Clyde Dawson is an expert in infiltration and lockpicking who served in the UNSC supersoldier project, FREELANCER, under the name of Agent York. Known to be one of the best in the program, his skills proved invaluable to the many missions conducted within the project. After Director Leonard Church's arrest and imprisonment, Clyde served alongside several other FREELANCER agents in the closing days of the Human-Covenant War, before aiding and following his close friend Victoria O'Connell in going rogue from the UNSC. In the post-war era, he was a key member in the guerrilla warfare units alongside his fellow FREELANCERS, who took the fight to the opponents of the Interspecies Union, while remaining out of the UNSC's jurisdiction.