Gandalf's mutation has had me stumped since I got her! I've had many crazy ideas about what she is, hopefully the experts will be able to give me a straight answer finally
She looks like a Greywing but her markings are so pale, I mistake her for the albino girls from a distance all the time.
With the flash on, you can see the light violet coloring around the base of her tail.
The markings on her wings seem to end 2/3 of the way down