Inside the frail body of Dr. Jekyll there lurks a monster of unstoppable proportions and unbridled bestial aggression. His name is Mr. Hyde.

Eminent London chemist Dr. Henry Jekyll spent a good portion of his career analyzing the dual nature of man, searching for the causes of evil within the hearts of men. Believing he had found the key to seperating the good and evil elements of man's nature, Jekyll used himself as a guinea pig to prove his theory completely.

Though Jekyll's serum was able to affect the transformation between the two men, it was not long before the strong and evil Hyde beat out the weaker Jekyll.

Jekyll now finds himself a slave to Hyde. As Hyde, he is an unstoppable, powerful beast who knows what he wants and knows how to get it. As Jekyll, he is the spent shell of a man, wracked with guilt and feelings of incompetence.

Like many weapons, using Dr. Jekyll's beast within is a gamble. Mr. Hyde is perhaps the strongest human the world has ever seen. His role in The League is straightforward: smash steel, bash heads and bounce bullets of his rock-hard body.

As an incarnation of the brute within us all, Hyde has no guilt, no fear, and no compunction against using murderous force to solve even the slightest confrontation. This makes him both a secret weapon to The League and a potential hazard of devastating proportions.