Alias No information Origin No information Occupation No information Powers/Skills No information Hobby No information Goals No information Type of Villain No information Jasper Sitwell is a recurring character in the Marvel Cinematic Universe film series overall. He is introduced as a supporting protagonist of Thor and The Avengers. But his true colors are revealed as he assumes the role of the quaternary antagonist of Captain America: The Winter Soldier, as he is a sleeper agent of HYDRA who poses as an agent of SHIELD in the series.