Toshio Ozaki is one of the main protagonists of the anime/manga Shiki. Despite being one of the show's main protagonists (and being seen as justified by many), he commits various morally ambiguous acts during the second half of the series that could be considered villainous. The series itself is purposely written this way, to make it's audience think about morality, and so whether or not Ozaki is a villain is left up to the viewer.