If you mean from how she doesn't look like Diana, the theory is that she's under some curse. Similar to how the glasses kept everyone thinking she's pretty, something else probably changed her hair and eye color
I belive she is Diana's daughter.
...how would she be Diana's daughter? the math isn't mathing
Her birth father may have had green eyes. Savora what ever the older dudes name is maybe her grandfather. He is Diana's dad.
The only question i get reading this is how did her eye colour change