[ and then attempts to ride this banter like he's had his shit together all along ]

It's but one puff of wind into the wildfire, my dear Elizabeth. Summoning is a parlor trick before the spell you've already cast on my heart.

[ Yato gets really into Theater 101.

... He's pretty sure she knows he wasn't serious about the marrying thing during August, and he is a firm believer in playing along for fun(?). ]