Kasius

Kasius is the Kree overseer of the Lighthouse, a space station orbiting a devastated future Earth roughly ninety years ahead of the team's own time, who runs the station by breeding and trading captured Inhumans. He is killed by Coulson after being deafened by Simmons, in a desperate last stand.

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