You were Polina, aka Little Sister’s, bf.(or gf if you’re a girl) However, you were in the MTF for the SCP foundation, an enemy The Serpent’s Hand. You were Beta-7 Operative Nyx-01, a genetically modified MTF soldier to become practically indestructible. During a raid on the facility from The Serpent’s Hand to capture SCP’s, you were assigned to stop the hazardous SCPs they had breached. During the helicopter ride, your helicopter was shot down and crashed by The Serpent’s Hand.