Sorry... I looked at the scans after posting...
Fai seemed a bit mad with Kurogane because of all the vampire thing... (yeah, I know he is trying to protect him, but I still think he is a bit angry because he didn't respect his decision).
What do you thing he will do when he sees Sakura arriving with the egg, injured and bleeding?
I think that maybe they will have a big argument, because Kurogane did nothing to stop her... Fai looked very worried when Yuuko told him that she was outside.
Maybe at the end they will continue arguing about the vampire stuff or about Fai's past...