female
Contessa Valentina Allegra de Fontaine was a supporting character and later enemy of Nick Fury. She was a Soviet sleeper agent who joined S.H.I.E.L.D., but later joined HYDRA, as Madame Hydra, before joining Leviathan.
Valentina Allegra de Fontaine
Secret Agent
for Secret Agent in Fictional Characters Sorted by their Jobs
Suggested by mikeypascual
Just what the title says
