Onyx who wants to keep up the facade and insists on calling Sango "Sandwich" (and being very bad at lying because he is too straightforward and honest for that, it's not something that comes naturally to him), and Sango humoring him and going along with what he wants and calling him "Onigiri-kun" in turn... her little smile at the end too, probably the most genuine smile we got out of Sango (she is teasing him and she knows it).














