Board Thread:Episode Discussion/@comment-25396609-20191130155818/@comment-27745396-20191202060502

Raven mentioned Vernal's name couple times, but not during that discussion. And knowing Raven, she choose Vernal to be a decoy because of her name or Vernal choose that name for herself afterwards to make people think she is the Spring Maiden.

Which would also mean that, based on both Cinder and Vernal, everyone who knows about the Maidens would suspect Winter to be one only because of her name is literally Winter Snow. Making her yet another decoy would make much more sense.

Unless they are planing to transfer Winter's soul into Penny/some other android body after she has gotten her powers. It would explain the aura transfer machine in the background.