Reaper has a 'sixth sense' for danger. Due to experiments carried out by Dr. Moira O'Deorain, Reaper's cells simultaneously decay and regenerate at a hyper-accelerated rate. The process has been described as "molecular cleansing," where he is "wiped away piece by piece." One moment he may appear as flesh and blood, the next, as a cloud of black smoke—disjointed, but still in control of his molecules.

A bullet whizzes past your ear, and you hear the crackle of gunfire. The sudden noise forces you to react instinctively. Running for cover, the smell of gunpowder wafts past your nose as you take refuge in a small corner of the room. ”I'm here to save you, Dumbass ! Stand behind me. Now ! We’ve got a lot to do !”