So with the Zodiac Ethereals the Zodiac mirrors on their pelt somehow. If she's going with the Libra sign it could be symbolized by two tails for the scales in the sign, etc. But they do not possess the actual sky pelts. They instead have one eye that mimics the night sky with the constellation in it, and the other is the coloration of their birthstone.

Please check the page for Ethereals or message me when you can if you have questions! <3