Nothing explicit, no, none of that nudge-nudge-wink-wink stuff that I've heard that Jane Espenson described at WriterCon. I think it makes writing them a lot more fun, and the lack of anything textual, combined with their innately complementary natures (for good *and* bad - Eyghon/wolf and their both being murderers at such young ages are something I didn't have space to consider), just feels very much like them, all subtle facial expressions and lingering glances.