impersonator

noun

person who imitates or copies the behaviour or actions of another

Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in-bor. Middle English in- English im- Latin persōna Anglo-Norman persouneder. Middle English persoun English person Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-tós Proto-Indo-European *-eh₂tos Proto-Italic *-ātos Latin -ātuslbor. English -ate English impersonate English -or English impersonator From impersonate + -or.

One who fraudulently impersonates another person.
An entertainer whose act is based upon performing impressions of others.