The blaster was instantly hefted from its resting stance, its barrel pointed upward mere moments after the thump passed. Echo then searched the ceiling, catching a glimpse of the vent moving out of its original position as his HUD lit up his visor, overlaying its marks and symbols on the hands before blinking in and out several times.

To be honest, he wasn't even sure what he was looking at when that metal face appeared. Was it a droid? If it was, then it wasn't functioning properly. "–Who's there?" The ARC trooper moved in, keeping the blaster trained on the vent opening, resting his finger on the side of the trigger.