The phrase pied piper is used to refer to "a person who induces others to follow or imitate him or her, especially by means of false or extravagant promises." Does it have synonyms?
Definitely a different connotation, but "siren" could be a synonym here, in that it also uses an analogy to a mythological creature to refer to someone who lures people under false pretences. Of course, "siren" has a sexual connotation that "pied piper" lacks; both refer to a seduction of sorts, but "siren" is much more closely related to ideas of beauty and lust.
: one who tricks: such as a : a dishonest person who defrauds others by trickery b : a person (such as a stage magician) skilled in the use of tricks and illusion c : a cunning or deceptive character appearing in various forms in the folklore of many cultures