Soooooo, idea. As we know, the aliens can use telekinesis, ect. Well what if, as Cassie begins to come to terms with that she really is half Lunairan, she begins to kind of start trying to experiment and try to do the things Serix does and when she actually figures out she has some of those powers, the purple in her eyes begins spreading to them being half purple half blue permanently instead of just around the edge? And maybe when she uses her powers the violet becomes more obvious? Maybe even to the point of at some times when she is trying really hard the blue in her eyes are gone completely temporarily until she stops using her powers and they go back to the halfway point?