"Oh yes, you are so very divine, great archangel." Istredd takes his hand back and uses it to playfully ruffle Lucifer's hair. He isn't being disrespectful, it's just funny to him when the reality sets in that again, he is but a (powerful) human mage compared to his primordial supernatural partner.

He knows it wouldn't function that way, flirting doesn't have to make sense. "Maybe I should be called the devil's trap then." Considering he has neatly managed to get Lucifer wrapped around his finger, for better or for worse.