User blog comment:Marco the Marine Admiral/Orga is not a God Slayer/@comment-5552025-20121024054752

Yeah, I know 2nd generation is not official, but it's still a possibility. It seems, though, like Zancrow is technically a 2nd generation God Slayer since he was not taught directly by a god; although it is completely unknown if there would be a first generation should that be the case.