Bloodsucker

"Too bad you won't have enough men to stop us, we could have used you, we could have destroyed S.H.I.E.L.D. ourselves, but no, guess now I know what to do."

- Bloodsucker to Captain America Special Agent Jonathan Leonard "Jon" Anderson (briefly went under the name of Gary Adams) was a former FBI Senior Special Agent who later abandoned the team and joined with S.H.I.E.L.D. and became a top agent. He later betrayed the agency and became known as the evil dark warrior known as '''Bloodsucker. '''