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Captain Troy is a Colonial Warrior attached to the battlestar Galactica during the discovery of Earth by the Fleet. As a child, he was known by his nickname of Boxey, which his mother, Serina, and his adoptive family aboard Galactica had used (Galactica Discovers Earth, Part I).
Much like his adoptive father, Apollo, Troy is a squadron leader and Viper pilot. His fellow Warrior, Dillon, is his wingman and both Troy and Dillon have a similar relationship that Apollo and Starbuck had prior to their departures from the Fleet. For instance, Troy has a tendency to adhere to the rules and was serious. With Apollo dead, Troy has been in the care of this grandfather, Commander Adama, and has grown to become a proficient Colonial Warrior, a goal he had promised to achieve after the Colonial holocaust (Saga of a Star World).
Upon discovery of the fabled Thirteenth Colony, Troy is tasked with leading missions to Earth, starting with the first contact mission to help develop Earth's technology in order to face the Cylon threat (Galactica Discovers Earth, Part I). He and Dillon are assigned to pursue contacts in the area of Southern California, but deviate from this when they go back in time, and when they visit New York state ("The Night the Cylons Landed, Part I & Part II").
He takes on the role of Scout Leader with the Galactica children, and seems to relish the position. He has deep empathy for the plight of others, and for the environment, and is motivated to action in order to alleviate these plights ("Space Croppers", "The Super Scouts, Part II").
In the novelization of "The Living Legend", which covers the events of "The Living Legend, Part I" and "The Living Legend, Part II", the introductory segment is written from the point of view of Troy, now a Commander, who was thrust into this role after the death of Adama. (This is an "expanded universe" story based upon Galactica 1980, and neither the book nor series are themselves considered canonical.)