Reave was a krogan warlord, the only one of Saren Arterius' krogan to survive Shepard's raid on Virmire. Since then, Reave had established himself as a ruthless killing machine, fighting against foes for no apparent reason, non even to himself. This unstoppable juggernaut who was confused about his purpose, ravaged many mercenary bands, military patrols, and everything in between becoming one of the galaxy's most feared krogan.