Brooklyn Yates was born and raised in Roque, an average sized city located on the continent Pacifica, one of six such continents on the jungle world of Arcadia. Her mother was an astronomer who worked on the Deep Space Research Array that orbited the planet, while her father was a commissioned officer in the UNSC Marine Corp stationed at Fort Dean. The planet was a hotbed of Insurrectionist activity during her formative years with several armed conflicts between the UNSC and Insurrectionist forces occurring in the late 2520's.