Cadet Gaila was a female 23rd century Orion individual who was an upper-class student at Starfleet Academy in 2258, in an alternate reality. She had an intimate relationship with James T. Kirk.
Gaila was one of a number of cadets who were pressed into as service Starfleet officers by an emergency order from Admiral Richard Barnett during the crisis in the Vulcan system. (TOS movie & novelization: Star Trek)