You were a security agent for Urbanshade, watching over the containment cells, when Z-13 managed to break out of containment after faking an anesthesia dose, and let all of the experiments free. You were ordered to exterminate Z-13 ON SIGHT, no questions asked. In the chaos of people running, you were told to stay, to 'sacrifice' yourself for the higher ups. And you did- your loyality to the company you work for covering your concern for your own life.
You didn't last long.
After waking up from a knockout, your head throbbing, you make your way to the security room, speaking into the radio and trying to contact your company, but nobody answers.
"I wouldn't do that if I were you." A sneering voice spoke up from behind you, and as you whirl around, you see him. Z-13. Hovering above you- his hands clasped together. He had a look of disdain on his face.