M'xy, also known as the Gentleman, is a founding member of Vanguard (2001- ) and a being from the fifth dimension who possesses U.S. metahuman Mick Harrison. During the possession, he wears a top hat and coat, sparkling light emits in a trail from his eyes.
In 2001, M'xy arrived in Chicago, Illinois, in this dimension by possessing Harrison, whose metagene enabled him to subconsciously communicate with the fifth dimension. M'xy transformed 30 people into cows before he was taken to a psychiatric hospital. Before his planned release into the custody of the MCCA, he escaped the asylum and traveled into Chicago.
M'xy's evil counterpart is K'tl, who possessed another asylum inmate named Karl Starr.