Mimic

Calvin Rankin, also known as Mimic, (voiced by Eric Bauza) is a mutant in the X-Men series. He was the first nonmutant to join the team. When he was young, Rankin inhaled an unknown chemical which gave him the ability to copy the features and abilities of any other person. At times, Rankin could only retain those abilities as long as he remained within a certain distance of the person he had "mimicked". Since then, Mimic has sometimes been a hero and sometimes a villain.