Garthamor was hired by the Galactic Federation as an expert in tactics and melee confrontations. He met with the group on an unnamed planet the day before their mission. He was well liked by the Colonel when they introduced themselves and didn't take much notice to Krombopulos Michael.
He woke up early the next morning to find Krombopulos Michael gone from the campsite. Having looked around with Nikto, he commented to the Colonel on Michael's disappearance, leading the General to believe Michael deserted them. Momentarily after, Michael appeared with the head of their unnamed target in his hand, greatly surprising Garthamor. Through a pair of binoculars, Garthamor saw the aftermath of Michael's attack and relayed it to the group how there were no survivors.