This may be the weirdest question ever asked here, but I'll bite.
I'd have to go with Seed. He makes Saki his queen and appears to be completely loyal to her until Irear comes along - and it takes alot of effort on her part to try to break up what he and Saki have going, ultimately failing. (Irear could go on this list, too, since she's remorseful about it afterwards.)
Then maybe Erik and Fritz from V8's Friday the 18th. They were friends with the girls before the night, and appear to remain friends afterwards. The whole scenario is just a scary joke Annue and the boys play on the other three girls.