She joined the Army after graduating high school, receiving extensive psychotherapy and some limited gene therapy to prevent any attraction to the opposite sex. She admired the FOXHOUND unit, viewing the days when her 'uncle' and Solid Snake were members as the unit’s heyday, and wore a paint tattoo of the unit's 1990s logo on her left shoulder.
Raised in a house of military traditions, Meryl trained herself throughout her childhood in the arts of soldiery. Her adoptive father, Matt Campbell, was killed in action during the Gulf War when she was young. Unbeknownst to Meryl, she was actually Campbell's biological daughter as a result of an affair he had with his younger brother's wife.
