Angelica Keller was born on the world of Gilgamesh, raised in the slums of the world. She was an orphan, her parents having died in an accident, leaving other street urchins as her family. for years she stole and fought as part of a larger gang nivovled in beatings, drug dealing and even murder. Through the CAA 'money free' education drive she got a chance to go to school and onto college, providing an escape from the gang culture and poverty that ruled her childhood and home. She enlisted in the UNSC in 2606, going onto the Luna OCS Academy and passing with decent marks. She proved to be a leader and soldier of some talent though her true skill was in her skill as a combat engineer.