Okay, so the new upcoming episode of supernatural-when it shows the past-and it shows the four standing there-Cas is there- And he-is in a female vessel?
I base all of my knowlege off the preview and this post I reblogged earlier.
If Cas is present in this group of angels then the only possible vessel is the lady in the tan and slightly dirty coat/ dress. (Since angels pick vessels from a bloodline I assume his vessel from about 100 years ago was white. She looks like she could be Jimmy’s grandma.) Lady in the red coat and guy angel are present in another shot together with Cas in his current vessel (i.e. present time).
If Cas indeed had a female vessel before Jimmy I would be very excited. Also it would make Cas have had predominantly female vessels in canon, which would please me greatly. (Jimmy, Claire and ‘Grandma Novak’. Sure, Jimmy’s become his body so he’s male coded whether he changes vessels or not. But it would be an interesting detail and you could even interpret it as Castiel favouring female vessels *lol* I know I’m stretching it.)