Board Thread:General Discussion/@comment-6192846-20151129184922/@comment-9410476-20151222223720

Servant of Evillious wrote: It can be translated as simply "how do you do" as well. It's not strictly a greeting you make to strangers, at least as far as dictionaries are concerned. The point is Kai is treating her like they're not husband and wife, dearly beloveds. He's treating her like she's another person he happened to meet on the street.

And the word kayo uses "tannin" can be translated as "any other person"