Sophia Greenville is the drill instructor from the console versions of Metal Slug: Super Vehicle-001. She also appears in both Metal Slug Defense and Metal Slug Attack, while the latter, has a unique character sprite stationed in the Combat School mode.
When she was attending her junior high school, she dreamed of becoming a basketball player. After she graduated, she enrolled into a military academy. Her ability to excel in sports enables her to graduate as an official member of the Peregrine Falcons. Despite her wishes to become a member of special intelligence service in the Regular Army, she had to give up when her parents disagreed. However, she desperately wanted to stay in service and finally enrols as an instructor. After three years of trial and error, she obtains the ability to cheer up the trainees and guide them into becoming an effective soldier, but yet still remains as a very hard instructor.
In Metal Slug Attack and Defense she returns as a commander of the Regular Army, having apparently been promoted.