Agent Eric Koenig is the late brother of L.T., Thurston, Sam, and Billy Koenig and a character in ABC's Agents of S.H.I.E.L.D. He was killed by HYDRA infiltrator Grant Ward while he was assigned to the Providence facility.
Eric was portrayed by Patton Oswalt, who also portays his brothers, voices Remy from Ratatouille, Mr. Sparkles from Big Hero 6: The Series and Professor Dementor in Kim Possible and portrayed him in the 2019 live action remake of the same name.