Well, I was thinking about this:
What would happen if Kurogane and Fai had to fight each other? Just imagine Fai would be willing to fight and they both were willing to kill. They're both doing their best. Who, do you think, would win?
I personally totally root for Fai. With all those incredible powers of his and his other excellent skills, he's likely to be superior to Kurogane in my opinion. And even after the vampire thing, he may have lost half of his magic but he's probably gained more speed, strength, better reflexes and such.
That's why I vote for Fai. Besides, I love the idea of Fai being better in battle than Kurogane since it'd totally change the things *___* Say, Fai could easily make Kurogane go away or leave him but he rather opens up slowly, oh so slowly. Or he is willing to be the "weaker" one in their relationship, as he seems to be at the moment. (Darn, I can't explain, though I know perfectly well what I mean *headdesk*)
~*Kjesta*~