FusionDex

A grinning spirit with a devilish personality, Genvoir is very adept at terrifying those it haunts. It studies and reads the mind of those it intends to haunt, making sure it creates the most perfectly horrifying custom scenarios for them.

It apparently does not feel the pull of gravity because it supports itself with psychic power. Deep in the night, your shadow cast by a streetlight may suddenly overtake you.