About a week ago I posted spoilers about Rachel, Castiel's new angel lieutenant. At the time she had yet to be cast, but no more! According to TV Fanatic, Sonya Salomaa has signed on to play Rachel. Who, you might ask? Well, she has appeared in V and could be seen for about a picosecond as the assistant to Ozymandias in Watchman.
Rachel is described as a badass with a finely tuned BS detector who doesn't suffer fools gladly. Luckily she's on our side, and very loyal to Cas.