Shapeshifters are mythical beings or characters that can change their physical form or appearance at will. They are often found in folklore, legends, and various cultures around the world. Common examples include werewolves, who transform from human to wolf, and skinwalkers, a concept in Native American mythology where a person can change into an animal. In literature and media, shapeshifters are frequently depicted as having magical or supernatural abilities. They can serve various roles, from heroes to villains, and their transformations can symbolize themes of identity and change. Popular examples include Dr. Jekyll and Mr. Hyde and Mystique from the X-Men series.