[Another giggle, this time a bit more sheepish, and Souji inclines his head in a small, apologetic bow.]

Sorry, sorry! I guess it just comes naturally to me, huh? [He glances sideways at something, looking both fond and amused.]

I think it's also that I just see it as part of my duty as a shinki to bully and tease my god a bit. It keeps him from getting too serious and worrying about everything.