Peripheral Awareness is the ability to perceive events and movements outside of one’s direct line of sight allowing to detect attacks from behind, flanks etc.
Roll opposite against such maneuvers as backstab, flanking maneuver etc. If you are successful, their bonus from their skill is lowered by half of your success rate.
Peripheral Awareness helps spot enemies, incoming projectiles, or sudden changes in the environment outside your direct line of sight. It can be triggered: