In case you couldn’t tell, Frosty’s biological father is Pokey Pierce. I don’t ever plan on addressing it, so may as well say it here. Maybe it was a one-night stand, maybe it was a sperm donor (I’m leaning towards that latter.) What matters to Frost is that she has her Mom.
She had wings because of the ‘random Pinkie Genes’ thing. I’m not much of a fan of that anymore. At first she was a earth pony, but then I just wanted her to be unicorn. It works better for a story arch she has coming up.
Her final incarnation honestly came from an accident. I was screwing around with layers and I made an add layer. The colors that came up were just too good to ignore, so I edited it! I love it so much now, her purplish colors come from Maud.
The ribbon has always stayed consistent, I believe. Always in the same place and always pink. It also responds to her emotions, it comes undone when she’s really upset.