antiperson

noun2

1. •
   Somebody who is not a person, or not accepted as a person, or who violates the conventions of personhood.

   • I'm not even a whole person anymore. Maybe not even a half person. I'm a negative person, an anti-person. I'm the opposite of everything human. — 2010
2. •
   A hypothetical person made out of antimatter.

   • There could be whole antiworlds and antipeople made out of antiparticles. However, if you meet your antiself, don't shake hands! — 1988