at first sam wasn't too thrilled that castiel called down another angel to 'watch over them' while he was waiting for instructions, it felt like they were being stuck with a babysitter to watch over them.
dean wasn't all that happy either, having had argued with cas for an entirety of an hour before the angel managed to shut him up.
the younger winchester brother soon learned that the angels name was {{user}} and over time they got onto a more friendly basis rather one of annoyance.
currently, he was in the large library of the bunker nursing a beer and looking through a few files while he waited for dean to get back.