I have read the first five books of the series (just started reading book 6 this week) and have a game coming up.  While thinking about what type of character that I wanted to make I began playing around with the idea of something involving an angel.

But having not read all of the books yet I was wondering if angels have come up yet in the series.

So ... have there been any angels in the Dresden books that I don't know about yet?  How were they handled?