Anime & Manga
Johan Liebert is indeed a Monster.
"I saw hell right there in his eyes. Hell. In the eyes of a living human being."
—Hans Georg Schubert
on Johan Liebert
Anime and manga creators have created a wide variety of villains, and some of them, like the ones on this page, are utterly horrific in their cruelty and depravity.
The following have their own pages:
Naruto, Berserk, Anime And Manga A To H, Bleach, Devilman, Pretty Cure