Masketta Senpai’s review published on Letterboxd:
The key to any great impostor story is strongly characterizing the impostor and the person being replaced so that we, the audience, can know who is who - and, where the two become blended, appreciate the ambiguity. Unfortunately, Possessor is so invested in its concept and aesthetic that the meat and potatoes character stuff falls by the wayside. We're supposed to be watching this body hijacker and her victim wrestle for control of his body, but there's more than a few points where the viewer has no real way to understand the play-by-play, and this can needlessly mystify character decisions and motivations. As the film barrels towards the ending this becomes less an issue but it really hurt my enjoyment of the middle. Don't get me wrong, I'm all for gore and body horror and mind horror but I need it rooted in more than just concept to get the most from it.