sleepsintheimpala:

So, the Reaper Billie was introduced to us singing

nothing satisfies me but your soul

in the same episode we find out that Amara eats souls. I wonder if one of the unintended consequences of Dean killing (old) Death is that we will get desertion in the ranks among the Reapers. Billie seems the most likely candidate to actually be the new Death, but Reapers have always been tricky characters on the show, particularly under Carver. And what would serve Amara better than to have Reapers bring her souls by the bucketload. So, I wonder if Billie is indeed the new Death if she is not going to have to eat her words to Sam and align herself with the Winchesters to keep her Reapers from serving Amara.

Innnnteresting.