J-Son gets my vote, for being a pretty silly, funny parody(or should that be rip-off) of an old horror movie villain. He also must have done something right, as he(they?) raped a few girls they were friends with and managed to pass it off as a prank, with no apparent ill-feelings.
Though I suppose I could be missing something there, what with my lack of knowledge of Japanese. It could've all been arranged as a prank for all I know, and as I recall, only one or two of the victims are shown at the end, so for all we know those who are off-screen could be utterly terrified and horrified or something.
At any rate I never really took to Alien War(Is that the one?) So I don't really have any affection for it. While Friday the 18th was the source of some of the first Viper gifs I saw on the net, which utterly inflamed my loins back in the day.