Alexander Pierce Allegiance
Just like Loki, Alexander Pierce shows questionable commitment in the end. However, unlike Loki, he never actually shows his role as sleeper agent working for HYDRA until the end of the film. His comrades in S.H.I.E.L.D. as well as audiences hardly ever believe that he is a bad guy; however, when it is finally revealed that he works for HYDRA and his task is to destroy S.H.I.E.L.D., everyone is shocked. Even Marvel comic veterans are shocked because this treason is a fresh twist that hardly appears on the comic books.