Graviton

Glenn Talbot is a U.S. Air Force general and recurring S.H.I.E.L.D. ally who absorbs a sentient mineral called gravitonium, transforming him into the unstable, superpowered Graviton. Daisy Johnson blasts him into orbit to stop his rampage, and he dies in the vacuum of space. Read more →

First turns up in Agents of S.H.I.E.L.D. (Season 5).