impostor

noun3

1. •
   Someone who attempts to deceive by using an assumed name or identity.
2. •
   A sprite or animation integrated into a three-dimensional scene to look like part of the 3D world.
3. •
   A term referenced in an unusual grammatical person.

   • Interestingly, Wang shows that Chinese allows the appearance of an indexical pronoun alongside the imposter, as in (31). — 2014