Katy M. O'Brian (born February 12, 1989) is an American actress, writer and martial artist. She is best known for her roles as Jentorra in Ant-Man and the Wasp: Quantumania, George in Syfy's zombie show Z Nation, Major Sarah Grey in The CW's superhero series Black Lightning and Kimball in Marvel's Agents of S.H.I.E.L.D. She plays Imperial communications officer Elia Kane in the second and third seasons of The Mandalorian.