Now, while this character is hubristic on the order of advanced Greek tragedy, that does strike me as improbable, especially given the years involved.
I shall have to give her sectoral heterochromia, instead. Perhaps have the other character laugh at the notion that it could mean being a sorcerer.
And I may give another character mismatched eyes. Without his being a sorcerer. He observes that perhaps it was best that his parents gave him to the Church, even without needing the training, because it was a symptom. But it gives him some backstory.