This would be Itaweret, the protagonist from my upcoming novel Priestess of the Lost Colony, dressed up as if she were a Queen of Mycenae (although she is ethnically Kemetian, or ancient Egyptian, rather than Mycenaean). There’s actually a reason for this depiction that is implied in the book itself, but it comes up at the very end and I don’t want to give it away here. I have it say it’s always fun to combine the fashions of different cultures (in this case, Kemetian and Mycenaean) like this when designing characters’ costumes.