard, he was a pilot in the Bajoran Militia.
After the Dominion War, he served as Tactical Officer aboard the USS Hathaway.
In November of 2377, he was promoted to Major and transferred to the Starfleet vessel Oglala to serve as Second Officer and commander of its 42 Bajoran Space Guard detachment. ("Oglala")