Imitator

[im-i-teyt] /ˈɪm ɪˌteɪt/

verb (used with object), imitated, imitating.
1.
to follow or endeavor to follow as a model or example:
to imitate an author’s style; to imitate an older brother.
2.
to mimic; impersonate:
The students imitated the teacher behind her back.
3.
to make a copy of; reproduce closely.
4.
to have or assume the appearance of; simulate; resemble.
/ˈɪmɪˌteɪt/
verb (transitive)
1.
to try to follow the manner, style, character, etc, of or take as a model: many writers imitated the language of Shakespeare
2.
to pretend to be or to impersonate, esp for humour; mimic
3.
to make a copy or reproduction of; duplicate; counterfeit
4.
to make or be like; resemble or simulate: her achievements in politics imitated her earlier successes in business
n.

1520s; see imitate + -or. Perhaps from French imitateur (14c.).
v.

1530s, a back-formation from imitation or imitator, or else from Latin imitatus. Related: Imitated; imitating. An Old English word for this was æfterhyrigan.