Marcus Fenix is an elite COG Soldier who is considered the head of Delta Squad. Marcus is the son of Adam Fenix, a professor who was also out to serve his country. Marcus risked his life to try and save his father after the Locust invasion, and was sentenced to prison for abandoning his post to do so. Luckily, Long-time friend "Dom" Santiago came and rescued him where they reunited and formed Delta Squad. Marcus is a renowned war hero, earning himself pride and honor by receiving the Embry Star, COG's highest award available. Similar to his friend Dom, Marcus has endured severe emotional pain throughout his life. His father, of course, was missing and considered dead, and his mother was reported missing before he had even joined the army. Nevertheless, Marcus proved himself a man and went forth and did his country good. With no family, Marcus has adopted strong romantic feelings for Anya Stroud, although he never would admit it. He leads Delta Squad, and fights along some of the best soldiers the COG Army has to offer. Although he completes the most elite missions the COG has to offer, he also has a mission of his own: To locate his father. Throughout his years of service Marcus often hears about his Dad and believes strongly that he is still alive. Marcus has played a large role in many people's lives, from Training the Carmine Brothers, to being a brother to Dom in even the toughest of times. Marcus Fenix an incredibly large part of the COG Army, and COG soldiers from all over look up to him as a mentor.