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Walker was born in San Antonio, United States of America. He moved to Altivebrio in 1980, and joined the Alconbria Liberation Council. He played an important role in Alconbria's missile programs, and also in procuring explosives and military equipment. His brother, Henry Walker was wounded during the Battle of Carfo.
Walker lives in New Alcacer with his wife and two children, both of whom are scientists.