Complete Monster/Battle Royale


 * Yonemi Kamon from Battle Royale. The administrator of the Battle Royale Program, where high school students are forced to kill one another. Hobbies: watching students kill each other, killing students, joking about said students' deaths, raping orphanage directors, etc. Consider: Kamon is one of the most evil men ever depicted in manga.
 * What makes Yonemi so noteworthy (and awesome) as a villain is that unlike the movie portrayal of the Director, he doesn't even pretend to buy into that crap about maintaining order or protecting the honor of the Empire. He enjoys raping and killing, and he's a huge fan of the Program because he gets to see teenagers deal with gut-wrenching emotions before dying horribly. He's so hardcore, even soldiers are visibly nervous around him.
 * Kazushi Niida and Toshinori Oda are two Complete Monster students who enjoy murdering their classmates, especially Niida, who gets sexually turned on by killing and tries to rape a girl after smashing her face to pulp.