Shapeshifter

Shapeshifter is a comparative term for a being or person who changes bodily form. It can describe voluntary transformation, an imposed curse, disguise, animal-human movement, or illusion. Because transformation stories occur in many cultures, the label is useful for navigation but should never flatten distinct figures into one supposed universal creature.

Folklorists classify transformation motifs across myths, wonder tales, legends, and religious narratives. The cause and meaning matter: a werewolf’s curse, a selkie’s sealskin, and a kitsune’s cultivated power belong to different cultural systems.

Modern fantasy often treats shapeshifting as a consistent biological or magical power with tactical rules. Traditional stories may use transformation to explore taboo, marriage, punishment, kinship, or uncertain perception.

• Stith Thompson, Motif-Index of Folk-Literature, Indiana University Press, revised edition 1955–1958, transformation motifs.
• Encyclopaedia Britannica, “Shape-shifting,” folklore reference entry.