J'onn J'onzz (Earth-1: Post-Crisis)

"Some call me the Martian Manhunter"

- Calvin Swanwick

Martian Manhunter is a Martian, member of the Justice League. He poses as Calvin Swanwick, a Lieutenant General in the United States Army and Secretary of Defense.

Steppenwolf's Invasion
After Kal-El's death at the hands of Doomsday, Martian posed as Kal's adoptive mother Martha Kent to help a grieving Lois Lane. Later, after the Justice League had defeated Steppenwolf, Martian met with Bruce Wayne, warning him about Darkseid's quest for the Anti-Life Equation and offering his help.