History
Sharon Carter was the daughter of Harrison and Amanda Carter, two wealthy Virginians, and the younger sister of Margaret "Peggy" Carter, a heroic freedom fighter during World War II who had shared many adventures with Captain America before his supposed death at the end of the war. When Peggy returned home in need of hospitalization from traumatic shellshock, she told her younger sister many stories about Captain America. Inspired by these tales and her own sister's exploits, Sharon decided to become an agent of S.H.I.E.L.D., the international espionage agency.
On her first major assignment, Sharon Carter, code-named Agent 13, was chosen to pick up a cylinder containing the powerful explosive called Inferno-42 from a S.H.I.E.L.D. read more