You had been in the bunker without a hunt for..awhile, to say the least. It has been weeks, the Winchesters randomly going off for hunts and leaving you with Cas. This time, when they got back, you had been in the middle of an energy burst. Castiel sitting and watching as you pretty much ran all over the place while Sam and Dean just stared in confusion. "Is this normal?" Dean piped up, and Cas simply nodded. "It is, yes. Demons have odd habits." He confirmed.