Margaret Elizabeth ‘Peggy’ Carter is a British military officer who served during and after World War II with the Strategic Scientific Reserve. Agent Carter was Captain America’s superior officer and supported him through thick and thin. She’s very intelligent and also physically a very competent officer, able to perfectly stand her ground without help from men in a time when women were supposed to stay at home. Peggy’s a founding member of S.H.I.E.L.D., the intelligence agency she built together with Howard Stark and Colonel Chester Phillips.