When the Vienna International Centre was bombed, Carter returned to the JCTC after giving Rogers information on Bucky Barnes. and joined the CIA, before being stationed at the Joint Counter Terrorist Centre.
In the aftermath of the HYDRA Uprising, Carter left the disbanded S.H.I.E.L.D. After HYDRA was revealed to have been operating within S.H.I.E.L.D., Carter chose to stay loyal to her organization, and fought during the Battle at the Triskelion to protect millions of lives. When Fury was attacked, she blew her cover to Rogers. Under direct orders from Nick Fury, Carter was tasked with going undercover as a nurse, living next to Steve Rogers. Although she never revealed her relation, not wanting to be put under the pressure of living up to any expectations. Following in her aunt's footsteps, Carter became an agent of S.H.I.E.L.D., codenamed Agent 13. Sharon Carter is the great-niece of legendary S.H.I.E.L.D. 'You know the whole hero thing is a joke, right? The way you gave up that shield, deep down, you must know it's all hypocrisy.' ―Sharon Carter to Sam Wilson
