Eric Koenig is a fictional character appearing in American comic books published by Marvel Comics. He first appeared in Sgt. Fury and the Howling Commandos #27 (February 1966) and he was created by writer Stan Lee and artist Dick Ayers. He is most commonly in association with the Howling Commandos and S.H.I.E.L.D. Patton Oswalt portrayed the character in the first season of the Marvel Cinematic Universe TV series Agents of S.H.I.E.L.D., however after Koenig died he continued to portray his identical brothers Billy, Sam, and Thurston throughout the seasons.