Sentry is a Marvel Comics superhero with the power of "one million exploding suns," possessing superhuman strength, flight, and matter manipulation, but he is also a tragic figure whose dark alter ego, The Void, is a malevolent entity that mirrors his own fears and powers, leading to a cycle of amnesia and destruction that he often erases from the world's memory. His real name is Robert Reynolds, and his powers come from a "Golden Sentry Serum," but his mental instability and the existence of The Void make him one of Marvel's most powerful and dangerous characters