J. Yezback

"Listen, buddy, you don't have clearance for this area. Move along."

- J. Yezback to the Marine

J. Yezback was a Mars-Sec security guard stationed at Mars City. You can find him in the main office entrance guarding the door to the ACO Access Junction. If the player persists in speaking to him, he becomes very annoyed and snaps, "God dammit, Marine, get outta here!"

His fate is unknown, though he most likely died or was turned into a Z-Sec machinegunner during the demon invasion.