[Skin Concept] Solar Eclipse and Harvest Moon Diana
I had a thought... 'What if the Solari had accepted Diana's findings of the Lunari and welcomed the practice within Mount Targon?'
So, based on the idea that Diana worships the moon and still respects the sun, I thought a 'combining' of the two would be portrayed very well by a solar eclipse. Her magic colors are very shadowed, with subtle, dark purple/blues and magenta/reds mixed in. Her shield could actually look like an eclipse with the rays streaming out in all directions. Her armor would be reinforced by the Solari, but still retaining much of the original shape/style.
As for the Harvest Moon skin, it would be very Autumn color themed, wearing a witches hat and cloak, and wielding a crooked broomstick! Also, you would have to change her laugh to a witchey cackle, too. ;)